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Photoneutron cross sections for $$^{118-124}$$Sn and the $$gamma$$-ray strength function method

Utsunomiya, Hiroaki*; Goriely, S.*; Kamata, Masaki*; Akimune, Hidetoshi*; Kondo, Takeo*; Ito, Osamu*; Iwamoto, Chihiro*; Yamagata, Tamio*; Toyokawa, Hiroyuki*; Lui, Y.-W.*; Harada, Hideo ; Kitatani, Fumito; Goko, Shinji*; Hilaire, S.*; Koning, A.*

Photoneutron cross sections were measured for $$^{118}$$Sn, $$^{119}$$Sn, $$^{120}$$Sn, $$^{122}$$Sn, and $$^{124}$$Sn near neutron threshold with quasi-monochromatic laser-Compton scattering $$gamma$$-rays. A systematic analysis of the present photoneutron data and existing neutron-capture data is made using the $$gamma$$-ray strength function on the basis of the HFB+QRPA model of E1 strength supplemented with a pygmy dipole resonance, which was deduced from a previous study on $$^{116}$$Sn and $$^{117}$$Sn. Radiative neutron capture cross sections for two radioactive nuclei, $$^{121}$$Sn and $$^{123}$$Sn, are deduced through the $$gamma$$-ray strength function method.

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Category:Physics, Nuclear

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