PRECISE DETERMINATION OF THE MASS DIFFERENCE GE-76 SE-76 AND A DERIVED UPPER LIMIT ON THE MAJORANA MASS OF THE ELECTRON NEUTRINO

Authors
HYKAWY JG NXUMALO JN UNGER PP LANDER CA PETERS RD BARBER RC SHARMA KS DUCKWORTH HE
Citation
Jg. Hykawy et al., PRECISE DETERMINATION OF THE MASS DIFFERENCE GE-76 SE-76 AND A DERIVED UPPER LIMIT ON THE MAJORANA MASS OF THE ELECTRON NEUTRINO, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 329(3), 1993, pp. 423-432
Citations number
40
Categorie Soggetti
Nuclear Sciences & Tecnology","Physics, Particles & Fields","Instument & Instrumentation",Spectroscopy
Journal title
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment → ACNP
ISSN journal
01689002
Volume
329
Issue
3
Year of publication
1993
Pages
423 - 432
Database
ISI
SICI code
0168-9002(1993)329:3<423:PDOTMD>2.0.ZU;2-9
Abstract
Recent improvements to both the instrumentation and data analysis tech niques associated with the Manitoba II high resolution mass spectromet er have led to greater precision and accuracy. The mass difference bet ween Ge-76 and Se-76 has been redetermined to be 2038.58 (31) keV. Whe n the new Ge-76 double-beta decay Q-value is used to examine recent sp ectra reported by groups searching for the characteristic sharp peak e xpected for neutrinoless double-beta decay, no evidence for the occurr ence of such a decay is found. New upper limits can be derived for the electron neutrino mass. Reanalysis of earlier data is also presented, leading to a value for the mass difference Se-74 - Ge-74 of 1209.53 ( 48) keV.