Lowest Excitation Energy of 9Be
Date
2007
Authors
Stanke, Monika
Kedziera, Dariusz
Bubin, Sergiy
Adamowicz, Ludwik
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Variational calculations employing explicitly correlated Gaussian functions and explicitly including the
nuclear motion [i.e., without assuming the Born-Oppenheimer (BO) approximation] have been performed
to determine the lowest singlet transition energy in the 9Be atom. The non-BO wave functions were used
to calculate the 2 relativistic corrections ( 1=137:035 999 679). With those corrections and with the
3 and 4 QED corrections determined previously by others, we obtained 54 677:35 cm 1 for the 31S !
21S transition energy. This result falls within the error bracket for the experimental transition of
54 677:26 10 cm 1. This is the first time an electronic transition of Be has been calculated from first
principles with the experimental accuracy
Description
Keywords
Research Subject Categories::NATURAL SCIENCES::Physics, 9Be atom, Born-Oppenheimer approximation
Citation
Monika Stanke, Dariusz Ke˛dziera, Sergiy Bubin, Ludwik Adamowicz; 2007; Lowest Excitation Energy of 9Be; PHYSICAL REVIEW LETTERS