FACILITIES FOR HIGH-INTENSITY NEUTRON IRRADIATION.
MARION (JERRY B) SILVER SPRING MD
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An analysis is made of the possibilities of producing high-intensity beams of neutrons with energies other than 14 MeV. It appears that the 3-MV accelerators which are likely to be available within the next few years will be capable of delivering beams of charged particles with currents up to about 15 mA. With this beam limitation it will not be possible to deliver a sample irradiation flux of more than 10 to the 11th power neutronssec, if monoenergetic neutrons are required. On the other hand, present capabilities of higher energy accelerators e.g., 100-MeV cyclotrons will permit the generation of approximately 10 to the 15th neutronssec. Since the majority of these neutrons are emitted into a very narrow forward cone, it would be possible to utilize almost the entire neutron output for irradiation purposes. For biological studies in which the maximum possible neutron flux is required, it appears that an accelerator which will yield beam energies considerably in excess of 3 MeV will be required.
- Particle Accelerators