Development of nuclear transmutation methods for converting LLFP into stable or short-lived nuclides, 9; Measurement of double differential (d,xn) cross sections for lithium at an incident energy of 200 MeV

Sadamatsu, Hiroki*; Watanabe, Yukinobu*; Nakano, Keita*; Kawase, Shoichiro* ; Kin, Tadahiro*; Araki, Shohei*; Iwamoto, Yosuke   ; Satoh, Daiki   ; Hagiwara, Masayuki*; Yashima, Hiroshi*; Shima, Tatsushi*

Recently, the deuteron incident reaction on light nuclear targets is expected to be used as accelerator-based neutron sources for nuclear transmutation of Long-Lived Fission Products (LLFP). However, there is no experimental data to validate theoretical models at an incident energy over 102 MeV. In this work, double-differential neutron production cross sections for deuteron-induced reactions on lithium at an incident energy of 200 MeV were measured at the Research Center of Nuclear Physics (RCNP), Osaka University. Measurements were carried out at six positions every five degrees between 0 and 25 to the beam direction, and neutron energies were determined by a time of flight method. To obtain data with wide neutron energy range, two EJ301 liquid organic scintillators of different size were set. As a result, we found that experimental neutron energy spectra have a broad energy peak structure with the strong forward emission due to the deuteron break-up reaction.