Recent Advances in the Calculation of Oscillator Strengths

Abstract

A review of work published since the last beam-foil spectroscopy conference in Gatlinburg (1975) is presented. For allowed transitions where LS coupling is valid, the NCMET and FOTOS schemes are compared and an extension of the application of FOTOS is proposed. Where relativistic effects are important–for medium to heavy atoms and for forbidden transitions–the stability of coefficients in configuration interaction expansions, and the way in which the Breit or Breit-Pauli terms are introduced, are discussed.

Spectroscopic Study and Lifetime Measurement of the $6d7p$ $ ^{3}F_{2}^{o}$ state of radium

“…3: An example of the behavior of the fit function as the probe beam power is increased. This example is shown for the 712 nm probe transition, which has an oscillator strength f ik = 0.32 (12).…”

“…Precise measurements of oscillator strengths and the branching ratios provide effective tests of atomic structure calculations, especially where electron correlation effects [11] and relativistic corrections [12] are important. They are also important for atomic parity nonconservation searches in the unified electro-weak theories [13].…”

Electronic structure for the configurations nd k+1(n+1)s0(n+1)p1, nd k(n+1)s1(n+1)p1, and nd k−1(n+1)s2(n+1)p1 (k=1 to 10) in the first and second row of transition metals

“…Coefficients of Slater integrals were computed using Saxena's program, 12 which is a modified version of that of Hibbert. 13 The calculations have been carried out for the lower states of the first and second row of transition metals and for the three possible configurations; nd kϩ1 (nϩ1)s 0 (nϩ1)p 1 , nd k (nϩ1)s 1 (nϩ1)p 1 , and nd kϪ1 (nϩ1)s 2 (nϩ1)p 1 , that we will refer to in the text as S0, S1, and S2, respectively. Some configurations admit only one LS term as a consequence of the values ⌬E͑LS͒ϭ0 and E av ϭE͑LS͒.…”