ISSN:
1434-601X
Keywords:
PACS. 13.10.+q Weak and electromagnetic interactions of leptons – 23.20.En Angular distribution and correlation measurements – 23.40.Bw Weak-interaction and lepton (including neutrino) aspects – 25.75.Gz Particle correlations
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract: The positrons and coincident gamma-rays following the pure Fermi 0+ → 0+ branch of β+-decay in 14O were measured. The Doppler shift of the γ-quantum observed is sensitive to the beta-neutrino correlation coefficient, which is unity (α = 1) in the absence of scalar coupling. The interatomic interaction of recoiling daughters was noticed, which has prevented to obtain an improved result for scalar coupling despite of the excellent statistical accuracy of the measurement. At the same time, it was shown that the method described can be used as a very sensitive and flexible tool to probe the interatomic interactions in matter at the hundred eV energy level. Perspectives in this direction as well as the future angular-correlation experiments aimed to search for scalar coupling in beta-decay are discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1140/epja/i2002-10067-y
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