81009502

open access

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A Study of a High-Energy Gamma-ray Spectrum Produced by 9Be(α,nγ)12C Reaction to Diagnose the Escaping Helium from a Fusion Plasma

Journal of maritime researches

6

63-71

神戸大学大学院海事科学研究科附属国際海事研究センター

2016-06

2016-07-04

Nuclear fusion reactor has been developed and studied all over the world in order to generate electricity. To demonstrate nuclear reactions in fusion reactors, an in-beam study has been conducted with a tandem accelerator at Kobe University. The gamma rays generated by the reaction were measured with a high purity germanium detector. The angular dependence of the gamma-ray yield was measured, and the cross section of the reaction was discussed. The energy spectra of the gamma-rays were also measured. Since the excited nucleus in the reaction emits gamma-rays before the nucleus stops, the spectra of gamma-rays are affected by the Doppler effect. The Doppler shift and broadening were observed as functions of the detection angle. A computer simulation of these effects was conducted. The comparison of these effects were in agreement with the experimental results. Results suggest that there is a diagnostic capability for the escaping helium particles from the burning plasmas.

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