Measurement of the p to s wave branching ratio of 187Re β decay from beta environmental fine structure -: art. no. 042503

被引：27

作者：

Arnaboldi, C ^{[1
]}

Benedek, G

Brofferio, C

Capelli, S

Capozzi, F

Cremonesi, O

Filipponi, A

Fiorini, E

Giuliani, A

Monfardini, A

Nucciotti, A

Pavan, M

Pedretti, M

Pessina, G

Pirro, S

Previtali, E

Sisti, M

机构：

[1] Univ Milano Bicocca, Dept Fis, Milan, Italy

[2] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy

[3] Univ Milano Bicocca, Dipartimento Sci Mat, Milan, Italy

[4] Univ Aquila, Dipartimento Fis, I-67010 Coppito, AQ, Italy

[5] Univ Insubria, Dipartimento Fis, Como, Italy

[6] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy

[7] IRST, ITC, Povo, TN, Italy

[8] Ist Nazl Fis Nucl, Grp Collegato Trento, Povo, TN, Italy

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.96.042503

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The mixed occurrence of s-wave and p-wave contributions in a first forbidden unique Gamow-Teller beta decay has been investigated for the first time by measuring the beta environmental fine structure (BEFS) in a Re-187 crystalline compound. The experiment has been carried out with an array of eight AgReO4 thermal detectors operating at a temperature of similar to 100 mK. A fit of the observed BEFS spectrum indicates the p-wave electron emission as the dominant channel. The complete understanding of the BEFS distortion of the Re-187 beta decay spectrum is crucial for future experiments aiming at the precise calorimetric measurement of the antineutrino mass.

引用

页数：4

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