Evaluation of (, n) reaction for the laser-driven acceleration

Sakaki, Hironao; Fukuda, Yuji; Kanasaki, Masato; Nishiuchi, Mamiko; Jinno, Satoshi   ; Yogo, Akifumi; Fukami, Tomoyo; Watanabe, Yukinobu; Sato, Tatsuhiko   ; Niita, Koji*

In current researches of laser-driven acceleration, electron energies are getting higher as the high-energy ions are generated. Therefore, when the energy of ion exceeds several-tens of MeV, it is impossible to disregard the neutron generation from the (, n) reactions. Although such a neutron becomes as a background-nose of the ion measurement, a quantitative evaluation has not carried out in the laser-driven ions acceleration experiments. We report an evaluation of those neutron properties by using measurement data in the laser-plasma interaction experiments, and it is discussed with a result of Monte Carlo simulation including the (, n) reaction processes.