Measurement of the scintillation time spectra and pulse-shape discrimination of low-energy beta and nuclear recoils in liquid argon with DEAP-1
The DEAP-1 low-background liquid argon detector has been used to measure scintillation pulse shapes of beta decays and nuclear recoil events and to demonstrate the feasibility of pulse-shape discrimination down to an electron-equivalent energy of 20 keVee. The relative intensities of singlet/triplet...
| Autores principales: | , , , , , , , , , , , , , , , , , , , |
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| Formato: | Journal article |
| Publicado: |
2009
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| _version_ | 1826292598270066688 |
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| author | Boulay, MG Cai, B Chen, M Golovko, V Harvey, P Mathew, R Lidgard, J McDonald, AB Pasuthip, P Pollman, T Skensved, P Graham, K Hallin, A McKinsey, D Lippincott, W Nikkel, J Jillings, C Duncan, F Cleveland, B Lawson, I |
| author_facet | Boulay, MG Cai, B Chen, M Golovko, V Harvey, P Mathew, R Lidgard, J McDonald, AB Pasuthip, P Pollman, T Skensved, P Graham, K Hallin, A McKinsey, D Lippincott, W Nikkel, J Jillings, C Duncan, F Cleveland, B Lawson, I |
| author_sort | Boulay, MG |
| collection | OXFORD |
| description | The DEAP-1 low-background liquid argon detector has been used to measure scintillation pulse shapes of beta decays and nuclear recoil events and to demonstrate the feasibility of pulse-shape discrimination down to an electron-equivalent energy of 20 keVee. The relative intensities of singlet/triplet states in liquid argon have been measured as a function of energy between 15 and 500 keVee for both beta and nuclear recoils. Using a triple-coincidence tag we find the fraction of beta events that are mis-identified as nuclear recoils to be less than 6x10^{-8} between 43-86 keVee and that the discrimination parameter agrees with a simple analytic model. The discrimination measurement is currently limited by nuclear recoils induced by cosmic-ray generated neutrons, and is expected to improve by operating the detector underground at SNOLAB. The analytic model predicts a beta mis-identification fraction of 10^{-10} for an electron-equivalent energy threshold of 20 keVee. This reduction allows for a sensitive search for spin-independent scattering of WIMPs from 1000 kg of liquid argon with a WIMP-nucleon cross-section sensitivity of 10^{-46} cm^{2}. |
| first_indexed | 2024-03-07T03:17:10Z |
| format | Journal article |
| id | oxford-uuid:b6325c8c-6ea8-4ffb-85b6-c7b13c910704 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T03:17:10Z |
| publishDate | 2009 |
| record_format | dspace |
| spelling | oxford-uuid:b6325c8c-6ea8-4ffb-85b6-c7b13c9107042022-03-27T04:39:12ZMeasurement of the scintillation time spectra and pulse-shape discrimination of low-energy beta and nuclear recoils in liquid argon with DEAP-1Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:b6325c8c-6ea8-4ffb-85b6-c7b13c910704Symplectic Elements at Oxford2009Boulay, MGCai, BChen, MGolovko, VHarvey, PMathew, RLidgard, JMcDonald, ABPasuthip, PPollman, TSkensved, PGraham, KHallin, AMcKinsey, DLippincott, WNikkel, JJillings, CDuncan, FCleveland, BLawson, IThe DEAP-1 low-background liquid argon detector has been used to measure scintillation pulse shapes of beta decays and nuclear recoil events and to demonstrate the feasibility of pulse-shape discrimination down to an electron-equivalent energy of 20 keVee. The relative intensities of singlet/triplet states in liquid argon have been measured as a function of energy between 15 and 500 keVee for both beta and nuclear recoils. Using a triple-coincidence tag we find the fraction of beta events that are mis-identified as nuclear recoils to be less than 6x10^{-8} between 43-86 keVee and that the discrimination parameter agrees with a simple analytic model. The discrimination measurement is currently limited by nuclear recoils induced by cosmic-ray generated neutrons, and is expected to improve by operating the detector underground at SNOLAB. The analytic model predicts a beta mis-identification fraction of 10^{-10} for an electron-equivalent energy threshold of 20 keVee. This reduction allows for a sensitive search for spin-independent scattering of WIMPs from 1000 kg of liquid argon with a WIMP-nucleon cross-section sensitivity of 10^{-46} cm^{2}. |
| spellingShingle | Boulay, MG Cai, B Chen, M Golovko, V Harvey, P Mathew, R Lidgard, J McDonald, AB Pasuthip, P Pollman, T Skensved, P Graham, K Hallin, A McKinsey, D Lippincott, W Nikkel, J Jillings, C Duncan, F Cleveland, B Lawson, I Measurement of the scintillation time spectra and pulse-shape discrimination of low-energy beta and nuclear recoils in liquid argon with DEAP-1 |
| title | Measurement of the scintillation time spectra and pulse-shape
discrimination of low-energy beta and nuclear recoils in liquid argon with
DEAP-1 |
| title_full | Measurement of the scintillation time spectra and pulse-shape
discrimination of low-energy beta and nuclear recoils in liquid argon with
DEAP-1 |
| title_fullStr | Measurement of the scintillation time spectra and pulse-shape
discrimination of low-energy beta and nuclear recoils in liquid argon with
DEAP-1 |
| title_full_unstemmed | Measurement of the scintillation time spectra and pulse-shape
discrimination of low-energy beta and nuclear recoils in liquid argon with
DEAP-1 |
| title_short | Measurement of the scintillation time spectra and pulse-shape
discrimination of low-energy beta and nuclear recoils in liquid argon with
DEAP-1 |
| title_sort | measurement of the scintillation time spectra and pulse shape discrimination of low energy beta and nuclear recoils in liquid argon with deap 1 |
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