title: The gamma ray response of alanine film dosimeters at low temperatures.
abstract: The response of alanine film EPR dosimeters was studied for low temperature gamma irradiation conditions (77-293 K) in the dose interval from 6.3 to 80 kGy. It was found that the response of the dosimeter decreases with decreased irradiation temperature and saturates at lower doses for lower irradiation temperatures. The analysis of the EPR signal suggests that the radical species formed at low temperature are the same as those used for dosimetry at room temperature, but with different concentrations. Their concentrations evolve as the temperature of the sample increases until the usual EPR signal used at room temperature is obtained.
authors.affiliation: Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, México DF 04510, México.
authors.forename: Alicia
authors.initials: A
authors.lastname: Negron-Mendoza
authors.forename: R M
authors.initials: RM
authors.lastname: Uribe
authors.forename: Sergio
authors.initials: S
authors.lastname: Ramos-Bernal
authors.forename: Claudia
authors.initials: C
authors.lastname: Camargo-Raya
authors.forename: Virginia
authors.initials: V
authors.lastname: Gomez-Vidales
mesh_terms: D000409:Alanine / Q000528:radiation effects*; D003080:Cold Temperature; D004578:Electron Spin Resonance Spectroscopy; D005373:Film Dosimetry; D005720:Gamma Rays
chemical_list: D000409:Alanine