https://doi.org/10.1051/epjconf/202532207004
Semi-classical treatment of photon cascades in nuclei
1 Lawrence Berkeley Berkeley Laboratory, Berkeley, California 94720, USA
2 Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen Ø, Denmark
* e-mail: JRandrup@LBL.gov
Published online: 14 March 2025
A simple semi-classical treatment of photon cascades in nuclei has been developed. The basic assumption is that a nucleus with a classical spin vector J can be represented by the maximally aligned quantum state J, M=J with the quantization axis being the spin direction J/J. It is furthermore assumed that a photon emission yields a daughter state of a similar form, J′, M′ = J′ , but with its alignment direction having been modified as a consequence of the angular momentum recoil. The overall good quality of the treatment is illustrated for a variety of E1 and E2 two-photon cascades having non-trivial angular correlations. The method is suitable for use in nuclear fission simulation codes, making it possible to address photon-photon correlation observables quantitatively.
© The Authors, published by EDP Sciences, 2025
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