First measurement of discrimination between helium and electron recoils in liquid xenon for low-mass dark matter searches
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arXiv
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| Format: | Preprint |
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2023
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| _version_ | 1866910378224517120 |
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| author | Haselschwardt, S. J. Gibbons, R. Chen, H. Kravitz, S. Manalaysay, A. Xia, Q. Sorensen, P. Lippincott, W. H. |
| author_facet | Haselschwardt, S. J. Gibbons, R. Chen, H. Kravitz, S. Manalaysay, A. Xia, Q. Sorensen, P. Lippincott, W. H. |
| contents | We report the first measurement of discrimination between low-energy helium recoils and electron recoils in liquid xenon. This result is relevant to proposed low-mass dark matter searches which seek to dissolve light target nuclei in the active volume of liquid-xenon time projection chambers. Low-energy helium recoils were produced by degrading $α$ particles from $^{210}$Po with a gold foil situated on the cathode of a liquid xenon time-projection chamber. The resulting population of helium recoil events is well separated from electron recoils and is also offset from the expected position of xenon nuclear recoil events. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2308_02430 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | First measurement of discrimination between helium and electron recoils in liquid xenon for low-mass dark matter searches Haselschwardt, S. J. Gibbons, R. Chen, H. Kravitz, S. Manalaysay, A. Xia, Q. Sorensen, P. Lippincott, W. H. High Energy Physics - Experiment Nuclear Experiment We report the first measurement of discrimination between low-energy helium recoils and electron recoils in liquid xenon. This result is relevant to proposed low-mass dark matter searches which seek to dissolve light target nuclei in the active volume of liquid-xenon time projection chambers. Low-energy helium recoils were produced by degrading $α$ particles from $^{210}$Po with a gold foil situated on the cathode of a liquid xenon time-projection chamber. The resulting population of helium recoil events is well separated from electron recoils and is also offset from the expected position of xenon nuclear recoil events. |
| title | First measurement of discrimination between helium and electron recoils in liquid xenon for low-mass dark matter searches |
| topic | High Energy Physics - Experiment Nuclear Experiment |
| url | https://arxiv.org/abs/2308.02430 |