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Title: Measurement of the p to s Wave Branching Ratio of {sup 187}Re {beta} Decay from Beta Environmental Fine Structure

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 {sup 187}Re crystalline compound. The experiment has been carried out with an array of eight AgReO{sub 4} thermal detectors operating at a temperature of {approx}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 {sup 187}Re {beta} decay spectrum is crucial for future experiments aiming at the precise calorimetric measurement of the antineutrino mass.

Authors:
; ; ; ; ; ; ; ; ; ; ;  [1];  [2];  [3]; ;  [4];  [5]
  1. Dipartimento di Fisica dell'Universita di Milano-Bicocca and Sezione di Milano dell'INFN, Milan (Italy)
  2. Dipartimento di Scienza dei Materiali dell'Universita di Milano-Bicocca and Sezione di Milano dell'INFN, Milan (Italy)
  3. Dipartimento di Fisica dell'Universita dell'Aquila, Coppito (AQ) (Italy)
  4. Dipartimento di Fisica dell'Universita dell'Insubria, Como (Italy) and Sezione di Milano dell'INFN (Italy)
  5. ITC-IRST and Gruppo Collegato di Trento dell'INFN, Povo (Tunisia) (Italy)
Publication Date:
OSTI Identifier:
20778538
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 96; Journal Issue: 4; Other Information: DOI: 10.1103/PhysRevLett.96.042503; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANTINEUTRINOS; BETA DECAY; BRANCHING RATIO; ELECTRON EMISSION; FINE STRUCTURE; GAMOW-TELLER RULES; MASS; P WAVES; RHENIUM 187; S WAVES

Citation Formats

Arnaboldi, C., Brofferio, C., Capelli, S., Capozzi, F., Cremonesi, O., Fiorini, E., Nucciotti, A., Pavan, M., Pessina, G., Pirro, S., Previtali, E., Sisti, M., Benedek, G., Filipponi, A., Giuliani, A., Pedretti, M., and Monfardini, A.. Measurement of the p to s Wave Branching Ratio of {sup 187}Re {beta} Decay from Beta Environmental Fine Structure. United States: N. p., 2006. Web. doi:10.1103/PHYSREVLETT.96.0.
Arnaboldi, C., Brofferio, C., Capelli, S., Capozzi, F., Cremonesi, O., Fiorini, E., Nucciotti, A., Pavan, M., Pessina, G., Pirro, S., Previtali, E., Sisti, M., Benedek, G., Filipponi, A., Giuliani, A., Pedretti, M., & Monfardini, A.. Measurement of the p to s Wave Branching Ratio of {sup 187}Re {beta} Decay from Beta Environmental Fine Structure. United States. doi:10.1103/PHYSREVLETT.96.0.
Arnaboldi, C., Brofferio, C., Capelli, S., Capozzi, F., Cremonesi, O., Fiorini, E., Nucciotti, A., Pavan, M., Pessina, G., Pirro, S., Previtali, E., Sisti, M., Benedek, G., Filipponi, A., Giuliani, A., Pedretti, M., and Monfardini, A.. Fri . "Measurement of the p to s Wave Branching Ratio of {sup 187}Re {beta} Decay from Beta Environmental Fine Structure". United States. doi:10.1103/PHYSREVLETT.96.0.
@article{osti_20778538,
title = {Measurement of the p to s Wave Branching Ratio of {sup 187}Re {beta} Decay from Beta Environmental Fine Structure},
author = {Arnaboldi, C. and Brofferio, C. and Capelli, S. and Capozzi, F. and Cremonesi, O. and Fiorini, E. and Nucciotti, A. and Pavan, M. and Pessina, G. and Pirro, S. and Previtali, E. and Sisti, M. and Benedek, G. and Filipponi, A. and Giuliani, A. and Pedretti, M. and Monfardini, A.},
abstractNote = {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 {sup 187}Re crystalline compound. The experiment has been carried out with an array of eight AgReO{sub 4} thermal detectors operating at a temperature of {approx}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 {sup 187}Re {beta} decay spectrum is crucial for future experiments aiming at the precise calorimetric measurement of the antineutrino mass.},
doi = {10.1103/PHYSREVLETT.96.0},
journal = {Physical Review Letters},
number = 4,
volume = 96,
place = {United States},
year = {Fri Feb 03 00:00:00 EST 2006},
month = {Fri Feb 03 00:00:00 EST 2006}
}