THE INTERNATIONAL GERMANIUM EXPERIMENT (IGEX) IN 1993

被引：7

作者：

AVIGNONE, FT

BRODZINSKI, RL

COLLAR, JI

COURANT, H

GARCIA, E

GUERARD, CK

HENSLEY, WK

KIRPICHNIKOV, IV

KLIMENKO, AA

MORALES, A

MORALES, J

MILEY, HS

NUNEZLAGOS, R

OSETROV, SB

POGOSOV, VS

POMANSKY, AA

PUIMEDON, J

REEVES, JH

RUDDICK, K

SAENZ, C

SALINAS, A

SARSA, ML

SMOLNIKOV, AA

STAROSTIN, AS

TAMANYAN, AG

UMATOV, VI

VASILIEV, SI

VILLAR, JA

机构：

[1] UNIV S CAROLINA, COLUMBIA, SC 29208 USA

[2] PACIFIC NW LAB, RICHLAND, WA 99352 USA

[3] INST THEORET & EXPTL PHYS, 117259 MOSCOW, RUSSIA

[4] UNIV MINNESOTA, MINNEAPOLIS, MN 55455 USA

[5] BAKSAN NEUTRINO OBSERV, INST NUCL RES, 361609 NEUTRINO, RUSSIA

[6] UNIV ZARAGOZA, ZARAGOZA, SPAIN

[7] YEREVAN PHYS INST, 375036 YEREVAN, ARMENIA

[8] KURCHATOV INST ATOM ENERGY, 142092 MOSCOW, RUSSIA

来源：

NUCLEAR PHYSICS B | 1994年

关键词：

D O I：

10.1016/0920-5632(94)90275-5

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 data collected from the first set of three IGEX enriched germanium detectors have been analyzed. The best background obtained was less than 0.3 counts/keV/kg/y near 2 MeV, obtained in the Homestake gold mine in Lead, SD, USA. Data combined from all the detectors yield T1/2(0nu) less-than-or-equal-to 1.0 X 10(24)y (90% CL). The first detector produced in the second phase of the experiment is a 2.15 kg germanium crystal of 2.16 keV FWHM at 1332 keV. Several experiences with the first group of detectors have led to improvements in the mechanical design of the copper cryostat. Also, low background materials research done in the last two years has lowered the specific activity of the electroformed copper. The new detector is currently operating in the Homestake gold mine.

引用

页码：354 / 357

页数：4

共 8 条

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