Measurement and control of the Bi-214 contamination in the beta beta NEMO-2 experiment

被引:9
作者
Arnold, R
Augier, C
Barabash, A
Blum, D
Brudanin, V
Campagne, JE
Dassie, D
Egorov, V
Eschbach, R
Guyonnet, JL
Hubert, F
Hubert, P
Jullian, S
Kisel, I
Kochetov, O
Kornoukov, VN
Kovalenko, V
Lalanne, D
Laplanche, F
Leccia, F
Linck, I
Longuemare, C
Mauger, F
Mennrath, P
Nicholson, HW
Nozdrin, A
Piquemal, F
Purtov, O
Reyss, JL
Scheibling, F
Suhonen, J
Sutton, CS
Szklarz, G
Tretyak, VI
Umatov, V
Vanushin, I
Vareille, A
Vasilyev, Y
Vylov, T
Zerkin, V
机构
[1] INST SCI MAT & RAYONNEMENT,LPC,IN2P3,CNRS,F-14050 CAEN,FRANCE
[2] UNIV CAEN,F-14050 CAEN,FRANCE
[3] UNIV BORDEAUX,F-33170 GRADIGNAN,FRANCE
[4] CENBG,IN2P3,CNRS,F-33170 GRADIGNAN,FRANCE
[5] JOINT INST NUCL RES DUBNA,DUBNA,RUSSIA
[6] ITEP,MOSCOW,RUSSIA
[7] UNIV PARIS 11,F-91405 ORSAY,FRANCE
[8] CNRS,INST NATL PHYS NUCL & PHYS PARTICULES,ACCELERATEUR LINEAIRE LAB,F-91405 ORSAY,FRANCE
[9] UNIV STRASBOURG 1,F-67037 STRASBOURG,FRANCE
[10] CNRS,IN2P3,IRES,F-67037 STRASBOURG,FRANCE
[11] MT HOLYOKE COLL,S HADLEY,MA 01075
[12] INR,KIEV,UKRAINE
[13] CNRS,CFR,F-91190 GIF SUR YVETTE,FRANCE
[14] UNIV JYVASKYLA,SF-40351 JYVASKYLA,FINLAND
关键词
D O I
10.1016/S0168-9002(97)01013-9
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
In the double beta decay (beta beta) experiment NEMO-2, the Bi-214 radioactivity has been measured as background for the beta beta processes, The analysis of the Bi-214 contamination has been performed via the signature of Po-214 alpha decay. This method has been applied to data taken with enriched Mo-100 and Cd-116 sources. At the level of NEMO-2's sensitivity, in a 1.0 mole yr study of enriched material, the contamination of the sources can be measured in the range of 2.0 mBq kg(-1). The effects of deposited contamination by Rn-222 are also discussed and estimated at the level of 0.3 mBq per square meter of source foil, Backgrounds for neutrinoless double beta decay (beta beta 0v) are deduced from these measurements and the consequences for the higher sensitivity beta beta experiment NEMO-3 are drawn.
引用
收藏
页码:144 / 155
页数:12
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