title: Selection of an appropriate air kerma rate constant for 75Se sources.
abstract: Monte Carlo simulation techniques using a Monte Carlo N-Particle code (MCNP5) analyzed six Source Production & Equipment Co., Inc., Se industrial radiography sources to determine an appropriate air kerma rate constant for Se, factoring in source encapsulation and compared to a theoretical approximation. Based on this study, an air kerma rate constant was calculated to be 17.7 Gy cm h Ci (0.203 R m h Ci), which was found to be five times lower than values published in the 1992 Edition of the Radiological Health Handbook and Oak Ridge National Laboratory RISC-45. Simulations were also employed to determine the effects of self-attenuation with the SPEC sources, the relationship between photon transmission values, and the thickness of various shielding materials in reducing exposure rates from a (75)Se source.
authors.affiliation: University of Massachusetts Lowell, Pananski Hall, One University Avenue, Lowell, MA 01854, USA. blake.currier@gmail.com
authors.forename: Blake
authors.initials: B
authors.lastname: H Currier
authors.forename: John J
authors.initials: JJ
authors.lastname: Munro
authors.forename: David C
authors.initials: DC
authors.lastname: Medich
mesh_terms: D000388:Air; D006801:Humans; D007854:Lead; D008962:Models, Theoretical; D009010:Monte Carlo Method; D017785:Photons; D011834:Radiation Monitoring; D011879:Radiotherapy Dosage; D012644:Selenium Radioisotopes; D014414:Tungsten; D014501:Uranium
chemical_list: D012644:Selenium Radioisotopes; D007854:Lead; D014501:Uranium; D014414:Tungsten