1. The Source of Medical Isotopes and Neutrons Based on Laser-Accelerated Ions.
- Author
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Brantov, A. V., Bochkarev, S. G., Vais, O. E., Lobok, M. G., and Bychenkov, V. Yu.
- Subjects
FEMTOSECOND pulses ,LASER pulses ,NEUTRONS ,PICOSECOND pulses ,NUCLEAR reactions ,ISOTOPES ,IONS ,LASERS - Abstract
Two methods of laser acceleration of protons/deuterons for initiation of nuclear reactions in the so-called pitcher-catcher scheme aimed at production of medical isotopes and obtaining short neutron pulses are studied using the combined particle-in-cell (PIC) and Monte Carlo (GEANT4) numerical simulation. It is demonstrated that the pulse repetition frequency on the order of 100 Hz is required for obtaining a medical dose of the radionuclids used in the positron-emission tomography (PET) in the case of ion acceleration from a thin foil most efficient in the forward direction by means of a femtosecond laser pulse with energy of several joules. In the case of ion acceleration from a low-density target most efficient in the transverse (radial) direction, lasers pulses of substantially higher energy and picosecond pulse duration have to be used, which allows one to increase the yield of radionuclids per unit deposited energy. In the process, the pulse repetition frequency must be at the level of 1–10 Hz. Laser generation of neutrons by means of reactions initiated by accelerated ions obtained using thin foils or targets of lower density is simulated, and the possibility of obtaining 10
8 neutrons per laser pulse using 3-J laser pulses is demonstrated. [ABSTRACT FROM AUTHOR]- Published
- 2022
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