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Title: The Majorana Demonstrator Status and Preliminary Results

Abstract

The MAJORANA Collaboration is using an array of high-purity Ge detectors to search for neutrinoless double-beta decay in 76Ge. Searches for neutrinoless double-beta decay are understood to be the only viable experimental method for testing the Majorana nature of the neutrino. Observation of this decay would imply violation of lepton number, that neutrinos are Majorana in nature, and provide information on the neutrino mass. The MAJORANA DEMONSTRATOR comprises 44.1 kg of p-type point-contact Ge detectors (29.7 kg enriched in 76Ge) surrounded by a low-background shield system. The experiment achieved a high efficiency of converting raw Ge material to detectors and an unprecedented detector energy resolution of 2.5 keV FWHM at Q ββ. The MAJORANA collaboration began taking physics data in 2016. Here, this paper summarizes key construction aspects of the Demonstrator and shows preliminary results from initial data.

Authors:
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Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); National Science Foundation (NSF); Russian Foundation for Basic Research; Natural Sciences and Engineering Research Council of Canada (NSERC)
Contributing Org.:
Majorana Collaboration
OSTI Identifier:
1455001
Report Number(s):
LA-UR-18-22409
Journal ID: ISSN 2100-014X
Grant/Contract Number:
AC52-06NA25396; AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
EPJ Web of Conferences
Additional Journal Information:
Journal Volume: 178; Conference: The 16th International Symposium on Capture-Gamma Ray Spectrum and Related Topics, Shanghai (China), 18-22 Sep 2017; Journal ID: ISSN 2100-014X
Publisher:
EDP Sciences
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Atomic and Nuclear Physics; Majorana Demonstrator; double beta decay; low background experiment; underground experiment

