Physics – Nuclear Physics
Scientific paper
Jun 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1238..234k&link_type=abstract
TOURS SYMPOSIUM ON NUCLEAR PHYSICS AND ASTROPHYSICS-VII. AIP Conference Proceedings, Volume 1238, pp. 234-236 (2010).
Physics
Nuclear Physics
Neutron Sources, Radioactive Sources, Resonance Reactions And Scattering, Nuclear, Giant Resonances, Statistical Models, Neutron Sources, X- And Gamma-Ray Sources, Mirrors, Gratings, And Detectors, Resonance Reactions, Giant Resonances, Thermal And Statistical Models
Scientific paper
Photoneutron cross sections were measured for 117Sn and 116Sn near neutron thresholds with quasi-monochromatic laser Compton scattering γ-rays. The measured cross sections for 117Sn and 116Sn are strongly enhanced from the threshold behavior expected for L = 1 neutron emissions after E1 photoexcitation. This suggests the presence of extra γ-ray strength in the low-energy tail of the giant dipole resonance. The present cross sections were analyzed together with radiative neutron capture cross sections for 116Sn within the framework of the statistical model calculation. It is shown that the extra γ-ray strength can be interpreted as pygmy E1 resonance which was previously reported in the nuclear resonance fluorescence experiment for 116Sn and 124Sn.
Akimune Hidetoshi
Goriely Stephane
Itoh O.
Iwamoto C.
Kamata Masaru
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