Cooled BGO array detector for experiments at JUNA

Not scheduled
Kunibiki Messe (Matsue)

Kunibiki Messe


Poster Contribution


Dr Jun Su (China Institute of Atomic Energy)


Jinping Underground lab for Nuclear Astrophysics (JUNA) is designed to directly measure the cross-sections of crucial reactions during the evolution of hydrostatic stars. The extremely low cross-sections of radiative capture reactions within their relevant Gamow peaks require a gamma detector with high detection efficiency. For this reason, we have constructed a 4π BGO array detector composed of eight crystals with a length of 250 mm and a radial thickness of 63 mm. In order to improve the energy resolution of the BGO array detector, all the crystals are cooled to -20 degrees Celsius. An energy resolution <11% is observed for the 661 keV gamma ray.

Primary author

Dr Jun Su (China Institute of Atomic Energy)

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