The Majorana Demonstrator: Progress towards showing the feasibility of a tonne-scale 76Ge neutrinoless double-beta decay experiment

Autor: Aguayo, E., Finnerty, P., Loach, J.C., Robertson, R.G.H., Wilkerson, J.F., Varner, R.L., Boswell, M., Leon, J., Brudanin, V., Vorren, K., Ronquest, M.C., Hoppe, E.W., Christofferson, C.D., Shima, T., Chan, Y.-D., Fields, N., Galindo-Uribarri, A., Keeter, K.J., Kochetov, O., Merriman, J.H., Knecht, A., Timkin, V., Miller, M.L., Phillips, D.G., Guiseppe, V.E., Hazma, R., Radford, D.C., Barton, P.J., Ejiri, H., Hallin, A.L., MacMullin, S., Howe, M.A., Strain, J., Elliott, S.R., Perumpilly, G., Luke, P.N., Avignone, F.T., III, Amman, M., Giovanetti, G.K., Schubert, A.G., Young, A.R., Combs, D.C., Collar, J.I., Fraenkle, F.M., Yakushev, E., Shirchenko, M., Detwiler, J.A., Cooper, R.J., Gehman, V.M., Efremenko, Y., Konovalov, S.I., Mizouni, L., Orrell, J.L., Leviner, L.E., Horton, M., Poon, A.W.P., Vetter, K., Henning, R., Tornow, W., Rielage, K., Bertrand, F.E., Beene, J.R., LaFerriere, B.D., Busch, M., Johnson, R.A., Marino, M.G., Fast, J.E., Martin, R.D., Barabash, A.S., Kidd, M.F., Esterline, J., Yumatov, V., Green, M.P., Yaver, H., Snavely, K.J., Doe, P.J., Yu, C.-H., Egorov, V., Kouzes, R.T., Gusey, K., Nomachi, M., Overman, N.R., Steele, D., Howard, S.
Jazyk: angličtina
Rok vydání: 2014
DOI: 10.17615/pp7e-ss28
Popis: The Majorana Demonstrator will search for the neutrinoless double-beta decay (0vββ) of the 76Ge isotope with a mixed array of enriched and natural germanium detectors. The observation of this rare decay would indicate the neutrino is its own anti-particle, demonstrate that lepton number is not conserved, and provide information on the absolute mass-scale of the neutrino. The Demonstrator is being assembled at the 4850 foot level of the Sanford Underground Research Facility in Lead, South Dakota. The array will be contained in a low-background environment and surrounded by passive and active shielding. The goals for the Demonstrator are: demonstrating a background rate less than 3 t-1 y-1 in the 4 keV region of interest (ROI) surrounding the 2039 keV 76Ge endpoint energy; establishing the technology required to build a tonne-scale germanium based double-beta decay experiment; testing the recent claim of observation of 0vββ [1]; and performing a direct search for light WIMPs (3-10 GeV/c2).
Databáze: OpenAIRE