Beta asymmetry parameter in the decay of In-114

0338857 - ÚJF 2010 RIV US eng J - Journal Article
Wauters, F. - De Leebeeck, V. - Kraev, I. - Tandecki, M. - Traykov, E. - Van Gorp, S. - Severijns, N. - Zákoucký, Dalibor
Beta asymmetry parameter in the decay of In-114.
Physical Review. C. Roč. 80, č. 6 (2009), 062501/1-062501/5. ISSN 0556-2813
Institutional research plan: CEZ:AV0Z10480505
Keywords : beta decay * left-right asymmetry * nuclear oreintation
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders
Impact factor: 3.477, year: 2009

The beta-asymmetry parameter A approximate to for the pure Gamow-Teller decay of In-114 is reported. The low-temperature nuclear orientation method was combined with a GEANT4-based simulation code allowing us, for the first time, to address in detail the effects of scattering and the magnetic field. The result, A approximate to=-0.994 +/- 0.010(stat)+/- 0.010(syst), 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 approximate to=-1 and provides new limits on tensor-type charged weak currents.
Permanent Link: http://hdl.handle.net/11104/0182519