Measurement of the quenching and channeling effects in a CsI crystal used for a WIMP search

J. H. Lee , G. B. Kim , I. S. Seong , B. H. Kim , J. H. Kim , J. Li , J. W. Park , J. K. Lee

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K. W. Kim H. Bhang S. C. Kim Seonho Choi J. H. Choi H. W. Joo S. J. Lee S. L. Olsen S. S. Myung S. K. Kim Y. D. Kim W. G. Kang J. H. So H. J. Kim H. S. Lee I. S. Hahn D. S. Leonard Y. J. Li Q. Yue X. R. Li

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classification ⚛️ physics.ins-det astro-ph.IMhep-ex

keywords channelingeffectsquenchingcrystalmeasuredscintillationsearchused

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We have studied channeling effects in a Cesium Iodide (CsI) crystal that is similar in composition to the ones being used in a search for Weakly Interacting Massive Particles (WIMPs) dark matter candidates, and measured its energy-dependent quenching factor, the relative scintillation yield for electron and nuclear recoils. The experimental results are reproduced with a GEANT4 simulation that includes a model of the scintillation efficiency as a function of electronic stopping power. We present the measured and simulated quenching factors and the estimated effects of channeling.

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Measurement of the quenching and channeling effects in a CsI crystal used for a WIMP search

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