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Phoswich detectors were developed to detect low-intensity, low-energy gamma rays, X-rays, as well as alpha and beta particles efficiently in a higher-energy ambient background. Some detector designs can measure and separately identify all energies simultaneously.
A phoswich ('phosphor sandwich') is a combination of scintillators with dissimilar pulse shape characteristics optically coupled to each other and to a common PMT (or PMTs). Pulse shape analysis distinguishes the signals from the two scintillators, identifying in which scintillator the event occurred.
In 2010 development of a monolithic phoswich sensor technology was announced, departing from the discrete designs. This novel development, termed the Continuous Phoswich scintillator and detector, provides a number of bits of depth-of-interaction (DOI) information, a significant improvement over the 1 to 2 bits available previously with discrete phoswich scintillators.
- Characterization of Phoswich Scintillation Detectors for the Focal Plane Hodoscope of Magnetic Proton Recoil Spectrometers for Fusion Neutrons
- DIGITAL PULSE SHAPE ANALYSIS WITH PHOSWICH DETECTOR S TO SIMPLIFY COINCIDENCE MEASUREMENTS OF RADIOACTIVE XENON
- APPLICATION OF PHOSWICH DETECTORS FOR LUNG COUNTING PLUTONIUM-238
- Chung, YH; Choi, Y; Cho, G; Choe, YS; Lee, KH; Kim, BT (Jul 7, 2004). "Characterization of dual layer phoswich detector performance for small animal PET using Monte Carlo simulation.". Physics in medicine and biology 49 (13): 2881–90. Bibcode:2004PMB....49.2881C. doi:10.1088/0031-9155/49/13/008. PMID 15285253.
- STUDY OF A TRIPLE-LAYER PHOSWICH DETECTOR FOR BETA AND GAMMA SPECTROSCOPY WITH MINIMAL CROSSTALK
- Phoswich Detectors For High Energy Backgrounds (Saint-Gobain)
- Continuous Phoswich scintillators and detectors (Radiation Monitoring Devices, Inc.)
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