Surrogate reactions for neutron-induced fission reaction and neutron capture reaction by heavy ion transfer reaction*

A project of the fission data measurement (cross sections, fragment mass distribution,  total kinetic energy, and neutron multiplicities) as well as the measurement of the neutron capture cross sections, using a surrogate method based on multi-nucleon transfer reactions induced by heavy-ion projectile, is running at Japan Atomic Energy Agency (JAEA).  We have constructed appatus consists of a fission setup including four position-sensitive multi-wire proportional counters (MWPCs) to detect fission fragments and a capture setup containing two anti-Compton LaBr₃(Ce) spectrometers to measure the γ-rays from the populated compound nuclei. Both setups contain a Si ΔE-E detector system to detect outgoing projectile-like particles by which we can indentify the populated compound nuclei. We also placed 33 scintillators around the fission setup to detect fission neutrons in coincidence with the fission fragments. The measurements was carried out at the JAEA-Tokai tandem accelerator facility. Reactions of ¹⁸O projectile on actinide targets such as ²³²Th, ²³⁸U, and ²⁴⁸Cm were used to measure the fission data. For the measurement of the nuetron capture cross sections, we used multi-nucleon transfer channels of ^{155, 157}Gd + ¹⁸O and ^{90, 92}Zr + ¹⁸O reactions. In this contribution, we will present our results on neutron-induced fission and neutron capture cross sections by using the surrogate method.