[3H01-03] Small Neutron Source

[3H02] Isotope Generation at a Laser-driven Neutron Source and Neutron Fluence Estimated by Activation Method

*Takato Mori¹, Akifumi Yogo¹, Takehito Hayakawa^2,1, Yasunobu Arikawa¹, Yuki Abe^1,3, S.R. Mirfayzi⁴, Hiroaki Nishimura⁵, Mitsuo Nakai^5,1, Shinsuke Fujioka¹, Ryosuke Kodama¹ (1. Institute of Laser Engineering, Osaka Univ., 2. QST, 3. Osaka Univ., 4. Blackett Laboratory, Imperial College London, 5. FUT)

Keywords:Laser-driven neutron sources, Activation method, (n, 2n) reactions

The development of high intensity lasers propelled science based upon high-energy ions generated by laser-generated plasma and laser-accelerated ions are expected to be applied in a wide range of fields. One of the applications of laser-accelerated ion is neutron generation using nuclear reactions (termed by a Laser-driven Neutron Sources, LDNSs), and it is expected to be applied to nuclear astrophysics. The neutrons generated by a laser-driven neutron source have an energy distribution up to a few tens MeV. In the experiment, the results showing that the (n, 2n) reaction was induced. We developed a measurement method using (n, 2n) reactions with neutron time-of-flight and measured laser-driven fast neutrons using it.