Bulletin of the American Physical Society
5th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Volume 63, Number 12
Tuesday–Saturday, October 23–27, 2018; Waikoloa, Hawaii
Session LB: Nuclear Reactions 1
9:00 AM–11:30 AM,
Saturday, October 27, 2018
Hilton
Room: Kohala 1
Chair: A.B. Balantekin, University of Wisconsin
Abstract ID: BAPS.2018.HAW.LB.10
Abstract: LB.00010 : Acceleration induced neutron emission in heavy nuclei
11:15 AM–11:30 AM
Presenter:
Nicolae Carjan
(National Institute of Physics and Nuclear Engineering ``Horia Hulubei'', PO Box MG-6, RO-76900, Bucharest, Romania)
Author:
Nicolae Carjan
(National Institute of Physics and Nuclear Engineering ``Horia Hulubei'', PO Box MG-6, RO-76900, Bucharest, Romania)
The quantum version of the "water-tank problem" is applied to the independent-particle nuclear shell-model . The question to answer is: to what extend the acceleration of a nucleus influences its single particle states? From the classical analogue, one expects the nucleus to loose its less bound nucleons if the acceleration is high enough. Most probable this could happen to neutrons since, contrary to protons, they are not protected by a Coulomb barrier.
To answer this question, we solve the time-dependent Schrodinger
equation, with a moving mean-field of Woods-Saxon type. The time evolution of a single-neutron state at the Fermi level in $^{236}U$ is calculated for $10^{-21}$ sec using a constant acceleration .
During this time the wave function oscillates with increasing amplitude until it
escapes in the direction oposite to the motion of the nucleus (12$\%$) . Then we switch off the acceleration and follow the wave packet for another $10^{-21}$ sec. During this uniform motion the wave packet continues to oscillate and escapes (2$\%$).
The acceleration chosen is larger than during the Coulomb repulsion of two equal fission fragments from $^{236}U$ but comparable with that attained during the collision of two $^{236}U$ nuclei .
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.HAW.LB.10
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