Performances of a large mass ZnSe bolometer to search for rare events

被引：79

作者：

Beeman, J. W. ^{[1
]}

Bellini, F. ^{[2
,3
]}

Cardani, L. ^{[2
,3
]}

Casali, N. ^{[4
,5
]}

Dafinei, I. ^{[3
]}

Di Domizio, S. ^{[8
]}

Ferroni, F. ^{[2
,3
]}

Gironi, L. ^{[6
,7
]}

Giuliani, A. ^{[9
]}

Nagorny, S. ^{[5
]}

Orio, F. ^{[3
]}

Pattavina, L. ^{[5
]}

Pessina, G. ^{[7
]}

Piperno, G. ^{[2
,3
]}

Pirro, S. ^{[7
]}

Previtali, E. ^{[7
]}

Rusconi, C. ^{[7
]}

Tomei, C. ^{[3
]}

Vignati, M. ^{[3
]}

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[2] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy

[3] Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy

[4] Univ Aquila, Dipartimento Sci Fis & Chim, I-67100 Coppito, AQ, Italy

[5] Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, I-67010 Assergi, AQ, Italy

[6] Univ Milano Bicocca, Dipartimento Fis, I-20126 Milan, Italy

[7] Ist Nazl Fis Nucl, Sez Milano Bicocca, I-20126 Milan, Italy

[8] Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy

[9] Ctr Spectrometrie Nucl & Spectrometrie Masse, F-91405 Orsay, France

来源：

JOURNAL OF INSTRUMENTATION | 2013年 / 8卷

关键词：

Double-beta decay detectors; Dark Matter detectors (WIMPs; axions; etc.); Particle identification methods; Calorimeters; LIGHT DETECTORS; CUORICINO; ZNMOO4; SIGNALS; CUORE; ARRAY;

D O I：

10.1088/1748-0221/8/05/P05021

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Scintillating bolometers of ZnSe are the baseline choice of the LUCIFER experiment, whose aim is to observe the neutrinoless double beta decay of Se-82. The independent read-out of the heat and scintillation signals allows to identify and reject alpha particle interactions, the dominant background source for bolometric detectors. In this paper we report the performances of a ZnSe crystal operated within the LUCIFER R&D. We measured the scintillation yield, the energy resolution and the background in the energy region where the signal from 0 nu DBD decay of Se-82 is expected with an exposure of 9.4kg.days. With a newly developed analysis algorithm we improved the rejection of alpha events, and we estimated the increase in energy resolution obtained by the combination of the heat and light signals. For the first time we measured the light emitted by nuclear recoils, and found it to be compatible with zero. We conclude that the discrimination of nuclear recoils from beta/gamma interactions in the WIMPs energy region is possible, but low-noise light detectors are needed.

引用

页数：18

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