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Published in last 1 year |  In last 2 years |  In last 3 years |  All Please wait a minute... For selected: Download citations EndNote Ris BibTeX Toggle thumbnails Select State-selective charge exchange cross sections in collisions of highly-charged sulfur ions with helium and molecular hydrogen Xiaolong Zhu(朱小龙), Shucheng Cui(崔述成), Dadi Xing(邢大地), Jiawei Xu(徐佳伟), B. Najjari, Dongmei Zhao(赵冬梅), Dalong Guo(郭大龙), Yong Gao(高永), Ruitian Zhang(张瑞田), Maogen Su(苏茂根), Shaofeng Zhang(张少锋), and Xinwen Ma(马新文) Chin. Phys. B, 2024, 33 (2): 023401.   DOI: 10.1088/1674-1056/ad0b01 Abstract （77）   HTML （3）    PDF （2055KB）（62）       Knowledge map    The state-selective cross section data are useful for understanding and modeling the x-ray emission in celestial observations. In the present work, using the cold target recoil ion momentum spectroscopy, for the first time we investigated the state-selective single electron capture processes for ${\rm S}^{q+}$-He and H$_{2}$ ($q=11$-15) collision systems at an impact energy of $q\times 20 $ keV and obtained the relative state-selective cross sections. The results indicate that only a few principal quantum states of the projectile energy level are populated in a single electron capture process. In particular, the increase of the projectile charge state leads to the population of the states with higher principal quantum numbers. It is also shown that the experimental averaged $n$-shell populations are reproduced well by the over-barrier model. The database is openly available in Science Data Bank at 10.57760/sciencedb.j00113.00091. Select Databases of 2D material-substrate interfaces and 2D charged building blocks Jun Deng(邓俊), Jinbo Pan(潘金波), and Shixuan Du(杜世萱) Chin. Phys. B, 2024, 33 (2): 026101.   DOI: 10.1088/1674-1056/ad0626 Abstract （83）   HTML （1）    PDF （1152KB）（61）       Knowledge map    Discovery of materials using "bottom-up" or "top-down" approach is of great interest in materials science. Layered materials consisting of two-dimensional (2D) building blocks provide a good platform to explore new materials in this respect. In van der Waals (vdW) layered materials, these building blocks are charge neutral and can be isolated from their bulk phase (top-down), but usually grow on substrate. In ionic layered materials, they are charged and usually cannot exist independently but can serve as motifs to construct new materials (bottom-up). In this paper, we introduce our recently constructed databases for 2D material-substrate interface (2DMSI), and 2D charged building blocks. For 2DMSI database, we systematically build a workflow to predict appropriate substrates and their geometries at substrates, and construct the 2DMSI database. For the 2D charged building block database, 1208 entries from bulk material database are identified. Information of crystal structure, valence state, source, dimension and so on is provided for each entry with a json format. We also show its application in designing and searching for new functional layered materials. The 2DMSI database, building block database, and designed layered materials are available in Science Data Bank at https://doi.org/10.57760/sciencedb.j00113.00188. Select Benchmarking calculations of excitation energies and transition properties with spectroscopic accuracy of highly charged ions used for the fusion plasma and astrophysical plasma Chunyu Zhang(张春雨), Kai Wang(王凯), Ran Si(司然), Jinqing Li(李金晴), Changxian Song(宋昌仙), Sijie Wu(吴思捷), Bishuang Yan(严碧霜), and Chongyang Chen(陈重阳) Chin. Phys. B, 2023, 32 (11): 113102.   DOI: 10.1088/1674-1056/acef07 Abstract （108）   HTML （3）    PDF （1350KB）（93）       Knowledge map    Atomic radiative data such as excitation energies, transition wavelengths, radiative rates, and level lifetimes with high precision are the essential parameters for the abundance analysis, simulation, and diagnostics in fusion and astrophysical plasmas. In this work, we mainly focus on reviewing our two projects performed in the past decade. One is about the ions with $Z\lesssim 30$ that are generally of astrophysical interest, and the other one is about the highly charged krypton (Z=36) and tungsten (Z=74) ions that are relevant in research of magnetic confinement fusion. Two different and