Abstract:
The equation of motion coupled cluster methodology within relativistic framework has been applied
to analyze the electron correlation effects on the low lying dipole allowed excited states of Ne and
Al3þ under classical and quantum plasma environments. The effect of confinement due to classical
plasma has been incorporated through screened Coulomb potential, while that of quantum plasma has
been treated by exponential cosine screened Coulomb potential. The confined structural properties
investigated are the depression of ionization potential, low lying excitation energies (dipole allowed),
oscillator strengths, transition probabilities, and frequency dependent polarizabilities under systematic
variation of the plasma-atom coupling strength determined through the screening parameter. Specific
atomic systems are chosen for their astrophysical importance and availability of experimental data
related to laboratory plasma with special reference to Al3þ ion. Here, we consider 1s22s22p6ð1S0Þ !
1s22s22p5 ns=nd ð1P1Þ ðn ¼ 3; 4Þ dipole allowed transitions of Ne and Al3þ. Results for the free (isolated) atomic systems agree well with those available in the literature. Spectroscopic properties under
confinement show systematic and interesting pattern with respect to plasma screening parameter.
