München 2006 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 21: Postersitzung
HK 21.6: Poster
Dienstag, 21. März 2006, 15:30–17:00, P
An experiment for the measurement of the bound β-decay of the free neutron — •W. Schott1, G. Dollinger2, T. Faestermann1, J. Friedrich1, F.J. Hartmann1, R. Hertenberger3, N. Kaiser1, A.R. Müller1, S. Paul1, and A. Ulrich1 — 1Physik- Department, TU- München, D-85747 Garching, Germany — 2Universität der Bundeswehr München, D-85577 Neubiberg, Germany — 3Sektion Physik der LMU-München, D-85747 Garching, Germany
The H hyperfine state population after the neutron bound β decay yields directly the neutrino left- handedness or a possible right- handed admixture, and small scalar and tensor contributions to the weak force. Using the throughgoing beam tube of a high flux reactor, a background free hydrogen rate of ca. 3 s−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 ionisation. Better constraints of the neutrino helicity and the scalar and tensor coupling constants of weak interaction by a factor 10 can be achieved. We present details and schematics of a possible experiment.