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An experiment for the measurement of the bound- β-decay of the free neutron |
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| Authors: | W. Schott G. Dollinger T. Faestermann J. Friedrich F. J. Hartmann R. Hertenberger N. Kaiser A. R. Müller S. Paul A. Ulrich |
| Affiliation: | 1. Physik Department, Technische Universit?t München, D-85748, Garching, Germany 2. Institut für Angewandte Physik und Messtechnik, Universit?t der Bundeswehr München, D-85577, Neubiberg, Germany 3. Sektion Physik der Ludwig-Maximilians-Universit?t München, D-85748, Garching, Germany |
| Abstract: | The hyperfine-state population of hydrogen after the bound-β-decay of the neutron directly yields the neutrino left-handedness or a possible right-handed admixture and possible small scalar and tensor contributions to the weak force. Using the through-going beam tube of a high-flux reactor, a background free hydrogen rate of ca. 3s^-1 can be obtained. The detection of the neutral hydrogen atoms and the analysis of the hyperfine states is accomplished by Lamb shift source type quenching and subsequent ionization. The constraints on the neutrino helicity and the scalar and tensor coupling constants of the weak interaction can be improved by a factor of ten. |
| Keywords: | 13.30.Ce Leptonic, semileptonic, and radiative decays 14.20.Dh Protons and neutrons |
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