| 摘要 |
A cyclotron and a target system containing rotating foils (12), composed of target nuclide to undergo nuclear reactions with the beam from the cyclotron are integrated into one unit such that the foils (12), intercept the orbit of the accelerating beam in the cyclotron. Accordingly, the beam strikes the foils (12), to undergo nuclear reaction therein and to correspondingly lose a small portion of its energy in its passage through the foils (12). The transmitted beam from the foils (12), gains the lost energy to the foils (12), as it circulates in the accelerating zone of the cyclotron and subsequently re-strikes the foils (12), thereby accumulating beam current and increasing the rate of nuclear reactions. The integrated unit is termed the Recyclotron, is ideal for producing neutrons for Boron Neutron Capture Therapy by accelerating a beam of protons and using beryllium foils, and may also be used to enhance generation of a radionuclide from a thin foil (12), target that has a high melting point.
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