Premium
Calculations of D‐wave bound states and resonance states of the screened helium atom using correlated exponential wave functions
Author(s) -
Kar Sabyasachi,
Ho Y. K.
Publication year - 2010
Publication title -
international journal of quantum chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.484
H-Index - 105
eISSN - 1097-461X
pISSN - 0020-7608
DOI - 10.1002/qua.22074
Subject(s) - excited state , atomic physics , resonance (particle physics) , wave function , helium atom , bound state , yukawa potential , physics , atom (system on chip) , series (stratigraphy) , electron , coulomb , exponential function , helium , chemistry , quantum mechanics , paleontology , computer science , biology , embedded system , mathematical analysis , mathematics
We have investigated the effects of screened Coulomb (Yukawa) potentials on the bound 1,3 D states and the doubly excited 1,3 D e resonance states of helium atom using highly correlated exponential basis functions. The Density of resonance states are calculated using stabilization method. Highly correlated exponential basis functions are used to consider the correlation effect between the charged particles. A total of 18 resonances (nine each for 1 D e and 3 D e states) below the n = 2 He + threshold has been calculated. For each spin states, this includes four members in the 2p n p series, three members in the 2s n d series, and two members in 2p n f series. The resonance energies and widths for various screening parameters ranging from infinity to a small value for these 1,3 D e resonance states are reported along with the bound‐excited 1s3d 1,3 D state energies. Overall behavior of the spectral profile of 1s3d 1 D state of helium atom due to electron‐electron and electron‐nucleus screening are also presented. Accurate resonance energies and widths are also reported for He in vacuum. © 2009 Wiley Periodicals, Inc. Int J Quantum Chem, 2010