Photomultiplier tubes and NaI Crystals



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 Code Number :   9B20.30  

Disclaimer:

Reprinted by permission of Dick Berg, University of Maryland, for use on this website.

The demonstrations contained and referenced herein are listed for the purposes of cataloging and describing physics demonstrations which should be conducted only under the direction of a trained instructional support professional or physicist. These demonstrations are not presented for the purpose of being conducted by persons unconnected to this Facility and/or persons not consulting with or being supervised by the recognized instructional support professional or physicist and his/her staff. The University is responsible only for those demonstrations carried out using its own equipment using established safety and scheduling policies, and bears no responsibility for those choosing to use this source material for their own purposes. All demonstrations described and contained herein are public domain, and can also be found in reference materials in libraries, bookstores, and electronic sources.

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Condition :   Good   
Principle :   Detectors  
Area of Study :  Modern Physics  
Equipment :   Photomultiplier Tubes, NaI Crystals, Mu-Metal Shields.  

Procedure :   The NaI crystals should be kept in a reseal able plastic bag to prevent water absorbing into and degrading the crystals. The Mu-Metal shields are made of a special alloy that helps prevent the penetration by magnetic fields. These are used routinely around photomultiplier tubes as magnetic shields.  
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   References

P. Venkataramaiah, H. Sanjeeviah, and B. Sanjeevaiah, "Energy Dependence of the Relative Halfwidth of Gamma-Ray Lines in NaI (TI) Crystals - A Laboratory Experiment", AJP, Vol. 46, (3), Mar. 1978, p. 292. 

 

John H. Moore, Christopher C. Davis, Michael A. Coplan,  "Photoemissive Detectors,"  Building Scientific Apparatus 2nd Edition,  pp. 260 - 271.



Mail Questions and Comments to:  Dale Stille