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Production Rate Measurement of Tritium and Other Cosmogenic Isotopes in Germanium with CDMSlite

Agnese, R. and Aralis, T. and Chang, Y.-Y. and Cornell, B. and Golwala, S. R. (2019) Production Rate Measurement of Tritium and Other Cosmogenic Isotopes in Germanium with CDMSlite. Astroparticle Physics, 104 . pp. 1-12. ISSN 0927-6505. http://resolver.caltech.edu/CaltechAUTHORS:20180814-110030986

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Abstract

Future direct searches for low-mass dark matter particles with germanium detectors, such as SuperCDMS SNOLAB, are expected to be limited by backgrounds from radioactive isotopes activated by cosmogenic radiation inside the germanium. There are limited experimental data available to constrain production rates and a large spread of theoretical predictions. We examine the calculation of expected production rates, and analyze data from the second run of the CDMS low ionization threshold experiment (CDMSlite) to estimate the rates for several isotopes. We model the measured CDMSlite spectrum and fit for contributions from tritium and other isotopes. Using the knowledge of the detector history, these results are converted to cosmogenic production rates at sea level. The production rates in atoms/(kg · day) are 74  ±  9 for ^3H, 1.5  ±  0.7 for ^(55)Fe, 17  ±  5 for ^(65)Zn, and 30  ±  18 for ^(68)Ge.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1016/j.astropartphys.2018.08.006DOIArticle
https://arxiv.org/abs/1806.07043arXivDiscussion Paper
ORCID:
AuthorORCID
Chang, Y.-Y.0000-0002-6441-980X
Golwala, S. R.0000-0002-1098-7174
Additional Information:© 2018 Published by Elsevier B.V. Received 18 June 2018, Revised 7 August 2018, Accepted 12 August 2018, Available online 14 August 2018. The SuperCDMS collaboration gratefully acknowledges technical assistance from the staff of the Soudan Underground Laboratory and the Minnesota Department of Natural Resources. The iZIP detectors were fabricated in the Stanford Nanofabrication Facility, which is a member of the National Nanofabrication Infrastructure Network, sponsored and supported by the NSF. Funding and support were received from the National Science Foundation, the U.S. Department of Energy, Fermilab URA Visiting Scholar Grant No. 15-S-33, NSERC Canada, the Canada First Research Excellence Fund, and MultiDark (Spanish MINECO). This document was prepared by the SuperCDMS collaboration using the resources of the Fermi National Accelerator Laboratory (Fermilab), a U.S. Department of Energy, Office of Science, HEP User Facility. Fermilab is managed by Fermi Research Alliance, LLC (FRA), acting under Contract No. DE-AC02-07CH11359. Pacific Northwest National Laboratory is operated by Battelle Memorial Institute under Contract No. DE-AC05-76RL01830 for the U.S. Department of Energy. SLAC is operated under Contract No. DEAC02-76SF00515 with the U.S. Department of Energy.
Funders:
Funding AgencyGrant Number
NSFUNSPECIFIED
Department of Energy (DOE)DE-AC02-07CH11359
Fermilab15-S-33
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
Canada First Research Excellence FundUNSPECIFIED
MultiDarkUNSPECIFIED
Ministerio de Economía, Industria y Competitividad (MINECO)UNSPECIFIED
Department of Energy (DOE)DE-AC05-76RL01830
Department of Energy (DOE)DE-AC02-76SF00515
Subject Keywords:Dark Matter; SuperCDMS; CDMSlite; Germanium Detectors; Cosmogenic Activation
Record Number:CaltechAUTHORS:20180814-110030986
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20180814-110030986
Official Citation:R. Agnese, T. Aralis, T. Aramaki, I.J. Arnquist, E. Azadbakht, W. Baker, S. Banik, D. Barker, D.A. Bauer, T. Binder, M.A. Bowles, P.L. Brink, R. Bunker, B. Cabrera, R. Calkins, C. Cartaro, D.G. Cerdeño, Y.-Y. Chang, J. Cooley, B. Cornell, P. Cushman, T. Doughty, E. Fascione, E. Figueroa-Feliciano, C.W. Fink, M. Fritts, G. Gerbier, R. Germond, M. Ghaith, S.R. Golwala, H.R. Harris, Z. Hong, E.W. Hoppe, L. Hsu, M.E. Huber, V. Iyer, D. Jardin, A. Jastram, C. Jena, M.H. Kelsey, A. Kennedy, A. Kubik, N.A. Kurinsky, R.E. Lawrence, B. Loer, E. Lopez Asamar, P. Lukens, D. MacDonell, R. Mahapatra, V. Mandic, N. Mast, E. Miller, N. Mirabolfathi, B. Mohanty, J.D. Morales Mendoza, J. Nelson, J.L. Orrell, S.M. Oser, W.A. Page, R. Partridge, M. Pepin, F. Ponce, S. Poudel, M. Pyle, H. Qiu, W. Rau, A. Reisetter, R. Ren, T. Reynolds, A. Roberts, A.E. Robinson, H.E. Rogers, T. Saab, B. Sadoulet, J. Sander, A. Scarff, R.W. Schnee, S. Scorza, K. Senapati, B. Serfass, D. Speller, M. Stein, J. Street, H.A. Tanaka, D. Toback, R. Underwood, A.N. Villano, B. von Krosigk, S.L. Watkins, J.S. Wilson, M.J. Wilson, J. Winchell, D.H. Wright, S. Yellin, B.A. Young, X. Zhang, X. Zhao, Production rate measurement of Tritium and other cosmogenic isotopes in Germanium with CDMSlite, Astroparticle Physics, Volume 104, 2019, Pages 1-12, ISSN 0927-6505, https://doi.org/10.1016/j.astropartphys.2018.08.006. (http://www.sciencedirect.com/science/article/pii/S0927650518301774)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:88795
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:15 Aug 2018 14:13
Last Modified:29 Aug 2018 18:09

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