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One- and two-electron atomic screening in fusion reactions

Shoppa, T. D. and Koonin, S. E. and Langanke, K. and Seki, R. (1993) One- and two-electron atomic screening in fusion reactions. Physical Review C, 48 (2). pp. 837-840. ISSN 0556-2813. doi:10.1103/PhysRevC.48.837.

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Recent laboratory experiments have measured fusion cross sections at center-of-mass energies low enough that the effects of atomic electrons are important. To extract the cross section for bare nuclei from these data (as required for astrophysical applications), it is necessary to understand these screening effects. We present a model in which the evolution of the electron wave function is treated dynamically in the time-dependent Hartree-Fock scheme, while the motion of the nuclei is treated classically. We have calculated screening in the d+2H and d+3He reactions and give the effective screening energy Ue at small internuclear separations as a function of E. The resulting Ue values do not exceed the previously established adiabatic limits, and thus cannot explain the higher screening energies derived from experiment.

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Additional Information:©1993 The American Physical Society. Received 11 May 1993. This work was supported in part by the National Science Foundation (Grants PHY90-13248, PHY91-15574), and by the Department of Energy (Contract No. DEFG03-87ER40347).
Subject Keywords:CROSS-SECTIONS
Issue or Number:2
Record Number:CaltechAUTHORS:SHOprc93
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:7159
Deposited By: Tony Diaz
Deposited On:11 Jan 2007
Last Modified:08 Nov 2021 20:40

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