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Report No.

Photonuclear reaction cross sections of Cl-37 and Sm-152

Hara, Kaoru; Harada, Hideo   ; Kitatani, Fumito  ; Goko, Shinji*; Hohara, Shinya*; Kaihori, Takeshi*; Makinaga, Ayano*; Utsunomiya, Hiroaki*; Toyokawa, Hiroyuki*; Watanabe, Yukinobu*

Neutron capture cross sections of the unstable nuclei $$^{36}$$Cl (t$$_{1/2}$$=3.0$$times$$10$$^{5}$$ yr) and $$^{151}$$Sm (t$$_{1/2}$$=90 yr) are the fundamental data for the nuclear transmutation. The cross sections of the inverse $$^{37}$$Cl($$gamma$$,n)$$^{36}$$Cl and $$^{152} $$Sm($$gamma$$,n)$$^{151}$$Sm reaction were measured with the laser-Compton scattering (LCS) $$gamma$$ rays at 10.4-12.0 MeV and 8.3-12.4 MeV, respectively. Quasi-monochromatic beams of LCS photons irradiated a natural NaCl sample and an enriched $$^{152}$$Sm$$_2$$O$$_3$$ sample. The emitted neutrons were detected with a 4$$pi$$ neutron detector. The energy distribution of LCS $$gamma$$ beam was measured with a 120 $$%$$ Ge detector or the high-resolution high-energy photon spectrometer (HHS). The present data for $$^{37}$$Cl, $$^{152}$$Sm, and $$^{197}$$Au are compared with the previous data compiled in the IAEA document and the calculation with a nuclear reaction code TALYS.



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