Author:
Abdurashitov D.,Baranov A.,Borisenko D.,Guber F.,Ivashkin A.,Morozov S.,Musin S.,Strizhak A.,Tkachev I.,Volkov V.,Zhuikov B.
Abstract
Abstract
An experimental setup for studying the Compton scattering of
annihilation photons in various (entangled and decoherent) quantum
states is presented. Two entangled γ-quanta with an energy
of 511 keV and mutually orthogonal polarizations are produced by
positron-electron annihilation in a thin aluminum plate and are
emitted in opposite directions. To measure both photons, the setup
provides two equivalent arms of Compton polarimeters. A Compton
polarimeter consists of a plastic scintillation scatterer and an
array of NaI(Tl) detectors for measuring photons deflected at an
angle of 90°. The intermediate scatterer of the GAGG
scintillator with SiPM readout is inserted into one of the arms to
create a tagged decoherence process prior to the measurement of
annihilation photons in polarimeters. The performance of Compton
scatterers and NaI(Tl) counters is discussed. The polarization
modulation factor and the analyzing power of Compton polarimeters
are evaluated from the angular distributions of scattered
gammas. The Compton scattering of photons in entangled and
decoherent states is compared reliably for the first time.
Subject
Mathematical Physics,Instrumentation
Cited by
10 articles.
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