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Chin. Phys. B, 2015, Vol. 24(12): 123101    DOI: 10.1088/1674-1056/24/12/123101
ATOMIC AND MOLECULAR PHYSICS Prev   Next  

Influence of a strong magnetic field on the hydrogen molecular ion using B-spline-type basis-sets

Zhang Yue-Xia, Zhang Xiao-Long
Department of Physics, Chongqing University, Chongqing 400044, China
Abstract  

As an improvement on our previous work [J. Phys. B: At. Mol. Opt. Phys. 45 085101 (2012)], an accurate method combining the spheroidal coordinates and B-spline basis is applied to study the ground state 1σg and low excited states 1σu, 1πg,u,1δg,u,2σg of the H2+ in magnetic fields ranging from 109 Gs (1 Gs=10-4 T) to 4.414×1013 Gs. Comparing the one-center method used in our previous work, the present method has a higher precision with a shorter computing time. Equilibrium distances of the states of the H2+ in strong magnetic fields were found to be accurate to 3~5 significant digits (s.d.) and the total energies 6~11 s.d., even for some antibonding state, such as 1πg, which is difficult for the one-center method to give reliable results while the field strength is B≥q1013 Gs. For the large disagreement in previous works, such as the equilibrium distances of the 1πg state at B=109 Gs, the present data may be used as a reference. Further, the potential energy curves (PECs) and the electronic probability density distributions (EPDDs) of the bound states 1σg, 1πu, 1δg and antibonding states 1σu, 1πg, 1δu for B=1, 10, 100, 1000 a.u. (atomic unit) are compared, so that the different influences of the magnetic fields on the chemical bonds of the bound states and antibonding states are discussed in detail.

Keywords:  magnetic field      B-spline      hydrogen molecular ion     
Received:  18 July 2015      Published:  05 December 2015
PACS:  31.10.+z (Theory of electronic structure, electronic transitions, and chemical binding)  
  31.15.-p (Calculations and mathematical techniques in atomic and molecular physics)  
  31.15.ac (High-precision calculations for few-electron (or few-body) atomic systems)  
Fund: 

Project supported by the National Natural Science Foundation of China (Grant No. 11204389) and the Natural Science Foundation Project of Chongqing (Grant Nos. CSTC2012jjA50015 and CSTC2012jjA00012).

Corresponding Authors:  Zhang Yue-Xia     E-mail:  zyuex02@cqu.edu.cn

Cite this article: 

Zhang Yue-Xia, Zhang Xiao-Long Influence of a strong magnetic field on the hydrogen molecular ion using B-spline-type basis-sets 2015 Chin. Phys. B 24 123101

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