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Dynamics of induced fission

Negele, J. W. and Koonin, S. E. and Möller, P. and Nix, J. R. and Sierk, A. J. (1978) Dynamics of induced fission. Physical Review C, 17 (3). pp. 1098-1115. ISSN 0556-2813. doi:10.1103/PhysRevC.17.1098.

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Induced fission of 236U is calculated in the time-dependent mean-field approximation assuming axial and reflection symmetry and omitting the spin-orbit interaction. Constrained static solutions are used to generate the appropriate initial condition and are compared in detail with results of macroscopic-microscopic calculations. Although dynamic mean-field results are strongly dependent upon an effective pairing gap, predicted observables are consistent with experiment for plausible values of the gap. Detailed comparisons with macroscopic models indicate that both a modified one-body dissipation and two-body viscosity yield observables similar to those of the mean-field theory, even though these physical dissipation mechanisms are fundamentally different.

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Additional Information:©1978 The American Physical Society. Received 18 October 1977. Several of the authors are indebted to N. Glendennihg for his kind hospitality and computer support at the Lawrence Berkeley Laboratory, where much of this work was carried out. In addition, P. Hoodbhoy and K.T.R. Davies made significant contributions to the development of the coordinate-space static HF and TDHF codes, respectively. We wish to acknowledge extensive discussions with H. Flocard, who has been concurrently investigating fission in collaboration with J. Błocki using a two-centered HO basis. Finally, we are grateful to W.J. Swiatecki for his critical comments concerning this manuscript, which reinforce our convictions expressed in the conclusions that many important questions remain to be resolved. This work was supported by the U.S. Energy Research and Development Administration under Contracts Nos. W-7405-ENG-36 and EY-76-C-02-3069.*000, and by the U.S. National Science Foundation under Contract No. PHY76-02724. [J.W.N., S.E.K., and A.J.S. were] Alfred P. Sloan Research Fellows.
Subject Keywords:Nuclear reactions, fission, 238U fission calculated in time dependent mean-field approximation and with modified liquid-drop model, comparison of dissipation mechanisms
Issue or Number:3
Record Number:CaltechAUTHORS:NEGprc78
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:8978
Deposited By: Tony Diaz
Deposited On:11 Oct 2007
Last Modified:08 Nov 2021 20:54

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