Performance of a large TeO2 crystal as a cryogenic bolometer in searching for neutrinoless double beta decay - INSPIRE

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Performance of a large TeO2 crystal as a cryogenic bolometer in searching for neutrinoless double beta decay

L. Cardani
(
- INFN, Rome
)
,
L. Gironi
(
- Milan Bicocca U. and
- INFN, Milan Bicocca
)
,
J.W. Beeman
(
- LBL, Berkeley
)
,
I. Dafinei
(
- INFN, Rome
)
,
Z. Ge
(
- SIAS, USTC
)

Jun, 2011

6 pages

Published in:

JINST 7 (2012) P01020

e-Print:

1106.0568 [nucl-ex]

DOI:

10.1088/1748-0221/7/01/P01020

View in:

ADS Abstract Service

reference search13 citations

Citations per year

Abstract: (arXiv)

Bolometers are ideal devices in the search for neutrinoless Double Beta Decay. Enlarging the mass of individual detectors would simplify the construction of a large experiment, but would also decrease the background per unit mass induced by alpha-emitters located close to the surfaces and background arising from external and internal gamma's. We present the very promising results obtained with a 2.13 kg TeO2 crystal. This bolometer, cooled down to a temperature of 10.5 mK in a dilution refrigerator located deep underground in the Gran Sasso National Laboratories, represents the largest thermal detector ever operated. The detector exhibited an energy resolution spanning a range from 3.9 keV (at 145 keV) to 7.8 keV (at the 2615 gamma-line of 208Tl) FWHM. We discuss the decrease in the background per unit mass that can be achieved increasing the mass of a bolometer.

Note:

6 pages, 6 figures

29.30.Kv
07.20.Mc
29.40.Vj
29.30.Ev
double-beta decay: (0neutrino)
bolometer: crystal
tellurium: oxygen
cryogenics
calibration
energy resolution

References(18)

Figures(0)

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