TheQvalue for thesuperallowed beta decay
- 1 May 1994
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review C
- Vol. 49 (5) , 2401-2406
- https://doi.org/10.1103/physrevc.49.2401
Abstract
The threshold energy of the (p,n reaction has been measured to be 5209.46±0.12 keV, using a 1 V standard as reference, and taking account of effects due to finite beam energy spread, nonuniform proton energy loss in the target, and ionization of the magnesium atoms. The Q value derived for the beta decay then becomes 4232.17±0.12 keV, which is in clear disagreement with the most precise of the existing measurements. A further measurement is proposed.
Keywords
This publication has 9 references indexed in Scilit:
- The precise determination of QEC-value differences between four pairs of superallowed β-emitters: 14O and 26mAl, 26mAl and 42Sc, 42Sc and 54Co, 50Mn and 54CoPublished by Elsevier ,2002
- A method for determining the branching ratio for the superallowed decay:Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1991
- Some aberration and other properties of an Enge split-pole spectrographNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1991
- Superallowed 26Alm(β+ + EC)26Mg decayNuclear Physics A, 1991
- Superallowed 0+ → 0+ nuclear β-decays: A critical survey with tests of CVC and the standard modelNuclear Physics A, 1990
- Measurement of Nuclear ReactionQ-values with High Accuracy:7Li(p, n)7BeMetrologia, 1985
- An absolute determination of the 14O (β+) Fermi decay Q-valuePhysics Letters B, 1981
- The 1977 atomic mass evaluation: in four partsAtomic Data and Nuclear Data Tables, 1977
- Precision determination of Q-values relevant to superallowed nuclear β-decayNuclear Physics A, 1977