independent methods, namely, multiconfiguration Dirac-Hartree-Fock (MCDHF) and the relativistic many-body perturbation theory (RMBPT) are usually used in our studies. As a complement/extension to our previous works for highly charged tungsten ions with open M-shell and open N-shell, we also mainly focus on presenting and discussing our complete RMBPT and MCDHF calculations for the excitation energies, wavelengths, electric dipole (E1), magnetic dipole (M1), electric quadrupole (E2), and magnetic quadrupole (M2) transition properties, and level lifetimes for the lowest 148 levels belonging to the 3l3 configurations in Al-like W61+. We also summarize the uncertainties of our systematical theoretical calculations, by cross-checking/validating our datasets from our RMBPT and MCDHF calculations, and by detailed comparisons with available accurate observations and other theoretical calculations. The data are openly available in Science Data Bank at https://doi.org/10.57760/sciencedb.10569. Select An effective method to calculate the electron impact excitation cross sections of helium from ground state to a final channel in the whole energy region Rui Sun(孙瑞), De-Ling Zeng(曾德灵), Rui Jin(金锐), Xiao-Ying Han(韩小英), Xiang Gao(高翔), and Jia-Ming Li(李家明) Chin. Phys. B, 2023, 32 (11): 113401.   DOI: 10.1088/1674-1056/acf11f Abstract （117）   HTML （1）    PDF （665KB）（61）       Knowledge map    The electron impact excitation (EIE) cross sections of an atom/ion in the whole energy region are needed in many research fields, such as astrophysics studies, inertial confinement fusion researches and so on. In the present work, an effective method to calculate the EIE cross sections of an atom/ion in the whole energy region is presented. We use the EIE cross sections of helium as an illustration example. The optical forbidden 11S-n1S (n = 2-4) and optical allowed 11S-n1P (n=2-4) excitation cross sections are calculated in the whole energy region using the scheme that combines the partial wave R-matrix method and the first Born approximation. The calculated cross sections are in good agreement with the available experimental measurements. Based on these accurate cross sections of our calculation, we find that the ratios between the accurate cross sections and Born cross sections are nearly the same for different excitation final states in the same channel. According to this interesting property, a universal correction function is proposed and given to calculate the accurate EIE cross sections with the same computational efforts of the widely used Born cross sections, which should be very useful in the related application fields. The datasets presented in this paper are openly available at https://www.doi.org/10.57760/sciencedb.j00113.00142. Select Oscillator strength and cross section study of the valence-shell excitations of NO2 by fast electron scattering Qiang Sun(孙强), Jin-Feng Chen(陈锦峰), Zhi-Wei Nie(聂智伟), Jian-Hui Zhu(朱剑辉), and Lin-Fan Zhu(朱林繁) Chin. Phys. B, 2023, 32 (11): 113402.   DOI: 10.1088/1674-1056/acf5d6 Abstract （96）   HTML （0）    PDF （1926KB）（44）       Knowledge map    Oscillator strengths and cross sections of the valence-shell excitations in NO2 are of great significance in testing the theoretical calculations and monitoring the state of the ozone layer in the earth's atmosphere. In the present work, the generalized oscillator strengths of the valence-shell excitations in NO2 were obtained based on the fast electron scattering technique at an incident electron energy of 1.5 keV and an energy resolution of about 70 meV. By extrapolating the generalized oscillator strengths to the limit of a zero squared momentum transfer, the optical oscillator strengths for the dipole-allowed transitions have been obtained, which provide an independent cross check to the previous experimental results. Based on the BE-scaling method, the corresponding integral cross sections have also been derived systematically from the excitation threshold to 5000 eV. The present dynamic parameters can provide the fundamental spectroscopic data of NO2 and have important applications in the studies of atmospheric science. The datasets presented in this paper, including the GOSs, OOSs and ICSs, are openly available at https://doi.org/10.57760/sciencedb.j00113.00156. Select Absolute dielectronic recombination rate coefficients of highly charged ions at the storage ring CSRm and CSRe Zhongkui Huang(黄忠魁), Shuxing Wang(汪书兴), Weiqiang Wen(汶伟强), Hanbing Wang(汪寒冰), Wanlu Ma(马万路), Chongyang Chen(陈重阳), Chunyu Zhang(张春雨), Dongyang Chen(陈冬阳), Houke Huang(黄厚科), Lin Shao(邵林), Xin Liu(刘鑫), Xiaopeng Zhou(周晓鹏), Lijun Mao(冒立军), Jie Li(李杰), Xiaoming Ma(马晓明), Meitang Tang(汤梅堂), Jiancheng Yang(杨建成), Youjin Yuan(原有进), Shaofeng Zhang(张少锋), Linfan Zhu(朱林繁), and Xinwen Ma(马新文) Chin. Phys. B, 2023, 32 (7): 073401.   