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Measurements and simulations of the responses of the cluster Ge detectors to $$gamma$$ rays

Hara, Kaoru; Goko, Shinji*; Harada, Hideo   ; Hirose, Kentaro  ; Kimura, Atsushi   ; Kin, Tadahiro*; Kitatani, Fumito  ; Koizumi, Mitsuo ; Nakamura, Shoji  ; Toh, Yosuke   

For a pulse-height weighting technique, responses of two cluster Ge detectors with BGO anti-coincidence detectors have been measured at the Accurate Neutron-Nucleus Reaction Measurement Instrument (ANNRI) in the Japan Proton Accelerator Research Complex (J-PARC). $$^{60}$$Co and $$^{137}$$Cs standard sources were used for low-energy region (E$$_{gamma}$$ $$<$$ 2 MeV). Prompt $$gamma$$-rays emitted from the $$^{35}$$Cl(n,$$gamma$$)$$^{36}$$Cl reactions were used for high-energy region (E$$_{gamma}$$ $$sim$$ 8 MeV). The measured spectra, peak efficiencies, and peak-to-total ratio were compared to simulations which were calculated by using the EGS5 code in the energy range 0.5-10 MeV. The response function will be applied to a data analysis in neutron capture reaction measurements at ANNRI.



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