| Full text | |
| Author(s): |
Santos, William de Souza
[1]
Total Authors: 1
|
| Affiliation: | [1] CNEN, IPEN, Ave Prof Lineu Prestes, 2242 Cidade Univ, BR-05508000 Sao Paulo, SP - Brazil
Total Affiliations: 1
|
| Document type: | Journal article |
| Source: | Applied Radiation and Isotopes; v. 140, p. 50-54, OCT 2018. |
| Web of Science Citations: | 2 |
| Abstract | |
The absorbed dose rate is the main characterization quantity for beta radiation. The extrapolation chamber is considered the primary standard instrument. To determine absorbed dose rates in beta radiation beams, it is necessary to establish several correction factors. In this work, the correction factors for the backscatter due to the collecting electrode and to the guard ring, and the correction factor for Bremsstrahlung in beta secondary standard radiation beams are presented. For this purpose, the Monte Carlo method was applied. The results obtained are considered acceptable, and they agree within the uncertainties. The differences between the backscatter factors determined by the Monte Carlo method and those of the ISO standard were 0.6%, 0.9% and 2.04% for Sr-90/Y-90,Kr- 85 and Pm-147 sources respectively. The differences between the Bremsstrahlung factors determined by the Monte Carlo method and those of the ISO were 0.25%, 0.6% and 1% for Sr-90/Y-90, Kr-85 and Pm-147 sources respectively. (AU) | |