Beta asymmetry parameter in the decay of 114In
Nuclear Experiment
2009-12-31 v2
Abstract
The beta asymmetry parameter A for the pure Gamow-Teller decay of 114In is reported. The low temperature nuclear orientation method was combined with a GEANT4 based simulation code allowing for the first time to address in detail the effects of scattering and of the magnetic field. The result, A = -0.994 +/- 0.010stat +/- 0.010syst, constitutes the most accurate value for the asymmetry parameter of a nuclear beta transition to date. The value is in agreement with the Standard Model prediction of A = -1 and provides new limits on tensor type charged weak currents.
Keywords
Cite
@article{arxiv.0901.0081,
title = {Beta asymmetry parameter in the decay of 114In},
author = {F. Wauters and V. De Leebeeck and I. Kraev and M. Tandecki and E. Traykov and S. Van Gorp and N. Severijns and D. Zakoucky},
journal= {arXiv preprint arXiv:0901.0081},
year = {2009}
}
Comments
11 pages, 2 figures; additional information was added on systematic effects, the magnetic field map and the calculation of the Qcos(theta) values