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Title: Fusion and quasifission dynamics in the reactions Ca 48 + Bk 249 and Ti 50 + Bk 249 using a time-dependent Hartree-Fock approach

Authors:
; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1286314
Grant/Contract Number:
SC0013847
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 94; Journal Issue: 2; Related Information: CHORUS Timestamp: 2016-08-08 18:10:12; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Umar, A. S., Oberacker, V. E., and Simenel, C. Fusion and quasifission dynamics in the reactions Ca 48 + Bk 249 and Ti 50 + Bk 249 using a time-dependent Hartree-Fock approach. United States: N. p., 2016. Web. doi:10.1103/PhysRevC.94.024605.
Umar, A. S., Oberacker, V. E., & Simenel, C. Fusion and quasifission dynamics in the reactions Ca 48 + Bk 249 and Ti 50 + Bk 249 using a time-dependent Hartree-Fock approach. United States. doi:10.1103/PhysRevC.94.024605.
Umar, A. S., Oberacker, V. E., and Simenel, C. 2016. "Fusion and quasifission dynamics in the reactions Ca 48 + Bk 249 and Ti 50 + Bk 249 using a time-dependent Hartree-Fock approach". United States. doi:10.1103/PhysRevC.94.024605.
@article{osti_1286314,
title = {Fusion and quasifission dynamics in the reactions Ca 48 + Bk 249 and Ti 50 + Bk 249 using a time-dependent Hartree-Fock approach},
author = {Umar, A. S. and Oberacker, V. E. and Simenel, C.},
abstractNote = {},
doi = {10.1103/PhysRevC.94.024605},
journal = {Physical Review C},
number = 2,
volume = 94,
place = {United States},
year = 2016,
month = 8
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevC.94.024605

Citation Metrics:
Cited by: 2works
Citation information provided by
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  • Excitation functions for shell-stabilized evaporation residues produced in 48 Ca -induced reactions with 154 Gd , 159 Tb , 162 Dy , and 165 Ho targets have been measured in experiments performed at the Cyclotron Institute at Texas A&M University. The examined energy range predominantly covers the 3 n and 4 n evaporation channels with higher cross sections measured for the 4 n products. The σ 4 n are nearly invariant within experimental uncertainty in reactions with 159 Tb , 162 Dy , and 165 Ho with the maxima at 12.6 ± 1.9, 12.6 ± 1.7, and 9.4 ± 1.3more » mb, respectively. For the reaction with 154 Gd , the maximum is slightly lower at 4.0 ± 0.6 mb. A simple model to describe the measured production cross sections was employed. Capture was estimated by using the “diffused barrier formula” from the “fusion by diffusion” model proposed by Swiatecki et al. [Phys. Rev. C 71, 014602 (2005)]. The fusion probability was estimated by using a phenomenological expression presented by Siwek-Wilczynska et al. [Int. J. Mod. Phys. E 17, 12 (2008)]. The survival probability was calculated according to the formula of Vandenbosch and Huizenga [Nuclear Fission (Academic, New York, 1973)], derived from transition-state theory. The best agreement is reached between calculation and experiment upon inclusion of collective effects in the calculation of the survival probability, shown previously to be important for production of weakly deformed nuclei. This, in turn, challenges the expectation that strong shell stabilization benefits the production cross section. The present data are compared with earlier studies on production of neutron-deficient nuclei in Ca-induced reactions with lanthanide targets.« less
  • At the National Ignition Facility, experiments are being performed to measure charged-particle stopping powers in the previously unexplored warm dense plasma regime. These measurements are done using reaction-in-flight (RIF) neutrons from an inertial confinement fusion system. RIF neutrons are produced with a continuum of energies up to 30 MeV. By making activation measurements utilizing threshold reactions for neutrons in the energy range of 15 < E n < 30 MeV , the number of RIF neutrons can be determined and from this the stopping power of the deuterium and tritium ions that produced the RIF neutrons can be inferred. Currently,more » the 169 Tm ( n , 3 n ) 167 Tm reaction has been used. However, in an effort to provide a secondary complimentary measurement, efforts are underway to make use of the 209 Bi ( n , 4 n ) 206 Bi reaction, with a threshold of 22.5 MeV. The cross sections were measured at the 10 MV tandem Van De Graaff accelerator at the Triangle Universities Nuclear Laboratory with quasimonoenergetic neutrons between 23.5 and 30.5 MeV, where few previous measurements have been made. Cross-section data are compared to calculations and other available measurements.« less
  • At the National Ignition Facility, experiments are being performed to measure charged-particle stopping powers in the previously unexplored warm dense plasma regime. These measurements are done using reaction-in-flight (RIF) neutrons from an inertial confinement fusion system. RIF neutrons are produced with a continuum of energies up to 30 MeV. By making activation measurements utilizing threshold reactions for neutrons in the energy range of 15 < E n < 30 MeV, the number of RIF neutrons can be determined and from this the stopping power of the deuterium and tritium ions that produced the RIF neutrons can be inferred. Currently, themore » 169Tm(n, 3n) 167Tm reaction has been used. However, in an effort to provide a secondary complimentary measurement, efforts are underway to make use of the 209Bi(n, 4n) 206Bi reaction, with a threshold of 22.5 MeV. The cross sections were measured in this paper at the 10 MV tandem Van De Graaff accelerator at the Triangle Universities Nuclear Laboratory with quasimonoenergetic neutrons between 23.5 and 30.5 MeV, where few previous measurements have been made. Finally, cross-section data are compared to calculations and other available measurements.« less
    Cited by 1