Modelling the absorbed dose rate of the beta standard BSS2 Pm-147 source

Autor(es)

Polo, Ivon Oramas ^[1] ; Santos, William Souza ^{[2, 1]} ; Caldas, Linda V. E. ^[1]

Afiliação do(s) autor(es)

^[1] CNEN, IPEN, Ave Prof Lineu Prestes 2242, BR-05508000 Sao Paulo, SP - Brazil

^[2] Univ Fed Uberlandia, Inst Fis, Ave Joao Naves de Avila 2121, BR-38400902 Uberlandia, MG - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Applied Radiation and Isotopes; v. 140, p. 83-86, OCT 2018.
• Citações Web of Science: 0

Resumo

The dosimetric measurements of Pm-147 beta radiation beams have limitations due to their low energy, low dose rate, great dispersion and attenuation in air or tissue. In this work, the Monte Carlo model was developed for a Pm-147 absorbed dose rate determination. This model consists of an extrapolation chamber and a Pm-147 beta radiation source. Moreover, the absorbed dose rate was determined by experimental measurements and the MCNP Monte Carlo code was used. The relative number of particles that crossed the radioactive source window and the particles that crossed the extrapolation chamber entrance window were determined. The source fluence spectrum was also determined. The results of the simulation and the experimental calculations are in agreement with the absorbed dose rate from the PTB calibration certificate. The results obtained are considered acceptable, and they agree within the uncertainties. The difference between the experimental result and that from the Monte Carlo model, compared to that from the calibration certificate, was only 0.8% in both cases. (AU)

• Processo FAPESP: 08/57863-2 - P&D em metrologia das radiações
• Beneficiário: Linda Viola Ehlin Caldas
• Modalidade de apoio: Auxílio à Pesquisa - Temático