Thermoluminescence studies of polycrystalline CaSiO3 pellets for photons and particle therapy beams

Autor(es)

Gonzales-Lorenzo, Carlos D. ^{[1, 2]} ; Nascimento, Luana F. ^[3] ; Kodaira, Satoshi ^[4] ; Gomes, Monise B. ^[5] ; Watanabe, Shigueo ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Phys, Rua Matao, Travessa R 187, BR-05508090 Sao Paulo, SP - Brazil

^[2] Univ Nacl San Agustin UNSA, Fac Ciencias Nat & Formales, Escuela Profes Fis, Av Independencia S-N, Arequipa - Peru

^[3] SCK CEN Belgian Nucl Res Ctr, Boeretang 200, Mol - Belgium

^[4] Natl Inst Radiol Sci, Radiat Measurement Res Sect, Chiba - Japan

^[5] IPEN CNEN SP, Nucl & Energy Res Inst, Av Prof Lineu Prestes 2242, Cidade Univ, BR-05508000 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Radiation Physics and Chemistry; v. 177, DEC 2020.
• Citações Web of Science: 0

Resumo

In this work, pellets of CaSiO3 have been produced for investigation as gamma radiation, proton, and carbon ions detector. They were then irradiated to gamma radiation using Cs-137 and Co-60 sources. Furthermore, pellets of CaSiO3 were exposed to 160 MeV proton and 290 MeV/n carbon ion beam from an upper synchrotron. Thermoluminescence (TL) responses of these pellets presented the same prominent peak at about 170 degrees C, and two possible high-temperature peaks at 270 and 320 degrees C when irradiated to gamma, proton, and carbon ion beam. Dose-response curve, minimum detectable dose (MDD), energy dependence, and dependence on the dose rate when irradiated with gamma radiation were evaluated in this material. Linear dose-response curves for proton and carbon ion irradiation have been compared to that of the gamma dose-response. In this way, the dose read out in Harshaw TL reader presented a good agreement with doses found using ion chamber in the case of proton beams and slightly less in the case of carbon beam due to the LET dependency. Furthermore, relative efficiencies of CaSiO3 for beam irradiation of proton and carbon ion display no dependence in the analyzed particle doses range. (AU)

• Processo FAPESP: 14/03085-0 - Geocronologia do quaternário da costa Sudeste e Sul do Brasil
• Beneficiário: Shigueo Watanabe
• Modalidade de apoio: Auxílio à Pesquisa - Temático