Characteristics of signals originating near the lithium-diffused N+ contact of high purity germanium p-type point contact detectors


Journal Article

© 2012 A study of signals originating near the lithium-diffused n+ contact of p-type point contact (PPC) high purity germanium detectors (HPGe) is presented. The transition region between the active germanium and the fully dead layer of the n+ contact is examined. Energy depositions in this transition region are shown to result in partial charge collection. This provides a mechanism for events with a well defined energy to contribute to the continuum of the energy spectrum at lower energies. A novel technique to quantify the contribution from this source of background is introduced. Experiments that operate germanium detectors with a very low energy threshold may benefit from the methods presented herein.

Full Text

Duke Authors

Cited Authors

  • Aguayo, E; Amman, M; Avignone, FT; Barabash, AS; Barton, PJ; Beene, JR; 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; Galindo-Uribarri, A; 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; Kidd, MF; Knecht, A; Kochetov, O; Konovalov, SI; Kouzes, RT; LaFerriere, BD; Leon, J; Leviner, LE; Loach, JC; Looker, Q; Luke, PN; MacMullin, S; Marino, MG; Martin, RD; Merriman, JH; Miller, ML; Mizouni, L; Nomachi, M; Orrell, JL; Overman, NR; Perumpilly, G; Phillips, DG; Poon, AWP; Radford, DC; Rielage, K; Robertson, RGH; Ronquest, MC; Schubert, AG; Shima, T; Shirchenko, M; Snavely, KJ; Steele, D; Strain, J; Timkin, V; Tornow, W; Varner, RL; Vetter, K; Vorren, K; Wilkerson, JF; Yakushev, E; Yaver, H; Young, AR; Yu, CH; Yumatov, V

Published Date

  • February 11, 2013

Published In

Volume / Issue

  • 701 /

Start / End Page

  • 176 - 185

International Standard Serial Number (ISSN)

  • 0168-9002

Digital Object Identifier (DOI)

  • 10.1016/j.nima.2012.11.004

Citation Source

  • Scopus