Scintillation response of cryogenic CsI to few-keV and sub-keV nuclear recoils
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866908704393134080 |
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| author | Collar, J. I. Lewis, C. M. Simón, A. Yoon, S. G. |
| author_facet | Collar, J. I. Lewis, C. M. Simón, A. Yoon, S. G. |
| contents | Monochromatic neutron emissions from photonuclear sources $^{88}$Y/Be and $^{124}$Sb/Be are employed to obtain the response of pure (undoped) cesium iodide at 80 K. The use of a low-noise, high-quantum-efficiency avalanche photodiode in combination with a novel waveshifter results in a 70 eV analysis threshold. This reach allows to observe signals from sub-keV nuclear recoils originating in neutron scattering. The extracted quenching factor drops much faster towards low energy than the extrapolation of a model developed for room-temperature CsI[Na]. We comment on the impact of our measurement on planned use of cryogenic CsI in neutrino physics and dark matter experiments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_09820 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Scintillation response of cryogenic CsI to few-keV and sub-keV nuclear recoils Collar, J. I. Lewis, C. M. Simón, A. Yoon, S. G. Instrumentation and Detectors High Energy Physics - Experiment High Energy Physics - Phenomenology Nuclear Experiment Monochromatic neutron emissions from photonuclear sources $^{88}$Y/Be and $^{124}$Sb/Be are employed to obtain the response of pure (undoped) cesium iodide at 80 K. The use of a low-noise, high-quantum-efficiency avalanche photodiode in combination with a novel waveshifter results in a 70 eV analysis threshold. This reach allows to observe signals from sub-keV nuclear recoils originating in neutron scattering. The extracted quenching factor drops much faster towards low energy than the extrapolation of a model developed for room-temperature CsI[Na]. We comment on the impact of our measurement on planned use of cryogenic CsI in neutrino physics and dark matter experiments. |
| title | Scintillation response of cryogenic CsI to few-keV and sub-keV nuclear recoils |
| topic | Instrumentation and Detectors High Energy Physics - Experiment High Energy Physics - Phenomenology Nuclear Experiment |
| url | https://arxiv.org/abs/2512.09820 |