TITLE:
Velocity Form Calculations of Generalized Oscillator Strengths for 3s→ (3p, 4p, 5p, 6p) Dipole Transitions of Atomic Sodium in Debye Plasma
AUTHORS:
Louis Gomis, Clement Diatta, Moustapha Sadibou Tall, Ibrahima Gueye Faye, Rama Gomis, Yande Diouf, Mamadou Coulibaly
KEYWORDS:
Plasma Screening Effect, Correlation Effect, Sodium Atomic, Velocity Form GOS, Restricted Hatree-Fock, Random Phase Approximation with Exchange
JOURNAL NAME:
Open Journal of Applied Sciences,
Vol.14 No.6,
June
24,
2024
ABSTRACT: In this paper, the generalized oscillator strengths (GOSs) of excitations of atomic sodium from ground state to 2p63s0 (3p, 4p, 5p, 6p) states, immersed in Debye plasma, were calculated by using wavefunctions which were obtained numerically from the restricted Hartree-Fock (RHF) equation. This RHF equation employs the local density approach for exchange interactions including plasma Debye screening. Theoretical RHF and random phase approximation with exchange (RPAE) velocity calculations have shown that the GOSs for excitations to
3
s
0
(
3 p,4 p,5 p,6 p
)
depend on the plasma Debye screening effects, as shown by the reduction in the GOS amplitude with decreasing Debye length
λ
D
. The agreement between the present RPAE V results for the transitions
3 s→3
s
0
(
3 p,4 p,5 p
)
and the length calculations of Martínez-Flores was satisfactory. Correlation effects were found quite to be significant in the vicinity of the maxima of the GOS of the
3 s→3
s
0
(
4 p,5 p,6 p
)
excitations by using the RPAE V approach. We note the poor influence of many electron correlations on the GOS of
(
3 s→3 p
)
transition with the same principal quantum number. Finally, we comment that the RPAE V calculations are useful in investigating electron correlation effects on the transition GOS of atomic sodium planted in Debye plasma. The present velocity results also reveal that the
3 s→3
s
0
(
5p, 6p
)
transition GOSs tend to be delocalized due to more significant screening effects at Debye lengths
λ
D
=20
and 30 a.u. for excited subshells 5p and 6p, respectively. We report here novel results of GOS for
3 s→3
s
0
6p
transition obtained from different Debye lengths.