Production, characterization and operation of 76Ge enriched BEGe detectors in GERDA

被引：0

作者：

Agostini, M. ^{[16
,17
]}

Allardt, M. ^{[4
]}

Andreotti, E. ^{[6
,20
]}

Bakalyarov, A. M. ^{[14
]}

Balata, M. ^{[1
,2
]}

Barabanov, I. ^{[12
]}

Barros, N. ^{[4
]}

Baudis, L. ^{[21
]}

Bauer, C. ^{[7
]}

Becerici-Schmidt, N. ^{[15
]}

Bellotti, E. ^{[8
,9
]}

Belogurov, S. ^{[12
,13
]}

Belyaev, S. T. ^{[14
]}

Benato, G. ^{[21
]}

Bettini, A. ^{[18
,19
]}

Bezrukov, L. ^{[12
]}

Bode, T. ^{[16
,17
]}

Borowicz, D. ^{[3
,5
]}

Brudanin, V. ^{[5
]}

Brugnera, R. ^{[18
,19
]}

Budjas, D. ^{[16
,17
]}

Caldwell, A. ^{[15
]}

Cattadori, C. ^{[9
]}

Chernogorov, A. ^{[13
]}

D'Andrea, V. ^{[1
,2
]}

Demidova, E. V. ^{[13
]}

Domula, A. ^{[4
]}

Egorov, V. ^{[5
]}

Falkenstein, R. ^{[20
]}

Freund, K. ^{[20
]}

Frodyma, N. ^{[3
]}

Gangapshev, A. ^{[7
,12
]}

Garfagnini, A. ^{[18
,19
]}

Gotti, C. ^{[9
,23
]}

Grabmayr, P. ^{[20
]}

Gurentsov, V. ^{[12
]}

Gusev, K. ^{[5
,14
,16
,17
]}

Hegai, A. ^{[20
]}

Heisel, M. ^{[7
]}

Hemmer, S. ^{[18
,19
]}

Heusser, G. ^{[7
]}

Hofmann, W. ^{[7
]}

Hult, M. ^{[6
]}

Inzhechik, L. V. ^{[12
,24
]}

Ioannucci, L. ^{[1
,2
]}

Csathy, J. Janicsko ^{[16
,17
]}

Jochum, J. ^{[20
]}

Junker, M. ^{[1
,2
]}

Kazalov, V. ^{[12
]}

Kihm, T. ^{[7
]}

机构：

[1] Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, Assergi, Italy

[2] Gran Sasso Sci Inst, Assergi, Italy

[3] Jagiellonian Univ, Inst Phys, Krakow, Poland

[4] Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany

[5] Joint Inst Nucl Res, Dubna, Russia

[6] Inst Reference Mat & Measurements, Geel, Belgium

[7] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany

[8] Univ Milano Bicocca, Dipartimento Fis, Milan, Italy

[9] INFN Milano Bicocca, Milan, Italy

[10] Univ Milan, Dipartimento Fis, Milan, Italy

[11] INFN Milano, Milan, Italy

[12] Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia

[13] Inst Theoret & Expt Phys, Moscow 117259, Russia

[14] Natl Res Ctr, Kurchatov Inst, Moscow, Russia

[15] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

[16] Tech Univ Munich, Dept Phys, D-80290 Munich, Germany

[17] Tech Univ Munich, Excellence Cluster Universe, D-80290 Munich, Germany

[18] Univ Padua, Dipartimento Fis & Astron, Padua, Italy

[19] INFN Padova, Padua, Italy

[20] Univ Tubingen, Inst Phys, Tubingen, Germany

[21] Univ Zurich, Inst Phys, Zurich, Switzerland

[22] Ist Nazl Fis Nucl, Lab Nazl Sud, I-95129 Catania, Italy

[23] Univ Florence, Florence, Italy

[24] Moscow Inst Phys & Technol, Moscow, Russia

[25] Int Univ Nat Soc & Man Dubna, Dubna, Russia

来源：

EUROPEAN PHYSICAL JOURNAL C | 2015年 / 75卷 / 02期

基金：

瑞士国家科学基金会; 俄罗斯基础研究基金会;

关键词：

COSMOGENIC ACTIVATION; GERMANIUM; DECAY;

D O I：

10.1140/epjc/s10052-014-3253-0

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The GERmanium Detector Array (Gerda) at the Gran Sasso Underground Laboratory (LNGS) searches for the neutrinoless double beta decay (0 nu beta beta) of Ge-76. Germanium detectors made of material with an enriched Ge-76 fraction act simultaneously as sources and detectors for this decay. During Phase I of the experiment mainly refurbished semi-coaxial Ge detectors from former experiments were used. For the upcoming Phase II, 30 new Ge-76 enriched detectors of broad energy germanium (BEGe)-type were produced. A subgroup of these detectors has already been deployed in Gerda during Phase I. The present paper reviews the complete production chain of these BEGe detectors including isotopic enrichment, purification, crystal growth and diode production. The efforts in optimizing the mass yield and in minimizing the exposure of the Ge-76 enriched germanium to cosmic radiation during processing are described. Furthermore, characterization measurements in vacuum cryostats of the first subgroup of seven BEGe detectors and their long-term behavior in liquid argon are discussed. The detector performance fulfills the requirements needed for the physics goals of Gerda Phase II.

引用

页数：22

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