DOI: 10.1088/1674-1056/acbc69 Abstract （140）   HTML （2）    PDF （3175KB）（73）       Knowledge map    Dielectronic recombination (DR) is one of the dominant electron-ion recombination mechanisms for most highly charged ions (HCIs) in cosmic plasmas, and thus, it determines the charge state distribution and ionization balance therein. To reliably interpret spectra from cosmic sources and model the astrophysical plasmas, precise DR rate coefficients are required to build up an accurate understanding of the ionization balance of the sources. The main cooler storage ring (CSRm) and the experimental cooler storage ring (CSRe) at the Heavy-Ion Research Facility in Lanzhou (HIRFL) are both equipped with electron cooling devices, which provide an excellent experimental platform for electron-ion collision studies for HCIs. Here, the status of the DR experiments at the HIRFL-CSR is outlined, and the DR measurements with Na-like Kr25+ ions at the CSRm and CSRe are taken as examples. In addition, the plasma recombination rate coefficients for Ar12+, 14+, Ca14+, 16+, 17+, Ni19+, and Kr25+ ions obtained at the HIRFL-CSR are provided. All the data presented in this paper are openly available at https://doi.org/10.57760/sciencedb.j00113.00092. Select Theoretical study of electron-impact broadening for highly charged Ar XV ion lines Chao Wu(吴超), Xiang Gao(高翔), Yu-Hao Zhu(朱宇豪), Xiao-Ying Han(韩小英), Bin Duan(段斌),Ju Meng(孟举), Song-Bin Zhang(张松斌), Jun Yan(颜君), Yong Wu(吴勇), and Jian-Guo Wang(王建国) Chin. Phys. B, 2023, 32 (5): 053101.   DOI: 10.1088/1674-1056/acb769 Abstract （188）   HTML （4）    PDF （1069KB）（153）       Knowledge map    Spectral line widths produced by collisions between charged particles and emitters are of special interest for precise plasma spectroscopy. The highly charged Ar XV ion is demonstrated to have strong intrashell electron interactions, which manifest as an atomic system with many resonance structures, due to the quasi-degeneracy of orbital energies. In this paper we use the relativistic R-matrix method to investigate the electron-impact broadening of highly charged Ar XV ion spectral lines under the impact approximation. It is found that the results considering resonance structures are significantly different from those of the distorted wave approach. Furthermore, we propose a new empirical formula with a correction term to take into account the effect of resonances for electron-impact widths over a relatively wide range of plasma conditions. The corresponding fitting parameters of the new empirical formula for all 47 calculated transitions are also given with an estimated accuracy within 1%, which should be convenient for practical applications. The dataset that supported the findings of this study is available in Science Data Bank, with the link https://doi.org/10.57760/sciencedb.j00113.00101. Select Asymmetry parameters in single ionization of He, Ne by XUV pulses Jian-Ting Lei(雷建廷), Xuan Yu(余璇), Guo-Qiang Shi(史国强), Chen-Yu Tao(陶琛玉), Shao-Hua Sun(孙少华), Shun-Cheng Yan(闫顺成), Xin-Wen Ma(马新文), Jing-Jie Ding(丁晶洁), and Shao-Feng Zhang(张少锋) Chin. Phys. B, 2023, 32 (5): 053205.   DOI: 10.1088/1674-1056/aca6d9 Abstract （161）   HTML （7）    PDF （1713KB）（109）       Knowledge map    Fully differential cross-sections of single ionization of He and Ne atoms are studied by linearly polarized extreme ultraviolet (XUV) photons in the energy range of 22.1 eV-43.7 eV, using a reaction microscope. Photoelectron angular distributions and the $\beta $ asymmetry parameters for He 1s$^{2}$ electrons prove the reliability of our experiment, and the $\beta $ asymmetry parameters extracted from the angular distributions of Ne 2p$^{6}$ electrons are obtained. By comparing with different theoretical calculations, it is found that the contribution of the