Citation Formats

Yu, C. -H., Alvis, S. I., Arnquist, I. J., Avignone, F. T., Barabash, A. S., Barton, C. J., Bertrand, F. E., Bode, T., Brudanin, V., Busch, M., Buuck, M., Caldwell, T. S., Chan, Y. -D., Christofferson, C. D., Chu, P. -H., Cuesta, C., Detwiler, J. A., Dunagan, C., Efremenko, Yu, Ejiri, H., Elliott, S. R., Gilliss, T., Giovanetti, G. K., Green, M., Gruszko, J., Guinn, I. S., Guiseppe, V. E., Haufe, C. R., Hehn, L., Henning, R., Hoppe, E. W., Howe, M. A., Keeter, K. J., Kidd, M. F., Konovalov, S. I., Kouzes, R. T., Lopez, A. M., Martin, R. D., Massarczyk, R., Meijer, S. J., Mertens, S., Myslik, J., Othman, G., Pettus, W., Poon, A. W. P., Radford, D. C., Rager, J., Reine, A. L., Rielage, K., Ruof, N. W., Shanks, B., Shirchenko, M., Suriano, A. M., Tedeschi, D., Varner, R. L., Vasilyev, S., Vetter, K., Vorren, K., White, B. R., Wilkerson, J. F., Wiseman, C., Xu, W., Yakushev, E., Yumatov, V., Zhitnikov, I., Zhu, B. Z., and Sun, Yang. The Majorana Demonstrator Status and Preliminary Results. United States: N. p., 2018. Web. doi:10.1051/epjconf/201817801006.
Yu, C. -H., Alvis, S. I., Arnquist, I. J., Avignone, F. T., Barabash, A. S., Barton, C. J., Bertrand, F. E., Bode, T., Brudanin, V., Busch, M., Buuck, M., Caldwell, T. S., Chan, Y. -D., Christofferson, C. D., Chu, P. -H., Cuesta, C., Detwiler, J. A., Dunagan, C., Efremenko, Yu, Ejiri, H., Elliott, S. R., Gilliss, T., Giovanetti, G. K., Green, M., Gruszko, J., Guinn, I. S., Guiseppe, V. E., Haufe, C. R., Hehn, L., Henning, R., Hoppe, E. W., Howe, M. A., Keeter, K. J., Kidd, M. F., Konovalov, S. I., Kouzes, R. T., Lopez, A. M., Martin, R. D., Massarczyk, R., Meijer, S. J., Mertens, S., Myslik, J., Othman, G., Pettus, W., Poon, A. W. P., Radford, D. C., Rager, J., Reine, A. L., Rielage, K., Ruof, N. W., Shanks, B., Shirchenko, M., Suriano, A. M., Tedeschi, D., Varner, R. L., Vasilyev, S., Vetter, K., Vorren, K., White, B. R., Wilkerson, J. F., Wiseman, C., Xu, W., Yakushev, E., Yumatov, V., Zhitnikov, I., Zhu, B. Z., & Sun, Yang. The Majorana Demonstrator Status and Preliminary Results. United States. doi:10.1051/epjconf/201817801006.
Yu, C. -H., Alvis, S. I., Arnquist, I. J., Avignone, F. T., Barabash, A. S., Barton, C. J., Bertrand, F. E., Bode, T., Brudanin, V., Busch, M., Buuck, M., Caldwell, T. S., Chan, Y. -D., Christofferson, C. D., Chu, P. -H., Cuesta, C., Detwiler, J. A., Dunagan, C., Efremenko, Yu, Ejiri, H., Elliott, S. R., Gilliss, T., Giovanetti, G. K., Green, M., Gruszko, J., Guinn, I. S., Guiseppe, V. E., Haufe, C. R., Hehn, L., Henning, R., Hoppe, E. W., Howe, M. A., Keeter, K. J., Kidd, M. F., Konovalov, S. I., Kouzes, R. T., Lopez, A. M., Martin, R. D., Massarczyk, R., Meijer, S. J., Mertens, S., Myslik, J., Othman, G., Pettus, W., Poon, A. W. P., Radford, D. C., Rager, J., Reine, A. L., Rielage, K., Ruof, N. W., Shanks, B., Shirchenko, M., Suriano, A. M., Tedeschi, D., Varner, R. L., Vasilyev, S., Vetter, K., Vorren, K., White, B. R., Wilkerson, J. F., Wiseman, C., Xu, W., Yakushev, E., Yumatov, V., Zhitnikov, I., Zhu, B. Z., and Sun, Yang. Mon . "The Majorana Demonstrator Status and Preliminary Results". United States. doi:10.1051/epjconf/201817801006. https://www.osti.gov/servlets/purl/1455001.
@article{osti_1455001,
title = {The Majorana Demonstrator Status and Preliminary Results},
author = {Yu, C. -H. and Alvis, S. I. and Arnquist, I. J. and Avignone, F. T. and Barabash, A. S. and Barton, C. J. and Bertrand, F. E. and Bode, T. and Brudanin, V. and Busch, M. and Buuck, M. and Caldwell, T. S. and Chan, Y. -D. and Christofferson, C. D. and Chu, P. -H. and Cuesta, C. and Detwiler, J. A. and Dunagan, C. and Efremenko, Yu and Ejiri, H. and Elliott, S. R. and Gilliss, T. and Giovanetti, G. K. and Green, M. and Gruszko, J. and Guinn, I. S. and Guiseppe, V. E. and Haufe, C. R. and Hehn, L. and Henning, R. and Hoppe, E. W. and Howe, M. A. and Keeter, K. J. and Kidd, M. F. and Konovalov, S. I. and Kouzes, R. T. and Lopez, A. M. and Martin, R. D. and Massarczyk, R. and Meijer, S. J. and Mertens, S. and Myslik, J. and Othman, G. and Pettus, W. and Poon, A. W. P. and Radford, D. C. and Rager, J. and Reine, A. L. and Rielage, K. and Ruof, N. W. and Shanks, B. and Shirchenko, M. and Suriano, A. M. and Tedeschi, D. and Varner, R. L. and Vasilyev, S. and Vetter, K. and Vorren, K. and White, B. R. and Wilkerson, J. F. and Wiseman, C. and Xu, W. and Yakushev, E. and Yumatov, V. and Zhitnikov, I. and Zhu, B. Z. and Sun, Yang},
abstractNote = {The MAJORANA Collaboration is using an array of high-purity Ge detectors to search for neutrinoless double-beta decay in 76Ge. Searches for neutrinoless double-beta decay are understood to be the only viable experimental method for testing the Majorana nature of the neutrino. Observation of this decay would imply violation of lepton number, that neutrinos are Majorana in nature, and provide information on the neutrino mass. The MAJORANA DEMONSTRATOR comprises 44.1 kg of p-type point-contact Ge detectors (29.7 kg enriched in 76Ge) surrounded by a low-background shield system. The experiment achieved a high efficiency of converting raw Ge material to detectors and an unprecedented detector energy resolution of 2.5 keV FWHM at Qββ. The MAJORANA collaboration began taking physics data in 2016. Here, this paper summarizes key construction aspects of the Demonstrator and shows preliminary results from initial data.},
doi = {10.1051/epjconf/201817801006},
journal = {EPJ Web of Conferences},
number = ,
volume = 178,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2018},
month = {Mon Jan 01 00:00:00 EST 2018}
}

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