Effect of strongly coupled plasma on the magnetic dipolar and quadrupolar transitions of two-electron ions

Abstract

Effect of strongly coupled plasma on the excitation energies and transition probabilities for the respective transitions 1s 2 : 1 S e ! 1sns: 3 S e (n ¼ 2, 3, 4) and 1s 2 : 1 S e ! 1snp: 3 P o (n ¼ 2, 3, 4) allowed by magnetic dipolar and quadrupolar excitations have been analyzed for the first time for the twoelectron ions C 4þ , O 6þ , Ne 8þ , Mg 10þ , Si 12þ , and S 14þ . Time dependent Hatree-Fock theory within variational approach has been adopted for such a study. The effect of surrounding plasma has been treated through the standard Ion-Sphere (IS) model of the plasma where the plasma density is varied systematically from a low value to a pretty high value such that the respective excited states go over to continuum due to such a confinement. The effect of external pressure generated due to plasma confinement on the estimated spectral properties has been analyzed systematically. V C 2013 AIP Publishing LLC. [http://dx.

Shannon, Rényi entropies, and Fisher information calculations of the Li1+ and Be2+ ions screened by the ion-sphere plasma model

“…The ion-sphere model has been used to study one-and two-electron atom properties as the ionization energy levels, oscillator strengths, dynamic polarizabilities, and quadrupolar electronic transitions. For example, P. K. Mukherjee and co-workers [9][10][11][12][13] have shown results for the hydrogen and helium-like atoms embedded in the ion-sphere model where the authors report how the energy levels, dipole electronic transitions, and hyperpolarizabilities are modified. The helium-like atoms have been studied extensively with correlated methods where the energy levels and electronic transitions are the principal results of those investigations [14][15][16][17][18][19][20][21][22].…”

Magnetic dipolar and quadrupolar transitions in two-electron atoms under exponential-cosine-screened Coulomb potential

“…Recently, the importance of magnetic dipolar and quadrupolar transitions under varying plasma density has been explicitly pointed out. 32 In this work, the time dependent coupled Hartree-Fock (TDCHF) method, within a variational scheme, has been adopted to obtain the ionization potential, excitation energies, and magnetic dipolar and quadrupolar transition probabilities for the two-electron systems He, Be 2þ , C 4þ , and O 6þ . We have investigated the low lying excited states 1s 2 : 1 S e !…”