Deformed shell effects in Ca48+Bk249 quasifission fragments

Godbey, K.; Umar, A. S.; Simenel, C.

doi:10.1103/PhysRevC.100.024610

Title: Deformed shell effects in ${}^{48}{Ca} + {}^{249}{Bk}$ quasifission fragments

Journal Article · Mon Aug 12 00:00:00 EDT 2019 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.100.024610· OSTI ID:1558011

Godbey, K. ^[1];

^[1]; Simenel, C. ^[2]

Vanderbilt Univ., Nashville, TN (United States). Dept. of Physics and Astronomy
Australian National Univ., Canberra, ACT (Australia). Research School of Physics and Engineering, Dept. of Theoretical Physics and Dept. of Nuclear Physics

Background: Quasifission is the main reaction channel hindering the formation of superheavy nuclei (SHN). Its understanding will help to optimize entrance channels for SHN studies. Quasifission also provides a probe to understand the influence of shell effects in the formation of the fragments. Purpose: Investigate the role of shell effects in quasifission and their interplay with the orientation of the deformed target in the entrance channel. Methods: ⁴⁸Ca + ²⁴⁹Bk collisions are studied with the time-dependent Hartree-Fock approach for a range of angular momenta and orientations. Results: Unlike similar reactions with a ²³⁸U target, no significant shell effects which could be attributed to the ²⁰⁸Pb “doubly magic” nucleus are found. However, the octupole deformed shell gap at N = 56 seems to strongly influence quasifission in the most-central collisions. Conclusions: Shell effects similar to those observed in fission affect the formation of quasifission fragments. Mass-angle correlations could be used to experimentally isolate the fragments influenced by N = 56 octupole shell gaps.

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Research Organization:: Vanderbilt Univ., Nashville, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: SC0013847

OSTI ID:: 1558011

Alternate ID(s):: OSTI ID: 1556832

Journal Information:: Physical Review C, Vol. 100, Issue 2; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 29 works

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