phoswich detector

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{{cite journal | doi = 10.1063/1.1746324 | author = D. T. Wilkinson | title = The Phoswich-A Multiple Phosphor | journal = Review of Scientific Instruments | year = 1952 | volume = 23 | issue = 8 | page = 414-417| bibcode = 1952RScI...23..414W }} ("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.

Phoswich applications are frequently seen in sensitive and low-background radiation sensors used in space research.

References

[http://www.iop.org/Jet/fulltext/EFDP07016.pdf Characterization of Phoswich Scintillation Detectors for the Focal Plane Hodoscope of Magnetic Proton Recoil Spectrometers for Fusion Neutrons]
[http://www.xia.com/Papers/SRR05_Pixie-4_phoswich.pdf DIGITAL PULSE SHAPE ANALYSIS WITH PHOSWICH DETECTOR S TO SIMPLIFY COINCIDENCE MEASUREMENTS OF RADIOACTIVE XENON]
[http://www.irpa.net/irpa3/cdrom/VOL.3B/W3B_30.PDF APPLICATION OF PHOSWICH DETECTORS FOR LUNG COUNTING PLUTONIUM-238]
{{cite journal |last1=Chung |first1=Y. H. |last2=Choi |first2=Y. |last3=Cho |first3=G. |last4=Choe |first4=Y. S. |last5=Lee |first5=K. H. |last6=Kim |first6=B. T. |title=Characterization of dual layer phoswich detector performance for small animal PET using Monte Carlo simulation |journal=Physics in Medicine and Biology |date=Jul 7, 2004 |volume=49 |issue=13 |pages=2881–90 |pmid=15285253 |bibcode = 2004PMB....49.2881C |doi = 10.1088/0031-9155/49/13/008|s2cid=250875311 }}
[http://www.ldeo.columbia.edu/res/pi/Monitoring/Doc/Srr_2006/PAPERS/05-03.PDF STUDY OF A TRIPLE-LAYER PHOSWICH DETECTOR FOR BETA AND GAMMA SPECTROSCOPY WITH MINIMAL CROSSTALK]

External links

[https://web.archive.org/web/20070927192842/http://www.detectors.saint-gobain.com/Media/Documents/S0000000000000001004/SGC%20-%20Bicron%20Brand%20Phoswich%20Configurations%200302.pdf Phoswich Detectors For High Energy Backgrounds] (Saint-Gobain)
[https://web.archive.org/web/20120308201512/http://www.rmdinc.com/research/imagingtech-scintmat.html Continuous Phoswich scintillators and detectors] (Radiation Monitoring Devices, Inc.)

Category:Ionising radiation detectors