Doubly excited bound and resonance states of helium
JK Saha, TK Mukherjee - Physical Review A—Atomic, Molecular, and Optical …, 2009 - APS
Highly precise energy values for the first 14 P 3 e bound states of helium arising out of two
electrons having equal azimuthal quantum number are being calculated by using Ritz …
electrons having equal azimuthal quantum number are being calculated by using Ritz …
Unnatural parity states of helium with screened Coulomb potentials
S Kar, YK Ho - International Journal of Quantum Chemistry, 2008 - Wiley Online Library
Abstract Effect of screened Coulomb (Yukawa) potentials on the doubly excited meta‐stable
bound states and the resonance states with unnatural parities of the helium atom have been …
bound states and the resonance states with unnatural parities of the helium atom have been …
Ritz variational calculation for two-electron–one-photon transitions in helium
Variational calculations for the energy levels of doubly excited 3 dnf (D∘ 1, 3) states (n= 4–
12) for helium have been performed using the extended Hylleraas basis set. No previous …
12) for helium have been performed using the extended Hylleraas basis set. No previous …
Metastable bound D1, 3o states below N= 3 ionization threshold of He+
JK Saha, S Bhattacharyya… - The Journal of Chemical …, 2010 - pubs.aip.org
The applicability of Ritz-variational principle for 3 dnf (D 1, 3 o) states lying between N= 2
and N= 3 ionization threshold of singly ionized helium is discussed in this communication …
and N= 3 ionization threshold of singly ionized helium is discussed in this communication …
One-photon two-electron transitions for metastable helium
S Kar, YK Ho - The European Physical Journal D, 2009 - Springer
We have obtained very accurate excitation energies for helium corresponding to the
transitions 2p 2 3 P e↦ nln'l'3 D o (n,n'\geqslant3) using highly correlated Hylleraas-type …
transitions 2p 2 3 P e↦ nln'l'3 D o (n,n'\geqslant3) using highly correlated Hylleraas-type …