How the Pauli exclusion principle affects fusion of atomic nuclei

Simenel, C.; Umar, A. S.; Godbey, K.; Dasgupta, M.; Hinde, D. J.

doi:10.1103/physrevc.95.031601

How the Pauli exclusion principle affects fusion of atomic nuclei

Journal Article · Thu Mar 02 00:00:00 EST 2017 · Physical Review. C

DOI:https://doi.org/10.1103/physrevc.95.031601· OSTI ID:1536060

Simenel, C. ^[1]; Umar, A. S. ^[2]; Godbey, K. ^[2]; Dasgupta, M. ^[3]; Hinde, D. J. ^[3]

Australian National University, Canberra, ACT (Australia); DOE/OSTI
Vanderbilt University, Nashville, TN (United States)
Australian National University, Canberra, ACT (Australia)

The Pauli exclusion principle induces a repulsion between composite systems of identical fermions such as colliding atomic nuclei. Our goal is to study how heavy-ion fusion is impacted by this “Pauli repulsion.” Here we propose a new microscopic approach, the density-constrained frozen Hartree-Fock method, to compute the bare potential including the Pauli exclusion principle exactly. Pauli repulsion is shown to be important inside the barrier radius and increases with the charge product of the nuclei. Its main effect is to reduce tunneling probability. Pauli repulsion is part of the solution to the long-standing deep sub-barrier fusion hindrance problem.

View Accepted Manuscript (DOE)

Research Organization:: Vanderbilt University, Nashville, TN (United States)

Sponsoring Organization:: Australian Research Council; USDOE; USDOE Office of Science (SC)

Grant/Contract Number:: SC0013847

OSTI ID:: 1536060

Alternate ID(s):: OSTI ID: 1345550

Journal Information:: Physical Review. C, Journal Name: Physical Review. C Journal Issue: 3 Vol. 95; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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