electron correlation effect in Ne 2p$^{6}$ single ionization becomes increasingly important as the incident photon energy increases, while the relativistic effect is relatively low in the whole incident energy range. Our experimental $\beta $ asymmetry parameters may serve as a significant reference to test the most elaborated theories in the field. The datasets presented in this paper, including the photoelectron angular distributions and $\beta $ asymmetry parameters, are openly available at https://doi.org/10.57760/sciencedb.j00113.00073. Select Optical spectroscopy of CrO and electronic states of the Cr group metal monoxides Lei Zhang(张磊), Yao Yu(于尧), Xinwen Ma(马新文), and Jie Yang(杨杰) Chin. Phys. B, 2023, 32 (5): 053301.   DOI: 10.1088/1674-1056/acb763 Abstract （170）   HTML （8）    PDF （1540KB）（70）       Knowledge map    All of the experimentally known electronic states of the Cr group metal monoxides (CrO, MoO, and WO) have been presented in the paper. The optical spectra of the CrO molecule have been investigated in the gas phase through a combination of the laser-induced fluorescence (LIF) excitation and single-vibronic-level (SVL) emission spectroscopy in the supersonic expansion. The rotational constants of the vibronic electronic states, including ${\rm X}\,{}^{5}\Pi_{-1}$ ($v'' = 0$-3), ${\rm B}\,{}^{5}\Pi _{-1}$ ($v^\prime =0$-10), and ${\rm B}\,{}^{5}\Pi_{1}$ ($v^\prime = 1$, 5), and the vibrational constants of the spin-orbit components ${\rm X}\,{}^{5}\Pi _{-1,0,1}$ have been obtained. The molecular constants of the MoO and WO molecules have been summarized by reviewing the previous spectroscopic studies, and a comprehensive energy level diagram of the Cr group metal monoxides has been constructed. By comparing the electronic configurations, bond lengths, and vibrational frequencies of all the transition metal monoxides in the ground electronic state, the significance of the relativistic effect in the bonding of the 5d transition metal monoxides has been discussed. The related spectroscopic data of the CrO molecule are available at https://doi.org/10.57760/sciencedb.j00113.00085. Select Evaluating thermal expansion in fluorides and oxides: Machine learning predictions with connectivity descriptors Yilin Zhang(张轶霖), Huimin Mu(穆慧敏), Yuxin Cai(蔡雨欣), Xiaoyu Wang(王啸宇), Kun Zhou(周琨), Fuyu Tian(田伏钰), Yuhao Fu(付钰豪), and Lijun Zhang(张立军) Chin. Phys. B, 2023, 32 (5): 056302.   DOI: 10.1088/1674-1056/accdca Abstract （192）   HTML （6）    PDF （1865KB）（188）       Knowledge map    Open framework structures (e.g., ScF3, Sc2W3O12, etc.) exhibit significant potential for thermal expansion tailoring owing to their high atomic vibrational degrees of freedom and diverse connectivity between polyhedral units, displaying positive/negative thermal expansion (PTE/NTE) coefficients at a certain temperature. Despite the proposal of several physical mechanisms to explain the origin of NTE, an accurate mapping relationship between the structural-compositional properties and thermal expansion behavior is still lacking. This deficiency impedes the rapid evaluation of thermal expansion properties and hinders the design and development of such materials. We developed an algorithm for identifying and characterizing the connection patterns of structural units in open-framework structures and constructed a descriptor set for the thermal expansion properties of this system, which is composed of connectivity and elemental information. Our developed descriptor, aided by machine learning (ML) algorithms, can effectively learn the thermal expansion behavior in small sample datasets collected from literature-reported experimental data (246 samples). The trained model can accurately distinguish the thermal expansion behavior (PTE/NTE), achieving an accuracy of 92%. Additionally, our model predicted six new thermodynamically stable NTE materials, which were validated through first-principles calculations. Our results demonstrate that developing effective descriptors closely related to thermal expansion properties enables ML models to make accurate predictions even on small sample datasets, providing a new perspective for understanding the relationship between connectivity and thermal expansion properties in the open framework structure. The datasets that were used to support these results are available on Science Data Bank, accessible via the link https://doi.org/10.57760/sciencedb.j00113.00100. Select Measuring stellar populations, dust attenuation and ionized gas at kpc scales in 10010 nearby galaxies using the integral field spectroscopy from MaNGA Niu Li(李牛) and Cheng Li(李成) Chin. Phys. B, 2023, 32 (3): 039801.   