Excitation function of natCu(3He,x)65Zn nuclear reaction for 3He beam monitoring purpose Mayeen Uddin Khandaker, Kotaro Nagatsu, Honoka Obata, Katsuyuki Minegishi, Ming-Rong Zhang, Samer K. I. Ali and Naohiko Otuka EPJ Web Conf., 239 (2020) 20009 Published online: 30 September 2020 DOI: 10.1051/epjconf/202023920009