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, 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
TL;DR
This study investigates how channeling effects influence scintillation in CsI crystals used for WIMP dark matter detection, providing experimental measurements and simulations of quenching factors and channeling impacts.
Contribution
It offers the first detailed measurement and simulation of quenching and channeling effects in CsI crystals relevant for dark matter searches.
Findings
Measured energy-dependent quenching factors in CsI.
Simulated channeling effects align with experimental data.
Quantified the impact of channeling on scintillation yield.
Abstract
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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