Variational calculations for the energy levels of confined two- electron atomic systems

ID: 635542.0, MPI für Astrophysik / Molecular Physics
Variational calculations for the energy levels of confined two- electron atomic systems
Authors:	Canals Gustavo A. ; Saha, B.; Mukherjee, T. K.
Language:	English
Date of Publication (YYYY-MM-DD):	2008
Title of Journal:	Theoretical Chemistry Accounts
Journal Abbrev.:	Theor. Chem. Acc.
Volume:	108
Issue / Number:	5
Start Page:	305
End Page:	310
Review Status:	Peer-review
Audience:	Experts Only
Abstract / Description:	An accurate variational calculation has been performed for the ground-state-energy values of confined two-electron isoelectronic series from He to Ar16+. The confinement is obtained by embedding the ion in an overall charge neutral environment like that of a plasma. The confinement potential is chosen as that of a screened Coulomb potential between charges, obtained from a Debye model. The wave function is expanded in terms of product basis sets involving interparticle coordinates. The energy levels are found to be less bound with an increase of the screening parameter and ultimately become unstable. One- and two-particle moments have been calculated for the first time under such screening. The study is expected to throw new light on the behavior of the energy levels of foreign atoms embedded in an overall neutral environment which can be treated like a plasma.
Free Keywords:	confined atoms; variational calculations; Debye plasma
External Publication Status:	published
Document Type:	Article
Communicated by:	Norghel. S.
Affiliations:	MPI für Astrophysik
Identifiers:	ISI:000175922000008 ISSN:14442-811X Canals Gustavo Adolfo Dr.Física Teórica; Ph.D. math. MPI für Astrophysik-Molecular Physics adolfocanals@educ.ar