DOI: 10.1088/1674-1056/acb0ba Abstract （289）   HTML （7）    PDF （1004KB）（193）       Knowledge map    As one of the three major experiments of the fourth-generation Sloan Digital Sky Survey (SDSS-IV), the Mapping Nearby Galaxies at Apatch Point Observatory (MaNGA) survey has obtained high-quality integral field spectroscopy (IFS) with a resolution of 1-2 kpc for ～104 galaxies in the local universe during its six-year operation from July 2014 through August 2020. It is crucial to reliably measure the physical properties of the different components in each spectrum before one can use the data for any scientific study. In the past years we have made lots of efforts to develop a novel technique of full spectral fitting, which estimates a model-independent dust attenuation curve from each spectrum, thus allowing us to break the degeneracy between dust attenuation and stellar population properties when fitting the spectrum with stellar population synthesis models. We have applied our technique to the final data release of MaNGA, and obtained measurements of stellar population properties and emission line parameters, as well as the kinematics and dust attenuation of both stellar and ionized gas components. In this paper we describe our technique and the content and format of our data products. The whole dataset is publicly available in Science Data Bank with the link https://doi.org/10.57760/sciencedb.j00113.00088. Select Atlas of dynamic spectra of fast radio burst FRB 20201124A Bo-Jun Wang(王铂钧), Heng Xu(胥恒), Jin-Chen Jiang(姜金辰), Jiang-Wei Xu(徐江伟), Jia-Rui Niu(牛佳瑞), Ping Chen(陈平), Ke-Jia Lee(李柯伽), Bing Zhang(张冰), Wei-Wei Zhu(朱炜玮), Su-Bo Dong(东苏勃), Chun-Feng Zhang(张春风), Hai Fu(傅海), De-Jiang Zhou(周德江), Yong-Kun Zhang(张永坤), Pei Wang(王培), Yi Feng(冯毅), Ye Li(李晔), Dong-Zi Li(李冬子), Wen-Bin Lu(鲁文宾), Yuan-Pei Yang(杨元培), R. N. Caballero, Ce Cai(蔡策), Mao-Zheng Chen(陈卯蒸), Zi-Gao Dai(戴子高), A. Esamdin(艾力·伊沙木丁), Heng-Qian Gan(甘恒谦), Jin-Lin Han(韩金林), Long-Fei Hao(郝龙飞), Yu-Xiang Huang(黄玉祥), Peng Jiang(姜鹏), Cheng-Kui Li(李承奎), Di Li(李菂), Hui Li(李辉), Xin-Qiao Li(李新乔), Zhi-Xuan Li(李志玄), Zhi-Yong Liu(刘志勇), Rui Luo(罗睿), Yun-Peng Men(门云鹏), Chen-Hui Niu(牛晨辉), Wen-Xi Peng(彭文溪), Lei Qian(钱磊), Li-Ming Song(宋黎明), Jing-Hai Sun(孙京海), Fa-Yin Wang(王发印), Min Wang(汪敏), Na Wang(王娜), Wei-Yang Wang(王维扬), Xue-Feng Wu(吴雪峰), Shuo Xiao(肖硕), Shao-Lin Xiong(熊少林), Yong-Hua Xu(徐永华), Ren-Xin Xu(徐仁新), Jun Yang(杨俊), Xuan Yang(杨轩), Rui Yao(姚蕊), Qi-Bin Yi(易祁彬), You-Ling Yue(岳友岭), Dong-Jun Yu(于东俊), Wen-Fei Yu(余文飞), Jian-Ping Yuan(袁建平), Bin-Bin Zhang(张彬彬), Song-Bo Zhang(张松波), Shuang-Nan Zhang(张双南), Yi Zhao(赵一), Wei-Kang Zheng(郑伟康), Yan Zhu(朱岩), and Jin-Hang Zou(邹金航) Chin. Phys. B, 2023, 32 (2): 029801.   DOI: 10.1088/1674-1056/aca7ed Abstract （287）   HTML （9）    PDF （1500KB）（190）       Knowledge map    Fast radio bursts (FRBs) are highly dispersed millisecond-duration radio bursts,[1,2] of which the physical origin is still not fully understood. FRB 20201124A is one of the most actively repeating FRBs. In this paper, we present the collection of 1863 burst dynamic spectra of FRB 20201124A measured with the Five-hundred-meter Aperture Spherical radio Telescope (FAST). The current collection, taken from the observation during the FRB active phase from April to June 2021, is the largest burst sample detected for any FRB so far. The standard PSRFITs format is adopted, including dynamic spectra of the burst, and the time information of the dynamic spectra, in addition, mask files help readers to identify the pulse positions are also provided. The dataset is available in Science Data Bank, with the link https://www.doi.org/10.57760/sciencedb.j00113.00076. Select Time-resolved K-shell x-ray spectra of nanosecond laser-produced titanium tracer in gold plasmas Zhencen He(何贞岑), Jiyan Zhang(张继彦), Jiamin Yang(杨家敏), Bing Yan(闫冰), and Zhimin Hu(胡智民) Chin. Phys. B, 2023, 32 (1): 015202.   