Production of neutron-rich nuclei approaching r-process by gamma-induced fission of 238U at ELI-NP
Extreme Light Infrastructure Nuclear Physics, “Horia Hulubei” National Institute for Physics and Nuclear Engineering, Str.Reactorului 30, Bucharest Magurele, 077125 Romania
2 Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
3 Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam
4 Centre of Nuclear Physics, Institute of Physics, Vietnam Academy of Science and Technology, Hanoi, Vietnam
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Published online: 16 May 2018
The investigation of neutron-rich exotic nuclei is crucial not only for nuclear physics but also for nuclear astrophysics. Experimentally, only few neutron-rich nuclei near the stability have been studied, however, most neutron-rich nuclei have not been measured due to their small production cross sections as well as short half-lives. At ELI-NP, gamma beams with high intensities will open new opportunities to investigate very neutron-rich fragments produced by photofission of 238U targets in a gas cell. Based on some simulations, a novel gas cell has been designed to produce, stop and extract 238U photofission fragments. The extraction time and efficiency of photofission fragments have been optimized by using SIMION simulations. According to these simulations, a high extraction efficiency and a short extraction time can be achieved for 238U photofission fragments in the gas cell, which will allow one to measure very neutron-rich fragments with short half-lives by using the IGISOL facility proposed at ELI-NP.
© The Authors, published by EDP Sciences, 2018
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