Münster 2017 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HK: Fachverband Physik der Hadronen und Kerne
HK 27: Poster
HK 27.41: Poster
Dienstag, 28. März 2017, 16:45–18:45, F Foyer
The neutron lifetime experiment τSPECT — •Kim Ross1, Marcus Beck1, Christopher Geppert2, Jan Haack1, Werner Heil1, Jan Kahlenberg1, Jan Karch1, Sergei Karpuk2, Yuri Sobolev2, and Norbert Trautmann2 — 1Institut für Physik, Johannes Gutenberg-Universität Mainz — 2Institut für Kernchemie, Johannes Gutenberg-Universität Mainz
The decay of the free neutron into a proton, electron, and antineutrino is the prototype semileptonic weak decay and is the simplest example of nuclear beta decay. The present “neutron lifetime puzzle” shows that some subtle and not understood effects in some of the experiments does not allow to quote a rather complete systematic confidence interval. Rather than relying on neutron reflection from a material wall, where neutron up-scattering and capture cause significant wall losses, magnetically trapped neutrons do not interact with matter during the storage interval. That is the obvious appeal to the use of magnetic and gravitational confinement, where, at least in principle, the dynamics of the neutron-trap interaction is straightforward. The τSPECT spectrometer provides a 3D magnetic storage of ultracold neutrons (UCN) up to 60 neV and is presently setup at the pulsed UCN source at TRIGA Mainz. By measuring both the decay protons and the surviving neutrons, an accurate neutron lifetime measurement with δt≈ 1 s is envisaged for phase I of this project.
This poster discusses the current status of τSPECT.