Experimental studies of fission mechanism
ORAL · Invited
Abstract
The multi-nucleon transfer reaction (MNT) is a powerful tool to populate a variety of nuclides with a wide range of excitation energy. At the JAEA Tokai tandem accelerator facility, we have been studying fission mechanism through fission observables such as fission-fragment mass distributions, fission probabilities, prompt-fission neutrons, and so on.
The MNT reaction is also expected one of viable reactions to produce super-heavy nuclei with more neutrons [1]. The angular momentum transferred in the MNT reaction is an important property since it influences a survival probability of a compound nucleus. In the present study, the angular momentum transferred in MNT reactions are experimentally deduced using fission. In MNT reactions, the axis of the angular-momentum transfer can be defined as perpendicular to the reaction plane. The fission-fragment angular distribution measured with respect to this axis, thus, strongly reflects the angular momentum. We performed measurements of the fission-fragment angular distribution in the 18O+237Np reaction, and deduced the angular momenta transferred to the produced compound nuclei of 236-240Np, 237-242Pu, 238-245Am, 243-245Cm.
In this workshop, details of the experiment and results will be presented as well as other experimental activities.
[1] V.I. Zagrebaev and W. Greiner, Phys. Rev. C87, 034608 (2013).
The MNT reaction is also expected one of viable reactions to produce super-heavy nuclei with more neutrons [1]. The angular momentum transferred in the MNT reaction is an important property since it influences a survival probability of a compound nucleus. In the present study, the angular momentum transferred in MNT reactions are experimentally deduced using fission. In MNT reactions, the axis of the angular-momentum transfer can be defined as perpendicular to the reaction plane. The fission-fragment angular distribution measured with respect to this axis, thus, strongly reflects the angular momentum. We performed measurements of the fission-fragment angular distribution in the 18O+237Np reaction, and deduced the angular momenta transferred to the produced compound nuclei of 236-240Np, 237-242Pu, 238-245Am, 243-245Cm.
In this workshop, details of the experiment and results will be presented as well as other experimental activities.
[1] V.I. Zagrebaev and W. Greiner, Phys. Rev. C87, 034608 (2013).
*This work was partly supported by JSPS KAKENHI Grant Number JP21K03607.
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Presenters
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Kentaro Hirose
- JAEA, ASRC
- JAEA, ASRC, Japan
- Japan Atomic Energy Agency