TRANSITION RATES FOR LITHIUM-LIKE IONS, SODIUM-LIKE IONS, AND NEUTRAL ALKALI-METAL ATOMS

✍ Scribed by W.R. Johnson; Z.W. Liu; J. Sapirstein

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 789 KB
• Volume: 64
• Category: Article
• ISSN: 0092-640X
• DOI: 10.1006/adnd.1996.0024

✦ Synopsis

Third-order many-body perturbation theory is used to obtain E1 transition amplitudes for ions of the lithium and sodium isoelectronic sequences and for the neutral alkali-metal atoms potassium, rubidium, cesium, and francium. Complete angular reductions of the first-, second-, and third-order amplitudes are given. Tables of transition energies and rates are given for the 2p 1/2 r 2s 1/2 , 2p 3/2 r 2s 1/2 , 3s 1/2 r 2p 1/2 , and 3s 1/2 r 2p 3/2 transitions in the lithium isoelectronic sequence and for the corresponding 3p 1/2 r 3s 1/2 , 3p 3/2 r 3s 1/2 , 4s 1/2 r 3p 1/2 , and 4s 1/2 r 3p 3/2 transitions in the sodium sequence. For neutral alkali atoms, amplitudes of np 1/2 r ns 1/2 , np 3/2 r ns 1/2 , (n / 1)s 1/2 r np 1/2 , and (n / 1)s 1/2 r np 3/2 transitions are evaluated, where n is the principal quantum number of the valence electron in the atomic ground state. Semi-empirical corrections for the omitted fourth-and higher-order terms in perturbation theory are given for the neutral alkali-metal atoms. Comparisons with previous high-precision calculations and with experiment are made.