Programs in Physics & Physical Chemistry
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|Manuscript Title: A program to calculate internal conversion coefficients including higher-order corrections for all atomic shells.|
|Authors: R. Der, D. Hinneburg, M. Nagel|
|Program title: INTERNAL CONVERSION COEFFICIENTS|
|Catalogue identifier: AAMB_v1_0|
Distribution format: gz
|Journal reference: Comput. Phys. Commun. 18(1979)401|
|Programming language: Fortran.|
|Computer: ES 1040.|
|Operating system: OS/ES.|
|RAM: 282K words|
|Word size: 8|
|Keywords: Nuclear physics, Atomic shell, Internal conversion Coefficient, Electronic bridge, Transition probability, Gamma emission, Dirac equation, Activity detection.|
Nature of problem:
The internal conversion coefficients (ICC) including higher-order corrections are calculated for all atomic shells by solving the Dirac equation numerically for a given atomic potential.
The coupled radial Dirac equations are solved by inward-outward integration for the discrete spectrum, and by outward integration for the continuum.
The finite size of the nucleus (homogeneously charged sphere) is accounted for in the solution of the Dirac equation. However, contributions from inside the nucleus to the conversion matrix elements are neglected as well as dynamic effects of the nuclear structure.
In distinction from the program CATAR, which accounts for the dynamic effects of the nuclear structure as well as particle parameters, our program includes the calculation of the higher-order corrections for all atomic shells according to Krutov. These corrections turn out be relevant especially to the probability of the gamma emission.
The test case consisting of the subshell 3p1/2 of 99Tcm (2.17KeV;E3) requires 79 s to compile and 279 s to run on the ES 1040.
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