DOI: 10.1088/1674-1056/ac8e95 Abstract （269）   HTML （3）    PDF （1274KB）（96）       Knowledge map    A study of a nanosecond laser irradiation on the titanium-layer-buried gold planar target is presented. The time-resolved x-ray emission spectra of titanium tracer are measured by a streaked crystal spectrometer. By comparing the simulated spectra obtained by using the FLYCHK code with the measured titanium spectra, the temporal plasma states, i.e., the electron temperatures and densities, are deduced. To evaluate the feasibility of using the method for the characterization of Au plasma states, the deduced plasma states from the measured titanium spectra are compared with the Multi-1D hydrodynamic simulations of laser-produced Au plasmas. By comparing the measured and simulated results, an overall agreement for the electron temperatures is found, whereas there are deviations in the electron densities. The experiment-theory discrepancy may suggest that the plasma state could not be well reproduced by the Multi-1D hydrodynamic simulation, in which the radial gradient is not taken into account. Further investigations on the spectral characterization and hydrodynamic simulations of the plasma states are needed. All the measured and FLYCHK simulated spectra are given in this paper as datasets. The datasets are openly available at http://www.doi.org/10.57760/sciencedb.j00113.00032. Select LAMOST medium-resolution spectroscopic survey of binarity and exotic star (LAMOST-MRS-B): Observation strategy and target selection Jiao Li(李蛟), Jiang-Dan Li(李江丹), Yan-Jun Guo(郭彦君), Zhan-Wen Han(韩占文), Xue-Fei Chen(陈雪飞), Chao Liu(刘超), Hong-Wei Ge(葛宏伟), Deng-Kai Jiang(姜登凯), Li-Fang Li(李立芳), Bo Zhang(章博), Jia-Ming Liu(刘佳明), Hao Tian(田浩), Hao-Tong Zhang(张昊彤), Hai-Long Yuan(袁海龙), Wen-Yuan Cui(崔文元),Juan-Juan Ren(任娟娟), Jing-Hao Cai(蔡靖豪), and Jian-Rong Shi(施建荣) Chin. Phys. B, 2023, 32 (1): 019501.   DOI: 10.1088/1674-1056/ac9362 Abstract （237）   HTML （3）    PDF （3317KB）（141）       Knowledge map    LAMOST-MRS-B is one of the sub-surveys of LAMOST medium-resolution ($R\sim7500$) spectroscopic survey. It aims at studying the statistical properties (e.g., binary fraction, orbital period distribution, mass ratio distribution) of binary stars and exotic stars. We intend to observe about 30000 stars ($10 {\rm mag}\leq G < 14.5$ mag) with at least 10 visits in five years. We first planned to observe 25 plates around the galactic plane in 2018. Then the plates were reduced to 12 in 2019 because of the limitation of observation. At the same time, two new plates located at the high galactic latitude were added to explore binary properties influenced by the different environments. In this survey project, we set the identified exotic and low-metallicity stars with the highest observation priorities. For the rest of the selected stars, we gave the higher priority to the relatively brighter stars in order to obtain high quality spectra as many as possible. Spectra of 49129 stars have been obtained in LAMOST-MRS-B field and released in DR8, of which 28828 and 3375 stars have been visited more than twice and ten times with $\rm SNR \geq 10$, respectively. Most of the sources are B-, A-, and F-type stars with $\rm -0.6< [Fe/H] < 0.4 $ dex. We also obtain 347 identified variable and exotic stars and about 250 stars with $\rm [Fe/H] <-1$ dex. We measure radial velocities (RVs) by using 892233 spectra of the stars. The uncertainties of RV achieve about $1$ ${\rm km \cdot s^{-1}}$and $10$ ${\rm km \cdot s^{-1}}$ for 95% of late- and early-type stars, respectively. The datasets presented in this paper are available at http://www.doi.org/10.57760/sciencedb.j00113.00035. Select Electron excitation processes in low energy collisions of hydrogen-helium atoms Kun Wang(王堃), Chuan Dong(董川), Yi-Zhi Qu(屈一至), Ling Liu(刘玲), Yong Wu(吴勇),Xu-Hai Hong(洪许海), and Robert J. Buenker Chin. Phys. B, 2022, 31 (12): 123401.   