The Majorana Demonstrator: A Search for Neutrinoless Double-beta Decay of Germanium-76


Journal Article

The observation of neutrino less double-beta decay would show that neutrinos are Majorana particles and provide information on neutrino mass. Attaining sensitivities for neutrino masses in the inverted hierarchy region requires large, tonne scale detectors with extremely low backgrounds, at the level of 10-3 counts keV-1 t-1 y-1 or lower in the region of the signal. The MAJORANA collaboration is constructing the DEMONSTRATOR, an array consisting of 40 kg of p-type point contact germanium detectors, at least half of which will be enriched to 86% in 76Ge. The primary aim is to show the feasibility for a future tonne scale measurement. With a sub-keV energy threshold, the array should also be able to search for light WIMP dark matter. This paper presents a brief update on the status of constructing the DEMONSTRATOR including an electroforming facility that is now operating underground at the Sanford Underground Research Facility.

Full Text

Duke Authors

Cited Authors

  • Wilkerson, JF; Aguayo, E; Avignone, FT; Back, HO; Barabash, AS; Beene, JR; Bergevin, M; Bertrand, FE; Boswell, M; Brudanin, V; Busch, M; Chan, YD; Christofferson, CD; Collar, JI; Combs, DC; Cooper, RJ; Detwiler, JA; Doe, PJ; Efremenko, Y; Egorov, V; Ejiri, H; Elliott, SR; Esterline, J; Fast, JE; Fields, N; Finnerty, P; Fraenkle, FM; Gehman, VM; Giovanetti, GK; Green, MP; Guiseppe, VE; Gusey, K; Hallin, AL; Hazama, R; Henning, R; Hoppe, EW; Horton, M; Howard, S; Howe, MA; Johnson, RA; Keeter, KJ; Keller, C; Kidd, MF; Knecht, A; Kochetov, O; Konovalov, SI; Kouzes, RT; Laferriere, BD; LaRoque, BH; Leon, J; Leviner, LE; Loach, JC; MacMullin, S; Marino, MG; Martin, RD; Mei, DM; Merriman, JH; Miller, ML; Mizouni, L; Nomachi, M; Orrell, JL; Overman, NR; Phillips, DG; Poon, AWP; Perumpilly, G; Prior, G; Radford, DC; Rielage, K; Robertson, RGH; Ronquest, MC; Schubert, AG; Shima, T; Shirchenko, M; Snavely, KJ; Steele, D; Strain, J; Thomas, K; Timkin, V; Tornow, W; Vanyushin, I; Varner, RL; Vetter, K; Vorren, K; Yakushev, E; Young, AR; Yu, CH; Yumatov, V; Zhang, C

Published Date

  • January 1, 2012

Published In

Volume / Issue

  • 375 / PART 4

Electronic International Standard Serial Number (EISSN)

  • 1742-6596

International Standard Serial Number (ISSN)

  • 1742-6588

Digital Object Identifier (DOI)

  • 10.1088/1742-6596/375/1/042010

Citation Source

  • Scopus