Synthetic polycrystals of CaSiO3 un-doped and Cd, B, Dy, Eu-doped for gamma and neutron detection

Autor(es)

Gonzales-Lorenzo, Carlos D. ^[1] ; Watanabe, Shigueo ^[1] ; Cano, Nilo F. ^{[1, 2]} ; Ayala-Arenas, Jorge S. ^[3] ; Bueno, Carmen C. ^[4]

Afiliação do(s) autor(es)

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

^[2] Univ Fed Sao Paulo, Inst Mar, Rua Doutor Carvalho de Mendonca 144, BR-11070100 Santos, SP - Brazil

^[3] UNSA, Fac Ciencias Nat & Form, Escuela Profes Fis, Av Independencia S-N, Arequipa - Peru

^[4] IPEN CNEN SP, Inst Pesquisas Energet & Nucl, Av Prof Lineu Prestes 2242, BR-05508000 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Luminescence; v. 201, p. 5-10, SEP 2018.
• Citações Web of Science: 2

Resumo

The undoped and B, Cd, Dy, Eu doped synthetic CaSiO3 polycrystals were produced in the laboratory. They are very sensitive gamma-ray detectors with main prominent TL peak occurring at about 270 degrees C, this peak was obtained using 4 degrees C/s heating rate. The TL behavior changes very little by doping with B, Cd and Dy while Eu doping brings changes. These minerals can be used also for neutron dosimetry. Thermal neutrons react with Ca, Si and O through (n, gamma) process and. emitted in this reaction added to gamma-rays of the reactor that produces thermal neutrons and are responsible for induction of thermoluminiscence. The TL response of CaSiO3 is linear for dose < 10 Gy and then has a supralinear behavior up to about 7 kGy and saturating beyond. (AU)

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