DOI: 10.1088/1674-1056/aca14c Abstract （296）   HTML （1）    PDF （603KB）（210）       Knowledge map    The electron excitation processes of $\rm H(1s) + He(1s^{2}) \to H(2s/2p) + He(1s^{2})$ are studied in impact energy range of 20—2000 eV/u by using the quantum-mechanical molecular orbital close-coupling (QMOCC) method. Total and state-selective cross sections have been obtained and compared with the available theoretical and experimental results. The results agree well with available measurements in the overlapping energy regions overall. The comparison of our results with other theoretical calculations further demonstrates the importance of considering a sufficient number of channels. The datasets presented in this paper, including the excitation cross sections, are openly available at https://www.doi.org/10.57760/sciencedb.j00113.00083. Select Energy levels and magnetic dipole transition parameters for the nitrogen isoelectronic sequence Mu-Hong Hu(胡木宏), Nan Wang(王楠), Pin-Jun Ouyang(欧阳品均),Xin-Jie Feng(冯新杰), Yang Yang(杨扬), and Chen-Sheng Wu(武晨晟) Chin. Phys. B, 2022, 31 (9): 093101.   DOI: 10.1088/1674-1056/ac7a12 Abstract （351）   HTML （7）    PDF （905KB）（177）       Knowledge map    Theoretical calculations of the energy levels and magnetic dipole transition parameters for the 1s22s22p3 and 1s22p5 configurations of nitrogen isoelectronic sequence with Z=21-30 are performed using multi-congfiguration Dirac-Fock (MCDF) method. Based on the relativistic computational code GRASP2k compiled within the framework of MCDF method, the electron correlations, Breit interaction and QED effects are well treated in detail. The energy levels, line strengths and transition rates of magnetic dipole transition are obtained and compared with the experimental data available. For most cases, good agreements are achieved and the relative differences of them are less than 0.114%, 8.43% and 9.80%, respectively. The scaling laws of the fine structure splitting and transition rate are obtained on the isoelectronic sequence and the corresponding physical mechanisms are discussed. The data sets for tables are openly available at https://www.doi.org/10.57760/sciencedb.j00113.00022. Select State-to-state integral cross sections and rate constants for the N+(3P)+HD→NH+/ND++D/H reaction: Accurate quantum dynamics studies Hanghang Chen(陈航航), Zijiang Yang(杨紫江), and Maodu Chen(陈茂笃)† Chin. Phys. B, 2022, 31 (9): 098204.   DOI: 10.1088/1674-1056/ac7e3a Abstract （336）   HTML （1）    PDF （983KB）（47）       Knowledge map    The reactive collisions of nitrogen ion with hydrogen and its isotopic variations have great significance in the field of astrophysics. Herein, the state-to-state quantum time-dependent wave packet calculations of N$^{+}$($^{3}$P)$+{\rm HD}\to {\rm NH}^{+}$/ND$^{+} +{\rm D/H}$ reaction are carried out based on the recently developed potential energy surface [Phys. Chem. Chem. Phys. 21 22203 (2019)]. The integral cross sections (ICSs) and rate coefficients of both channels are precisely determined at the state-to-state level. The results of total ICSs and rate coefficients present a dramatic preference on the ND$^{+}$ product over the NH$^{+}$ product, conforming to the long-lived complex-forming mechanism. Product state-resolved ICSs indicate that both the product molecules are difficult to excite to higher vibrational states, and the ND$^{+}$ product has a hotter rotational state distribution. Moreover, the integral cross sections and rate coefficients are precisely determined at the state-to-state level and insights are provided about the differences between the two channels. The present results would provide an important reference for the further experimental studies at the finer level for this interstellar chemical reaction. The datasets presented in this paper, including the ICSs and rate coefficients of the two products for the title reaction, are openly available at https://www.doi.org/10.57760/sciencedb.j00113.00034. Select New experimental measurement of natSe(n, γ) cross section between 1 eV to 1 keV at the CSNS Back-n facility Xin-Rong Hu(胡新荣), Long-Xiang Liu(刘龙祥), Wei Jiang(蒋伟), Jie Ren(任杰), Gong-Tao Fan(范功涛), Hong-Wei Wang(王宏伟), Xi-Guang Cao(曹喜光), Long-Long Song(宋龙龙), Ying-Du Liu(刘应都), Yue Zhang(张岳), Xin-Xiang Li(李鑫祥), Zi-Rui Hao(郝子锐), Pan Kuang(匡攀), Xiao-He Wang(王小鹤), Ji-Feng Hu(胡继峰), Bing Jiang(姜炳), De-Xin Wang(王德鑫), Suyalatu Zhang(张苏雅拉吐), Zhen-Dong An(安振东), Yu-Ting Wang(王玉廷), Chun-Wang Ma(马春旺), Jian-Jun He(何建军), Jun Su(苏俊), Li-Yong Zhang(张立勇), Yu-Xuan Yang(杨宇萱), Sheng Jin(金晟), and Kai-Jie Chen(陈开杰) Chin. Phys. B, 2022, 31 (8): 080101.   