Münster 2011 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 10: Struktur und Dynamik von Kernen III
HK 10.2: Vortrag
Montag, 21. März 2011, 17:00–17:15, A-1
Neutron Bound β- Decay- BOB — •M. Gabriel1, M. Berger1, R. Emmerich1, R. Engels2, T. Faestermann1, P. Fierlinger3, E. Gutsmiedl1, F.J. Hartmann1, R. Hertenberger4, S. Paul1, R. Röhrmoser5, S. Ruschel1, J. Schön1, W. Schott1, U. Schubert1, A. Trautner1, and T. Udem6 — 1Physik-Department, TUM, 85748 Garching — 2Institut für Kernphysik, Forschungszentrum Jülich, 52425 Jülich — 3Excellence Cluster Universe, TUM, 85748 Garching — 4Sektion Physik, LMU,85748 Garching, Germany — 5FRM2, TUM, 85748 Garching,Germany — 6Max- Planck- Institut für Quantenphysik, 85748 Garching, Germany
The bound neutron β-decay(BOB) into a hydrogen atom and an electron antineutrino is investigated.The hyper-fine-state population of the monoenergetic hydrogen atoms (326.3 eV) yields the neutrino left-handed-ness or a possible right-handed admixture and possible small scalar and tensor contributions to the weak force. Preexperiments to measure the BOB H(2s) atoms have been done or are being set up using ionizer and RF discharge proton sources, a Wien filter, Cs and Ar cells, a spin filter, electric counter and accelerating fields, a double focusing magnet and a solar blind PM for the Lyman-α photons. In a first experiment, the charge exchange of the H(2s) atoms into H−, offering a selective method to discrimiate these states against background, is investigated. In a second step the number of background H(2s) resulting from protons interacting with the walls of the experimental setup are determined. For this a quenching E field and a solar blind PM are used.