中国物理B ›› 2026, Vol. 35 ›› Issue (1): 13201-013201.doi: 10.1088/1674-1056/adf4ae

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New spectroscopic data on even-parity autoionization states for two-color two-step photoionization of nickel atom

Jun-Yao Zhang(张钧尧)1,2,3, Jing-Yi Xiong(熊静逸)2, Hong-Ru Zhou(周鸿儒)2, Cai-Hua Zhu(朱才华)2, Huai-Miao Sun(孙槐苗)1,2, Li-De Wang(王立德)1,2,3, Kai-Chen Ma(马恺宸)2, Jun-Jie Chai(柴俊杰)1,2, and Yun-Fei Li(李云飞)1,2,†   

  1. 1 National Key Laboratory of Particle Transport and Separation Technology, Tianjin 300180, China;
    2 Research Institute of Physical and Chemical Engineering of Nuclear Industry, Tianjin 300180, China;
    3 Tianjin Key Laboratory of Stable Isotope Materials Technology, Tianjin 300180, China
  • 收稿日期:2025-05-28 修回日期:2025-07-24 接受日期:2025-07-28 发布日期:2025-12-29
  • 通讯作者: Yun-Fei Li E-mail:Ipce_liyf@mails.cneic.com.cn
  • 基金资助:
    This work was supported by the China National Nuclear Corporation Basic Research Project (Grant No. CNNC-JCYJ-202327).

New spectroscopic data on even-parity autoionization states for two-color two-step photoionization of nickel atom

Jun-Yao Zhang(张钧尧)1,2,3, Jing-Yi Xiong(熊静逸)2, Hong-Ru Zhou(周鸿儒)2, Cai-Hua Zhu(朱才华)2, Huai-Miao Sun(孙槐苗)1,2, Li-De Wang(王立德)1,2,3, Kai-Chen Ma(马恺宸)2, Jun-Jie Chai(柴俊杰)1,2, and Yun-Fei Li(李云飞)1,2,†   

  1. 1 National Key Laboratory of Particle Transport and Separation Technology, Tianjin 300180, China;
    2 Research Institute of Physical and Chemical Engineering of Nuclear Industry, Tianjin 300180, China;
    3 Tianjin Key Laboratory of Stable Isotope Materials Technology, Tianjin 300180, China
  • Received:2025-05-28 Revised:2025-07-24 Accepted:2025-07-28 Published:2025-12-29
  • Contact: Yun-Fei Li E-mail:Ipce_liyf@mails.cneic.com.cn
  • Supported by:
    This work was supported by the China National Nuclear Corporation Basic Research Project (Grant No. CNNC-JCYJ-202327).

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摘要： The development of collinear resonance ionization spectroscopy for studying the nuclear structure of nickel isotopes far from the stability line relies on high-efficiency two-color two-step photoionization pathways. We systematically investigated the even-parity autoionization spectrum of atomic nickel through resonance ionization mass spectrometry (RIMS). Fifteen intense single-color photoionization lines and corresponding transitions in the 300-325 nm range were identified and excluded as potential interference peaks for subsequent two-color studies. Fifty-one even-parity autoionization states in the 64000-66800 cm$^{-1}$ range were identified for the first time by scanning from five intermediate excited states of the 3d$^{8}$(${}^{3}$F)4s4p(${}^{3}$P$^{\rm o}$) configuration. Forty-eight of these states were assigned unique total angular momentum quantum numbers ($J$) based on electric dipole transition selection rules. The autoionization state at 64437.77 cm$^{-1}$ was identified as an optimal final state for enhancing photoionization efficiency in two-color two-step pathways. This study provides comprehensive datasets of even-parity autoionization states of nickel, supporting both the advancement of collinear resonance ionization spectroscopy for exotic nickel isotopes and theoretical modeling of autoionization states. The datasets are openly available at https://doi.org/10.57760/sciencedb.j00113.00280.

关键词: nickel, autoionization states, even-parity, resonance ionization mass spectrometry (RIMS)

Abstract: The development of collinear resonance ionization spectroscopy for studying the nuclear structure of nickel isotopes far from the stability line relies on high-efficiency two-color two-step photoionization pathways. We systematically investigated the even-parity autoionization spectrum of atomic nickel through resonance ionization mass spectrometry (RIMS). Fifteen intense single-color photoionization lines and corresponding transitions in the 300-325 nm range were identified and excluded as potential interference peaks for subsequent two-color studies. Fifty-one even-parity autoionization states in the 64000-66800 cm$^{-1}$ range were identified for the first time by scanning from five intermediate excited states of the 3d$^{8}$(${}^{3}$F)4s4p(${}^{3}$P$^{\rm o}$) configuration. Forty-eight of these states were assigned unique total angular momentum quantum numbers ($J$) based on electric dipole transition selection rules. The autoionization state at 64437.77 cm$^{-1}$ was identified as an optimal final state for enhancing photoionization efficiency in two-color two-step pathways. This study provides comprehensive datasets of even-parity autoionization states of nickel, supporting both the advancement of collinear resonance ionization spectroscopy for exotic nickel isotopes and theoretical modeling of autoionization states. The datasets are openly available at https://doi.org/10.57760/sciencedb.j00113.00280.

Key words: nickel, autoionization states, even-parity, resonance ionization mass spectrometry (RIMS)

中图分类号:  (Autoionization)

  • 32.80.Zb
82.80.Ms (Mass spectrometry (including SIMS, multiphoton ionization and resonance ionization mass spectrometry, MALDI)) 42.55.Mv (Dye lasers)