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A Study of the Helium 31D-->21P-->11S Cascade with Algebraic Computing

J. B. Wang
Organization: The University of Western Australia
Department: Physics
J. Williams
Journal / Anthology

Computer Physics Communications
Year: 1993
Volume: 75
Page range: 275-282

Coincidence intensities of the cascade decay 31D-->21P-->11S of helium excited by electron impact are computed using the symbolic manipulation package Mathematica. The formulation requires the calculation of a few thousand Clebsch--Gordan coefficients and rotation matrices, which would be extremely tedious to carry out by hand. A scheme is presented as an illustrative example of a lengthy and cumbersome calculation handled by Mathematica with ease.

*Science > Physics > Nuclear and Particle Physics