Physics
Scientific paper
Jun 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003cgrs.conf..258i&link_type=abstract
CAPTURE GAMMA-RAY SPECTROSCOPY AND RELATED TOPICS. Proceedings of the Eleventh International Symposium. Held 2-6 September 2002
Physics
Scientific paper
To investigate the origin of the anomalous bump or shoulder observed in the γ-ray energy region from 1.5 to 3.5 MeV in the keV-neutron capture γ-ray spectra of lanthanide nuclides, the spectra of 145Nd, 161Dy, and 167Er were analyzed with the statistical model calculation from the viewpoint of the M1 scissors mode excitation, assuming the Brink hypothesis for the excitation. The values of B(M1) for the excitation were derived from the analysis, and the derived values were in good agreement with those derived from the (γ, γ') reactions. From this agreement, the anomalous bump or shoulder in the keV-neutron capture γ-ray spectra of lanthanide nuclides may be ascribed to the M1 scissors mode excitation if we can assume the Brink hypothesis for the M1 scissors mode excitation.
Igashira Masayuki
Kawasaki Masahiro
Ohsaki Toshiro
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