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A new fast-neutron source for radiobiological research
G Wolber1, K H Hoever, O Krauss
1Department of Radiology, German Cancer Research Centre, Heidelberg, Germany.
Physics in Medicine and Biology
|April 1, 1997
Summary
A new fast-neutron source enhances a biomedical cyclotron facility for radiobiology and biophysics research. This facility provides variable energy neutron beams for advanced studies.
Area of Science:
- Nuclear Physics
- Radiobiology
- Biophysics
Background:
- Biomedical cyclotrons are crucial for radionuclide production.
- Radiobiological and biophysical studies require precise neutron sources.
- Existing facilities may lack the flexibility for diverse neutron energy and LET studies.
Purpose of the Study:
- To describe the design and capabilities of a new experimental fast-neutron source.
- To enable radiobiological and biophysical research using variable fast-neutron beams.
- To present initial dosimetric data for the new neutron facility.
Main Methods:
- Utilized a K = 32 negative-ion cyclotron to bombard beryllium targets.
- Employed protons (18-32 MeV) and deuterons (8.7-15 MeV) for neutron production.
- Characterized neutron beams for average energy and Linear Energy Transfer (LET) distributions.
Main Results:
- Successfully established a fast-neutron source integrated with a biomedical cyclotron.
- Achieved variable average neutron energies from approximately 4 to 15 MeV.
- Measured dose rates up to 1.85 cGy/microA/min at 1 m SSD, with high flux capabilities.
Conclusions:
- The extended cyclotron facility offers versatile fast-neutron beams for radiobiological and biophysical research.
- The new source provides essential capabilities for studies requiring specific neutron energies and LET.
- The facility is well-characterized, with presented dosimetric results supporting its utility.