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Low-energy enhancement and fluctuations of gamma-ray strength functions in Fe-56,Fe-57: test of the Brink-Axel hypothesis

Larsen, A C; Guttormsen, M; Blasi, N; Bracco, A; Camera, F; Campo, L Crespo; Eriksen, Tomas; Görgen, A; Hagen, T W; Ingeberg, V W; Kheswa, B V


Nuclear level densities and gamma-ray strength functions of Fe-56,Fe-57 have been extracted from proton-gamma coincidences. A low-energy enhancement in the gamma-ray strength functions up to a factor of 30 over common theoretical E1 models is confirmed. Angular distributions of the low-energy enhancement in 57Fe indicate its dipole nature, in agreement with findings for Fe-56. The high statistics and the excellent energy resolution of the large-volume LaBr3(Ce) detectors allowed for a thorough...[Show more]

CollectionsANU Research Publications
Date published: 2017
Type: Journal article
Source: Journal of Physics G: Nuclear and Particle Physics
DOI: 10.1088/1361-6471/aa644a


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