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

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arxiv 1502.03800 v1 pith:OF26T5I2 submitted 2015-02-12 physics.ins-det astro-ph.IMhep-ex

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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