Measurement displacement cross-section of copper for 3-GeV protons

Meigo, Shinichiro   ; Matsuda, Hiroki  ; Iwamoto, Yosuke   ; Iwamoto, Hiroki   ; Hasegawa, Shoichi   ; Maekawa, Fujio  ; Yoshida, Makoto*; Ishida, Taku*; Makimura, Shunsuke*; Nakamoto, Tatsushi*

At the 3 GeV proton synchrotron accelerator facility in J-PARC Center, a displacement cross-section of copper with 3 GeV protons was measured. As a result, it was the first time in the world that we could obtain the displacement cross-section of 3 GeV protons. Calculations by the NRT model commonly used for Displacement per Atom (DPA) evaluations, the NRT model was found to overestimate the experiment approximately 3 times. A new model, which is recently developed by Nordlund et al, was shown to reproduce the experiment well.