title: ESR response to gamma-rays of alanine pellets containing B(OH)3 or Gd2O3.
abstract: ESR response to gamma-irradiation (1-50 Gy) of blends containing alanine and either B(OH)(3) or Gd(2)O(3) is reported. The sensitivity of the alanine--B(OH)(3) blend is comparable to the sensitivity of pure alanine, although its lowest detectable dose, LDD, is smaller ( approximately 1.3 Gy) than that of pure alanine ( approximately 2.9 Gy). Alanine with Gd(2)O(3) is about two times more sensitive than pure alanine, and its LDD is 0.8 Gy. The better sensitivity and LDD are probably due to the high atomic number (Z=64) of gadolinium, which enhances the interaction probability with photons and, consequently, the radical yield. This study suggests that other high-Z atoms may be useful for increasing the sensitivity of the response of alanine to gamma-radiation.
authors.affiliation: Dipartimento di Fisica e Tecnologie Relative, Università di Palermo, Viale delle Scienze, Edificio 18, 90128 Palermo, Italy; Unità CNISM, Palermo and Gruppo V Sezione INFN, Catania.
authors.forename: M
authors.initials: M
authors.lastname: Brai
authors.forename: G
authors.initials: G
authors.lastname: Gennaro
authors.forename: M
authors.initials: M
authors.lastname: Marrale
authors.forename: A
authors.initials: A
authors.lastname: Bartolotta
authors.forename: M C
authors.initials: MC
authors.lastname: D'Oca
mesh_terms: D000409:Alanine / Q000528:radiation effects*; D001888:Boric Acids / Q000528:radiation effects*; D001895:Boron; D004578:Electron Spin Resonance Spectroscopy / Q000379:methods*; D005682:Gadolinium / Q000528:radiation effects; D005720:Gamma Rays; D007554:Isotopes; D011874:Radiometry / Q000379:methods*
chemical_list: D001888:Boric Acids; D007554:Isotopes; C030581:gadolinium oxide; D005682:Gadolinium; D001895:Boron; D000409:Alanine; C032688:boric acid