Project of Neutron Beta-Decay A-Asymmetry Measurement With Relative Accuracy of (1-2)×10(-3).
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.
PNPI, St. Petersburg Nuclear Physics Institute, 188300, Gatchina, Russia.
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Serebrov
PNPI, St. Petersburg Nuclear Physics Institute, 188300, Gatchina, Russia.
Yu
Y
Rudnev
PNPI, St. Petersburg Nuclear Physics Institute, 188300, Gatchina, Russia.
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Murashkin
PNPI, St. Petersburg Nuclear Physics Institute, 188300, Gatchina, Russia.
O
O
Zherebtsov
PNPI, St. Petersburg Nuclear Physics Institute, 188300, Gatchina, Russia.
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A
Kharitonov
PNPI, St. Petersburg Nuclear Physics Institute, 188300, Gatchina, Russia.
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V
Korolev
PNPI, St. Petersburg Nuclear Physics Institute, 188300, Gatchina, Russia.
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T
Morozov
PNPI, St. Petersburg Nuclear Physics Institute, 188300, Gatchina, Russia.
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A
Fomin
PNPI, St. Petersburg Nuclear Physics Institute, 188300, Gatchina, Russia.
V
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Pusenkov
PNPI, St. Petersburg Nuclear Physics Institute, 188300, Gatchina, Russia.
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Schebetov
PNPI, St. Petersburg Nuclear Physics Institute, 188300, Gatchina, Russia.
V
V
Varlamov
beta-decay; cold neutrons; polarization