New neutron sources for radiotherapy
| Autor: | Bc. Page, Dk. Bewley, Jean-Pierre Meulders |
|---|---|
| Rok vydání: | 1984 |
| Předmět: |
Fission
Astrophysics::High Energy Astrophysical Phenomena Nuclear engineering Nuclear Theory chemistry.chemical_element Tantalum law.invention Fast Neutrons Radiotherapy High-Energy Kerma Radiation Protection law Humans Geiger counter Radiology Nuclear Medicine and imaging Neutron Nuclear Experiment Neutrons Physics Radiological and Ultrasound Technology business.industry Carbon Neutron temperature chemistry Neutron source Beryllium Particle Accelerators Protons Radiation protection Nuclear medicine business Copper |
| Zdroj: | Physics in Medicine and Biology. 29:341-349 |
| ISSN: | 1361-6560 0031-9155 |
| DOI: | 10.1088/0031-9155/29/4/004 |
| Popis: | All existing neutron sources suffer from disadvantages which would not be tolerated in modern megavoltage X-ray equipment. Experimental work with 30-60 MeV protons on beryllium and other elements has shown how these difficulties can to a large extent be overcome. Angular distributions and kerma rates as a function of proton energy are presented for various targets. Thin targets are found to be a better method than filtration for improving the penetration of the beam. A 237Np fission counter and a GM counter have been used to decompose stray radiation into its neutron and gamma-ray components. A model of a treatment head was found to attenuate the neutron component to less than 1% of its value in the useful beam. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|