Simultaneous Measurement of Ionization and Scintillation from Nuclear Recoils in Liquid Xenon for a Dark Matter Experiment
Journal Article
·
· Physical Review Letters
- Physics Department and Columbia Astrophysics Laboratory, Columbia University, New York, New York 10027 (United States)
- Department of Physics, Princeton University, Princeton, New Jersey 08540 (United States)
- Department of Physics, Brown University, Providence, Rhode Island 02912 (United States)
- Department of Physics, Case Western Reserve University, Cleveland, Ohio 44106 (United States)
We report the first measurements of the absolute ionization yield of nuclear recoils in liquid xenon, as a function of energy and electric field. Independent experiments were carried out with two dual-phase time-projection chamber prototypes, developed for the XENON dark matter project. We find that the charge yield increases with decreasing recoil energy, and exhibits only a weak field dependence. These results are the first unambiguous demonstration of the capability of dual-phase xenon detectors to discriminate between electron and nuclear recoils down to 20 keV, a key requirement for a sensitive dark matter search.
- OSTI ID:
- 20860707
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 8 Vol. 97; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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