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Title: Measuring mass of neutrinos with {beta}-decays of tritium and rhenium

Abstract

Already long time ago the shape of the electron spectrum in {beta}-decays of {sup 3}H and {sup 187}Re has been recognized as an important tool for understanding of neutrino masses. The sensitivity of KATRIN (in preparation, tritium {beta}-decay) and the MARE (under consideration, {sup 187}Re{beta}-decay) experiments to neutrino mass will reach the sub eV domain. In view of this experimental progress there is a request for a highly accurate theoretical description of the electron endpoint spectra. By taking the advantage of the elementary particle treatment of {sup 3}H and {sup 3}He the relativistic form for {beta}-decay endpoint spectrum of tritium is obtained by taking into account also the effect of nuclear recoil. Further, the currently unknown shape of the electron spectrum for the {beta}-decay of {sup 187}Re is presented. It is found that the first forbidden {sup 187}Re(5/2{sup +}){yields}{sup 187}Os(1/2{sup -}){beta}-decay transition is accompanied with emission of mostly p{sub 3/2}-state electrons.

Authors:
 [1];  [1];  [2]
  1. Department of Nuclear Physics and Biophysics, Comenius University, Mlynska dolina, SK-84248 Bratislava (Slovakia)
  2. (Russian Federation)
Publication Date:
OSTI Identifier:
21322963
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1180; Journal Issue: 1; Conference: Workshop on circulation of double-beta-decay matrix, Prague (Czech Republic), 15-19 Jun 2009; Other Information: DOI: 10.1063/1.3266089; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; DOUBLE BETA DECAY; ELECTRON EMISSION; ELECTRON SPECTRA; ELECTRONS; EV RANGE; HELIUM 3; MULTIPARTICLE SPECTROMETERS; NEUTRINOS; PARTICLE IDENTIFICATION; RECOILS; REST MASS; RHENIUM 187; SENSITIVITY; SPIN; TRITIUM

Citation Formats

Dvornicky, R., Simkovic, F., and Bogolyubov Laboratory of Theoretical Physics, JINR, Dubna. Measuring mass of neutrinos with {beta}-decays of tritium and rhenium. United States: N. p., 2009. Web. doi:10.1063/1.3266089.
Dvornicky, R., Simkovic, F., & Bogolyubov Laboratory of Theoretical Physics, JINR, Dubna. Measuring mass of neutrinos with {beta}-decays of tritium and rhenium. United States. doi:10.1063/1.3266089.
Dvornicky, R., Simkovic, F., and Bogolyubov Laboratory of Theoretical Physics, JINR, Dubna. Mon . "Measuring mass of neutrinos with {beta}-decays of tritium and rhenium". United States. doi:10.1063/1.3266089.
@article{osti_21322963,
title = {Measuring mass of neutrinos with {beta}-decays of tritium and rhenium},
author = {Dvornicky, R. and Simkovic, F. and Bogolyubov Laboratory of Theoretical Physics, JINR, Dubna},
abstractNote = {Already long time ago the shape of the electron spectrum in {beta}-decays of {sup 3}H and {sup 187}Re has been recognized as an important tool for understanding of neutrino masses. The sensitivity of KATRIN (in preparation, tritium {beta}-decay) and the MARE (under consideration, {sup 187}Re{beta}-decay) experiments to neutrino mass will reach the sub eV domain. In view of this experimental progress there is a request for a highly accurate theoretical description of the electron endpoint spectra. By taking the advantage of the elementary particle treatment of {sup 3}H and {sup 3}He the relativistic form for {beta}-decay endpoint spectrum of tritium is obtained by taking into account also the effect of nuclear recoil. Further, the currently unknown shape of the electron spectrum for the {beta}-decay of {sup 187}Re is presented. It is found that the first forbidden {sup 187}Re(5/2{sup +}){yields}{sup 187}Os(1/2{sup -}){beta}-decay transition is accompanied with emission of mostly p{sub 3/2}-state electrons.},
doi = {10.1063/1.3266089},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1180,
place = {United States},
year = {Mon Nov 09 00:00:00 EST 2009},
month = {Mon Nov 09 00:00:00 EST 2009}
}