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TY - CONF AU - Nakao, N. AU - Tanaka, K. AU - Uwamino, Y. ED - Petit-Jean-Genaz, Christine ED - Arduini, Gianluigi ED - Michel, Peter ED - Schaa, Volker RW TI - Measurement of Neutrons Generated by 345MeV/u U-238 Beam at RIKEN RIBF J2 - Proc. of IPAC2014, Dresden, Germany, June 15-20, 2014 C1 - Dresden, Germany T2 - International Particle Accelerator Conference T3 - 5 LA - english AB - Neutrons generated by a 345 MeV/u uranium beam bombardment on a 3-mm-thick Be target were measured outside the target chamber using activation detectors of bismuth, aluminum and carbon at 60, 70 and 90 degrees from the beam axis. After a few days irradiation, the activation detectors were removed, and the energy spectra of photons from radionuclides generated by reactions of 209Bi(n, xn)210-xBi(x=4~10), 12C(n, 2n)11C and 27Al(n, alpha)24Na were measured using a germanium detector. Photo peak counts of corresponding photon energies were analyzed with considering detector efficiencies and a beam intensity fluctuation during the irradiation. The production rates of the radionuclides were obtained for all reactions. Monte Carlo simulation using the PHITS code was also performed. Fluxes of neutrons at the activation detectors were tallied and the energy spectra were obtained. Production rates of the radionuclides were obtained by folding the thus obtained energy spectra with activation cross section data. Comparisons with the measurements showed agreements within about 60%. PB - JACoW CP - Geneva, Switzerland SP - 1811 EP - 1813 KW - detector KW - neutron KW - target KW - simulation KW - photon DA - 2014/07 PY - 2014 SN - 978-3-95450-132-8 DO - 10.18429/JACoW-IPAC2014-TUPRI101 UR - http://jacow.org/ipac2014/papers/tupri101.pdf ER -