The Majorana Demonstrator radioassay program
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The Majorana Demonstrator radioassay program

N. Abgrall,I.J. Arnquist,F.T. Avignone,H.O. Back,A.S. Barabash,F.E. Bertrand,M. Boswell,A.W. Bradley,V. Brudanin,M. Busch,M. Buuck,D. Byram,A.S. Caldwell,Y.-D. Chan,C.D. Christofferson,P.-H. Chu,Clara Cuesta,J.A. Detwiler,J.A. Dunmore,Yu. Efremenko,H. Ejiri,Steven R. Elliott,P. Finnerty,A. Galindo-Uribarri,V.M. Gehman,T. Gilliss,G.K. Giovanetti,J. Goett,M.P. Green,Julieta Gruszko,I.S. Guinn,V.E. Guiseppe,R. Henning,E.W. Hoppe,S. Howard,M.A. Howe,B.R. Jasinski,R.A. Johnson,K.J. Keeter,M.F. Kidd,O. Kochetov,S.I. Konovalov,R.T. Kouzes,B.D. Laferriere,J. Leon,J.C. Loach,J. MacMullin,S. MacMullin,R.D. Martin,R. Massarczyk,S. Meijer,S. Mertens,M.L. Miller,John L. Orrell,C. O'shaughnessy,N. R. Overman,A.W.P. Poon,K. Pushkin,D.C. Radford,J. Rager,Keith Rielage,R.G.H. Robertson,E. Romero-Romero,M.C. Ronquest,A.G. Schubert,B. Shanks,M. Shirchenko,K.J. Snavely,N. Snyder,D. Steele,A.M. Suriano,D. Tedeschi,J.E. Trimble,R.L. Varner,S. Vasilyev,K. Vetter,K. Vorren,B.R. White,J.F. Wilkerson,C. Wiseman,Wenqin Xu,Evgeny Yakushev,C.-H. Yu,V. Yumatov,I. Zhitnikov,Pinghan Chu;N. Abgrall;I.J. Arnquist;F.T. Avignone;H.O. Back;A.S. Barabash;F.E. Bertrand;M. Boswell;A.W. Bradley;V. Brudanin;M. Busch;M. Buuck;D. Byram;A.S. Caldwell;Y.-D. Chan;C.D. Christofferson;P.-H. Chu;Clara Cuesta;J.A. Detwiler;J.A. Dunmore;Yu. Efremenko;H. Ejiri;Steven R. Elliott;P. Finnerty;A. Galindo-Uribarri;V.M. Gehman;T. Gilliss;G.K. Giovanetti;J. Goett;M.P. Green;Julieta Gruszko;I.S. Guinn;V.E. Guiseppe;R. Henning;E.W. Hoppe;S. Howard;M.A. Howe;B.R. Jasinski;R.A. Johnson;K.J. Keeter;M.F. Kidd;O. Kochetov;S.I. Konovalov;R.T. Kouzes;B.D. Laferriere;J. Leon;J.C. Loach;J. MacMullin;S. MacMullin;R.D. Martin;R. Massarczyk;S. Meijer;S. Mertens;M.L. Miller;John L. Orrell;C. O'shaughnessy;N. R. Overman;A.W.P. Poon;K. Pushkin;D.C. Radford;J. Rager;Keith Rielage;R.G.H. Robertson;E. Romero-Romero;M.C. Ronquest;A.G. Schubert;B. Shanks;M. Shirchenko;K.J. Snavely;N. Snyder;D. Steele;A.M. Suriano;D. Tedeschi;J.E. Trimble;R.L. Varner;S. Vasilyev;K. Vetter;K. Vorren;B.R. White;J.F. Wilkerson;C. Wiseman;Wenqin Xu;Evgeny Yakushev;C.-H. Yu;V. Yumatov;I. Zhitnikov;Pinghan Chu;
nuclear instruments and methods in physics research section a: accelerators, spectrometers, detectors and associated equipment 2016 Vol. 828 pp. 22-36
201
chu2016nuclearthe

Abstract

The Majorana collaboration is constructing the Majorana Demonstrator at the Sanford Underground Research Facility at the Homestake gold mine, in Lead, SD. The apparatus will use Ge detectors, enriched in isotope 76Ge, to demonstrate the feasibility of a large-scale Ge detector experiment to search for neutrinoless double beta decay. The long half-life of this postulated process requires that the apparatus be extremely low in radioactive isotopes whose decays may produce backgrounds to the search. The radioassay program conducted by the collaboration to ensure that the materials comprising the apparatus are sufficiently pure is described. The resulting measurements from gamma-ray counting, neutron activation and mass spectroscopy of the radioactive-isotope contamination for the materials studied for use in the detector are reported. We interpret these numbers in the context of the expected background for the experiment.

Keywords

Mass spectrometry mass spectroscopy background double beta decay majorana radiopurity trace analysis neutron activation analysis germanium counting low

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DOI:
10.1016/j.nima.2016.04.070
URL:
https://sciprofiles.com/publication/view/05251ec43...

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