Response function of thallium-activated sodium-iodide scintillation counters
- 1 June 1956
- journal article
- research article
- Published by National Institute of Standards and Technology (NIST) in Journal of Research of the National Bureau of Standards
- Vol. 56 (6) , 355-366
- https://doi.org/10.6028/jres.056.046
Abstract
Measurements of gamma rays with Nal (Tl) crystals yield pulse height distributions related to the true energy spectrum by an integral equation whose kernel (response function) is the probability that an incident photon of energy E will give rise to a pulse of size E. The response function was calculated by the Monte Carlo method for photons with energies from 0.279 to 4.45 Mev. Results are presented for cylindrical crystals ranging in size from 0.25 (radius) by 0.5 inch (length) to 2.5 by 9 inches. They are based on the analysis of 50,000 photon histories sampled with the use of the Standards Electronic Automatic Computer (SEAC). Analytical corrections were made for the escape of annihilation radiation and brems-strahlung from the crystal.This publication has 0 references indexed in Scilit: