A study of neutron spectra from medical linear accelerators.
Appl Radiat Isot
; 62(1): 69-72, 2005 Jan.
Article
in En
| MEDLINE
| ID: mdl-15498687
ABSTRACT
Medical accelerators with photon energies over 10 MeV generate an undesired fast neutron contamination in the therapeutic beam. In this work, the Monte Carlo code MCNP was used to simulate the transport of these photoneutrons across the head of various medical accelerators of high energy. The average and most probable neutron energies were obtained from these spectra, before and after crossing the accelerator shielding. The degradation of these spectra, when they cross concrete barriers with thickness which vary between 25 and 100 cm, was also studied.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Radiometry
/
Models, Statistical
/
Radiosurgery
/
Artifacts
/
Risk Assessment
/
Equipment Failure Analysis
/
Fast Neutrons
Type of study:
Diagnostic_studies
/
Etiology_studies
/
Evaluation_studies
/
Health_economic_evaluation
/
Prognostic_studies
/
Risk_factors_studies
Language:
En
Journal:
Appl Radiat Isot
Journal subject:
MEDICINA NUCLEAR
/
SAUDE AMBIENTAL
Year:
2005
Document type:
Article
Affiliation country:
Brasil