¹³²Sn + ⁹⁶Zr Reaction: A Study of Fusion Enhancement/Hindrance

Journal Article · Sat Nov 01 04:00:00 EDT 2008 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.78.054608· OSTI ID:951930

Vinodkumar, A M ^[1]; Loveland, Walter ^[1]; Neeway, James J ^[2]; Prisbrey, Landon ^[3]; Sprunger, Peter H ^[1]; Peterson, Don ^[1]; Liang, J Felix ^[2]; Shapira, Dan ^[2]; Gross, Carl J ^[2]; Varner, Jr, Robert L ^[2]; Kolata, Jim J ^[4]; Roberts, Amy ^[4]; Caraley, Anne L ^[5]

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1. Oregon State University
2. ORNL
3. Oregon State University, Corvallis
4. University of Notre Dame, IN
5. State University of New York, Oswego

Capture-fission cross sections were measured for the collision of the massive nucleus {sup 132}Sn with {sup 96}Zr at center-of-mass energies ranging from 192.8 to 249.6 MeV in an attempt to study fusion enhancement and hindrance in this reaction involving very neutron-rich nuclei. Coincident fission fragments were detected using silicon detectors. Using angle and energy conditions, deep inelastic scattering events were separated from fission events. Coupled-channels calculations can describe the data if the surface diffuseness parameter, a, is allowed to be 1.10 fm instead of the customary 0.6 fm. The measured capture-fission cross sections agree moderately well with model calculations using the dinuclear system model. If we use this model to predict fusion barrier heights for these reactions, we find the predicted fusion hindrance, as represented by the extra push energy, is greater for the more neutron-rich system, lessening the advantage of the lower interaction barriers with neutron-rich projectiles.

• Research Organization: Oak Ridge National Laboratory (ORNL); Holifield Radioactive Ion Beam Facility
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 951930
• Journal Information: Physical Review C, Journal Name: Physical Review C Journal Issue: 5 Vol. 78
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CAPTURE
CROSS SECTIONS
FISSION
FISSION FRAGMENTS
MATHEMATICAL MODELS
NEUTRON-RICH ISOTOPES
TIN 132
ZIRCONIUM 96