Eur. Phys. J. A (2011) 47: 40
https://doi.org/10.1140/epja/i2011-11040-5

Regular Article - Experimental Physics

Precision half-life and Q -value measurement of the super-allowed emitter ³⁰S

¹ Centre d’Études Nucléaires de Bordeaux Gradignan, Université Bordeaux 1 - UMR 5797 CNRS/IN2P3, Chemin du Solarium, BP 120, 33175, Gradignan Cedex, France
² CSIC, Instituto Estructura de la Materia, Serrano 113bis, E-28006, Madrid, Spain
³ Department of Physics, University of Jyväskylä, P.O. Box 35, FI-40014, Jyväskylä, Finland
⁴ Physics Division, P-23, Mail Stop H803, Los Alamos National Laboratory, 87545, Los Alamos, NM, USA
⁵ Grand Accélérateur National d’Ions Lourds, CEA-DSM/CNRS-IN2P3, Boulevard Henri Becquerel, B.P. 55027, F-14076, Caen Cedex 5, France

^* e-mail: blank@cenbg.in2p3.fr

Received: 2 December 2010
Accepted: 14 February 2011
Published online: 18 March 2011

Abstract

The -decay half-life and the ground-state-to-ground-state Q _EC -value of ³⁰S were measured with a relative precision of 14 and 2 parts in 10⁴, respectively. The half-life measurement yields a value of 1175.9(17)ms which is in agreement with previous measurements but has a precision that is better by a factor of three. The new super-allowed Q _EC -value 5464.32(20)keV is 20 times more precise and slightly larger than the previously adopted value. The experiment was performed at the IGISOL facility at the Accelerator Laboratory of the University of Jyväskylä.