Project of Neutron Beta-Decay A-Asymmetry Measurement With Relative Accuracy of (1–2)×10?3 |
| |
Authors: | A Serebrov Yu Rudnev A Murashkin O Zherebtsov A Kharitonov V Korolev T Morozov A Fomin V Pusenkov A Schebetov V Varlamov |
| |
Affiliation: | PNPI, St. Petersburg Nuclear Physics Institute, 188300, Gatchina, Russia |
| |
Abstract: | We are going to use a polarized cold neutron beam and an axial magnetic field in the shape of a bottle formed by a superconducting magnetic system. Such a configuration of magnetic fields allows us to extract the decay electrons inside a well-defined solid angle with high accuracy. An electrostatic cylinder with a potential of 25 kV defines the detected region of neutron decays. The protons, which come from this region will be accelerated and registered by a proton detector. The use of coincidences between electron and proton signals will allow us to considerably suppress the background. The final accuracy of the A-asymmetry will be determined by the uncertainty of the neutron beam polarization measurement which is at the level of (1–2) × 10−3, as shown in previous studies. |
| |
Keywords: | beta-decay cold neutrons polarization |
|