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Report No.

Measurement of neutron capture cross section of Li-7 at J-PARC/MLF/ANNRI

Makii, Hiroyuki   ; Segawa, Mariko   ; Ota, Shuya*; Kimura, Atsushi   ; Nishinaka, Ichiro; Nishio, Katsuhisa   ; Harada, Hideo   

The neutron capture cross section of light elements, such as Li, Be, and B, plays an important role in inhomogeneous Big-Bang nucleosynthesis scenarios or in explosive nucleosynthesis, like r-process. However, data for neutron capture reaction of light elements sparse and / or disagree in the astrophysical relevant energy region, since the cross section of light elements is quite small even at the thermal energy. Intense pulsed neutron beam provided by the Material and Life science experimental Facility (MLF) in J-PARC and high performance Ge spectrometer, which is the main detector of the Accurate Neutron-Nucleus Reaction Measurement Instrument (ANNRI) installed at Beam Line No. 04 of MLF in the J-PARC, will allow us to study neutron capture reaction of light elements. At first we have measured the neutron capture cross section of Li-7 at the MLF in the J-PARC. In this contribution, we will present the results of the measurement.



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