DOI: 10.1088/1674-1056/ac6ee2 Abstract （384）   HTML （0）    PDF （2402KB）（96）       Knowledge map    The 74Se is one of 35 p-nuclei, and 82Se is a r-process only nucleus, and their (n, γ) cross sections are vital input parameters for nuclear astrophysics reaction network calculations. The neutron capture cross section in the resonance range of isotopes and even natural selenium samples has not been measured. Prompt γ-rays originating from neutron-induced capture events were detected by four C6D6 liquid scintillator detectors at the Back-n facility of China Spallation Neutron Source (CSNS). The pulse height weighting technique (PHWT) was used to analyze the data in the 1 eV to 100 keV region. The deduced neutron capture cross section was compared with ENDF/B-VIII.0, JEFF-3.2, and JENDL-4.0, and some differences were found. Resonance parameters were extracted by the R-matrix code SAMMY in the 1 eV-1 keV region. All the cross sections of natSe and resonance parameters are given in the datasets. The datasets are openly available at http://www.doi.org/10.11922/sciencedb.j00113.00019. Select Relativistic calculations on the transition electric dipole moments and radiative lifetimes of the spin-forbidden transitions in the antimony hydride molecule Yong Liu(刘勇), Lu-Lu Li(李露露), Li-Dan Xiao(肖利丹), and Bing Yan(闫冰) Chin. Phys. B, 2022, 31 (8): 083101.   DOI: 10.1088/1674-1056/ac6ee1 Abstract （271）   HTML （0）    PDF （888KB）（109）       Knowledge map    Calculations on the spectroscopic constants and transition properties of the first three states (${\rm a}^{1}\Delta $, ${\rm b}^{1}\Sigma^{+}$, and X$^{3}\Sigma^-$) of the SbH molecule were performed under the relativistic framework using the exact two-component Hamiltonian (X2C). The potential energy curves in the Franck-Condon region were computed and compared with the previous values. Furthermore, the transition dipole moments for the weak spin-forbidden transitions (${\rm b}0^{+}$-X$_{1}0^{+}$, ${\rm b}0^{+}$-X$_{2}$1, X$_{1}0^{+}$-X$_{2}$1, and X$_{2}$1-${\rm a}$2) were reported. The spontaneous radiative lifetime of the ${\rm b}^{1}\Sigma^{+}$ ($\upsilon '=0$) state was calculated as 163.5 $\pm$ 7.5 μs, which is in reasonable agreement with the latest experimental value of 173 $\pm$ 3 μs. The spontaneous radiative lifetimes of the X$_{2}$1 ($\upsilon '=0$) state and the ${\rm a}$2 ($\upsilon '=0$) state were calculated to be 48.6 s and $\sim 8 $ ms, respectively. Our study is expected to be a benchmark transition property computation for comparison with other theoretical and experimental results. The datasets presented in this paper, including the transition dipole moments, are openly available at https://dx.doi.org/10.11922/sciencedb.j00113.00018. Select Integral cross sections for electron impact excitations of argon and carbon dioxide Shu-Xing Wang(汪书兴) and Lin-Fan Zhu(朱林繁) Chin. Phys. B, 2022, 31 (8): 083401.   DOI: 10.1088/1674-1056/ac6336 Abstract （445）   HTML （0）    PDF （3591KB）（118）       Knowledge map    Electron-impact excitation integral cross sections play an important role in understanding the energy transfer processes in many applied physics. Practical applications require integral cross sections in a wide collision energy range from the excitation threshold to several keV. The recently developed BE-scaling method is able to meet the demands of integral cross sections for dipole-allowed transitions while the prerequisite relies on the accurate generalized oscillator strengths. Fast electron and x-ray scatterings are the conventional experimental techniques to approach the generalized oscillator strengths, and the joint study by both methods can provide credible cross-checks. The validated generalized oscillator strengths can then be used to extrapolate optical oscillator strengths by fitting the data with the Lassettre formula. The fitted curve also enables the integration of generalized oscillator strengths over the whole momentum transfer region to obtain the BE-scaled integral excitation cross sections. Here, experimental measurements by both fast electron and x-ray scattering of argon and carbon dioxide are reviewed. The integral cross sections for some low-lying states are derived from the cross-checked generalized oscillator strengths for the first time. The integral cross sections presented in this paper are openly available at https://doi.org/10.11922/sciencedb.01466. page Page 1 of 2 Total 29 records First page Prev page Next page Last page