${}^{83}\mathrm{Rb}$/${}^{83m}\mathrm{Kr}$ production and cross-section measurement with 3.4 MeV and 20 MeV proton beams

Abstract

${}^{83m}\mathrm{Kr}$, with a short lifetime, is an ideal calibration source for liquid xenon or liquid argon detectors. The ${}^{83m}\mathrm{Kr}$ isomer can be generated through the decay of ${}^{83}\mathrm{Rb}$ isotope which is usually produced by proton beams bombarding natural krypton atoms. In this paper, we report a successful production of ${}^{83}\mathrm{Rb}{/}^{83m}\mathrm{Kr}$ with a proton beam energy of 3.4 MeV, and the first measurement of the production rate with such low energy proton beams. Another production attempt is performed using the newly available 20 MeV proton beam in China, and the measured production rate is consistent with previous measurements. The produced ${}^{83m}\mathrm{Kr}$ source has been successfully injected into the PandaX-II liquid xenon detector, yielding enough statistics for detector calibration.

arXiv comment9 pages, 8 figures, version published on PRC

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• Search for Solar Boosted Dark Matter Particles at the PandaX-4T Experiment