Assessment of SAM 940 Cross-Talk Between Lithium Iodide (LiI) and Sodium Iodide (NaI) Scintillators
Abstract
The United States Air Force School of Aerospace Medicine, Consultative Services Division investigated false neutron counts with the Berkeley Nucleonics Corp. Model 940-2GN surveillance and measurement radioisotope identification system (SAM 940-2GN). This portable instrument is a standard component of the Bioenvironmental Engineering (BE) 886H Allowance Standard. In the presence of high-activity gamma fields, it has been demonstrated that the SAM 940-2GN will report neutron counts erroneously, which is due to cross-talk within the detector, and can be thought of as a ?false positive.? This letter provides a prediction of false neutron response in high-activity gamma environments based on empirical data. Additionally, the letter gives a decision matrix so BE personnel can appropriately assess SAM 940-2GN neutron counts and avoid potential misclassification of a source as a neutron emitter.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 28, 2012
- Accession Number
- ADA574062
Entities
People
- Andrew Mcumber
Organizations
- United States Air Force School of Aerospace Medicine