Deformed shell effects in quasifission fragments
Abstract
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.
- Authors:
-
[1];
- 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
- Publication Date:
- Research Org.:
- Vanderbilt Univ., Nashville, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- OSTI Identifier:
- 1558011
- Alternate Identifier(s):
- OSTI ID: 1556832
- Grant/Contract Number:
- SC0013847
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review C
- Additional Journal Information:
- Journal Volume: 100; Journal Issue: 2; Journal ID: ISSN 2469-9985
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS
Citation Formats
Godbey, K., Umar, A. S., and Simenel, C. Deformed shell effects in Ca48+Bk249 quasifission fragments. United States: N. p., 2019.
Web. doi:10.1103/PhysRevC.100.024610.
Godbey, K., Umar, A. S., & Simenel, C. Deformed shell effects in Ca48+Bk249 quasifission fragments. United States. doi:10.1103/PhysRevC.100.024610.
Godbey, K., Umar, A. S., and Simenel, C. Mon .
"Deformed shell effects in Ca48+Bk249 quasifission fragments". United States. doi:10.1103/PhysRevC.100.024610. https://www.osti.gov/servlets/purl/1558011.
@article{osti_1558011,
title = {Deformed shell effects in Ca48+Bk249 quasifission fragments},
author = {Godbey, K. and Umar, A. S. and Simenel, C.},
abstractNote = {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.},
doi = {10.1103/PhysRevC.100.024610},
journal = {Physical Review C},
number = 2,
volume = 100,
place = {United States},
year = {2019},
month = {8}
}
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