Phoswich detectors for simultaneous counting of α-, β(γ)-rays and neutrons

A system for simultaneous beta and gamma spectroscopy

“…Among other things, the scintillators are chosen to have different decay times so that the shape of the output pulse from the photomultiplier tube is dependent on the relative contribution of scintillation light from the two scintillators. Generally, phoswich detectors are designed either for simultaneous detection of different radiation types [12][13][14][15] or for minimizing the recording of background radiation in a radiation field of interest [16,17]. In both applications, scintillation layers are chosen because of their relative sensitivity to a particular radiation type.…”

“…Independent measurements of the energy deposited in each scintillator then can be obtained without the need for a second photomultiplier tube. Many researchers have been involved in developing detection systems capable of differentiating between radiation types [3,4,[12][13][14][15][16][17][18][19][20][21].…”

“…Usuda et al [12,13] developed several phoswich detectors for simultaneous counting of alpha, beta (gamma), thermal and fast neutrons. The separation of pulses induced from different radiation types was carried out using the rise-time measurement technique with traditional analog systems.…”

MCNP analysis of a multilayer phoswich detector for β-particle dosimetry and spectroscopy

“…Pulse shape analysis (PSA) distinguishes the signals from the scintillators, thus identifying in which scintillator the event occurred. Phoswich detectors for simultaneous counting of a-, band g-rays have been successfully developed by coupling two or three scintillators with different decay times [2,3]. The rise time measurement is the most popular technique to discriminate among pulses from a phoswich detector.…”

“…Generally, phoswich detectors are designed either for simultaneous detection of different radiation types [2,3] or minimizing the recording of background radiation in a radiation field of interest [4,5]. In both applications, each scintillation layer is chosen to be sensitive to a particular radiation type.…”