M1 transition probabilities between fine structure components2L J (L ≥ 1)

Abstract

Abstract. Spontaneous emission transition probabilities of the magnetic dipole transitions between states of ground state configurations consisting of one nl electron (or a hole) outside a closed shell have been calculated by using relativistic terms of order c~2Z 2 and using hydrogenic orbitals to calculate the required overlap integrals. The line strengths calculated for the Boron and Fluorine isoelectronic sequences are in excellent agreement with the calculations involving Dirac wavefunctions for all ions upto Z = 60. The maximum difference at the highest value of Z = 92 is about 6%. Our calculated lifetimes for the state 2p 5 ZPI/2 for Fluorine-like Mg IV and Fe XVIII are 5.03 s and 51.7 gs respectively which are in excellent accord with corresponding values 5.00 s and 51.0 gs calculated by using sophisticated configuration interaction wavefunctions within the Breit-Pauli approximation. Our calculated value of lifetime for Thalium-like Pb II is 40.0ms which is in good accord with the experimental value of 41.2 ms. New results are presented for the highly ionized ions in the Al-like and Cl-like isoelectronic sequences. The present analysis can be exploited for all the ions in the isoelectronic sequences of elements of groups III A, III B VII A of the periodic table.

Experimental M1 Transition Rates of Coronal Lines from Arx, Arxiv, and Arxv

“…The interest in the transitions studied here is reÑected in the number of published calculations (for B-like ions, e.g., Krueger & Czyzak 1966 ;Cheng, Kim, & Desclaux 1979 ;Oboladze & Safronova 1980 ;Vajed-Samii, Ton-That, & Armstrong 1981 ;Froese Fischer 1983 ;Kaufman & Sugar 1986 ;Bhatia, Feldman, & Seely 1986a ;Verhey, Das, & Perger 1987 ;Baluja & Agrawal 1995 ;Galavis, Mendoza, & Zeippen 1998 ; for F-like ions Krueger & Czyzak 1966 ;Cheng et al 1979 ;Oboladze & Safronova 1980 ;Kaufman & Sugar 1986 ;Sampson, Zhang, & Fontes 1991 ;Bhatia 1994 ;Baluja & Agrawal 1995 ; and for Be-like ions Krueger & Czyzak 1966 ;Oboladze & Safronova 1980 ;Anderson & Anderson 1982 ;Glass 1983 ;Kaufman & Sugar 1986 ;Bhatia, Feldman, & Seely 1986b ;Idrees & Das 1989 ;Safronova, Johnson, & Derevianko 1999). There also are calculations that implicitly use the transition rate information for spectral modeling.…”

Wavelengths and transition rates fornl–n′l′ transitions in Be-, B-, Mg-, Al-, Ca-, Zn-, Ag- and Yb-like tungsten ions

“…The largest number of studies exist for Be-like isoelectronic sequence . Number of works studied the properties of B-like ions [27][28][29][30][31][32][33][34][35][36][37][38][39][40], Mg-like ions [41][42][43][44][45][46][47][48], Al-like ions [49][50][51][52][53][54][55][56] and Zn-like ions [57][58][59][60][61][62][63][64][65][66][67]. Only few papers were devoted to the studies of Ca-, Ag-and Yb-like ion [68][69][70][71][72][73] properties.…”