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This paper considers low energy photon-neutron reactions, where the reaction proceeds through compound nucleus states. The reaction channel is defined by the set of quantum numbers. The differential cross-section is formed by quadratic terms and interference terms of varying spin values. This can be simplified when quadrupole excitations can be neglected, and when the spacing of the excited states is such that a single level is excited at a time. Experimental angular distributions can be interpreted in an unambiguous way only in the case of isolated excited levels where the compound nucleus model is fully verified. After a detailed theoretical analysis, the principles of the experimental method are outlined.

Additional information

Authors: COCEVA C, JRC Geel (BE)
Bibliographic Reference: Paper presented: VI International School on Neutron Physics, Alushta (SU), Oct. 8-19, 1990
Availability: Available from (1) as Paper EN 35839 ORA
Record Number: 199011889 / Last updated on: 1994-12-02
Original language: en
Available languages: en