Provider: National Science Library - National Research Council Canada / BibliothĂ¨que scientifique nationale - Conseil national de recherches Canada
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TY - JOUR
TI - Oscillator strengths and radiative decay rates for spin-changing S-P transitions in helium: Finite nuclear mass effects
DO - 10.1088/0953-4075/48/23/235001
AU - Morton, Donald C.
AU - Schulhoff, Eva E.
AU - Drake, G. W. F.
T2 - Journal of Physics B: Atomic, Molecular and Optical Physics
SN - 0953-4075
VL - 48
IS - 23
SP - 235001
KW - Magnetic moments
KW - Anomalous magnetic moment of the electrons
KW - Nuclear mass
KW - Oscillator strengths
KW - Pseudo-state expansion
KW - Radiative decay rates
KW - Relativistic effects
KW - Spontaneous decay rates
KW - Transition operators
KW - Helium
AB - We have calculated the electric dipole (E1) and magnetic quadrupole (M2) oscillator strengths and spontaneous decay rates for 24 spin-changing transitions of atomic helium. We included the effects of the finite nuclear mass and the anomalous magnetic moment of the electron augmented by the recently derived Pachucki term. The specific transitions for 4He are and with and for For the E1 calculations we used the Breit approximation and pseudostate expansions to perform the perturbation sums over intermediate states in both the length and velocity gauge as a check on both numerical accuracy and validity of the transition operators. The corrections for the nuclear mass and the electron anomaly tend to cancel, indicating that if one is included, then so should be the other. The tables give mass- and anomaly-dependent coefficients permitting the easy generation of results for the other isotopes of helium.
PY - 2015
DA - 2015/10/06
PB - IOP Publishing
LA - eng
C1 - Collection / Collection : NRC Publications Archive / Archives des publications du CNRC
C2 - Record identifier / Identificateur de lâ€™enregistrement : 5eecff8f-ad1d-4349-8e74-4d36781724d4
ER -