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 187Re crystalline compound. The experiment has been carried out with an array of eight AgReO4 thermal detectors operating at a temperature of 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 187Re Beta decay spectrum is crucial for future experiments aiming at the precise calorimetric measurement of the antineutrino mass

Arnaboldi, C., Benedek, G., Brofferio, C., Capelli, S., Capozzi, F., Cremonesi, O., et al. (2006). Measurements of the p to s Wave Branching Ratio of 187Re Beta Decay from Beta Environmental Fine Structure. PHYSICAL REVIEW LETTERS, 96(4) [10.1103/PhysRevLett.96.042503].

Measurements of the p to s Wave Branching Ratio of 187Re Beta Decay from Beta Environmental Fine Structure

BENEDEK, GIORGIO;BROFFERIO, CHIARA;CAPELLI, SILVIA;Cremonesi, O;FIORINI, ETTORE;NUCCIOTTI, ANGELO ENRICO LODOVICO;PAVAN, MAURA;Pessina, G;Previtali, E;SISTI, MONICA
2006

Abstract

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 187Re crystalline compound. The experiment has been carried out with an array of eight AgReO4 thermal detectors operating at a temperature of 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 187Re Beta decay spectrum is crucial for future experiments aiming at the precise calorimetric measurement of the antineutrino mass
Articolo in rivista - Articolo scientifico
Beta Decay, XAFS, Neutrino Mass
S wave; 187Re
English
2006
96
4
042503
none
Arnaboldi, C., Benedek, G., Brofferio, C., Capelli, S., Capozzi, F., Cremonesi, O., et al. (2006). Measurements of the p to s Wave Branching Ratio of 187Re Beta Decay from Beta Environmental Fine Structure. PHYSICAL REVIEW LETTERS, 96(4) [10.1103/PhysRevLett.96.042503].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/2404
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