Searching for Resonances in the Unbound Nucleus ⁶Be

Conference · Sun Mar 01 04:00:00 EST 2009

DOI:https://doi.org/10.1063/1.3120161· OSTI ID:951616

Chae, Kyung Yuk ^[1]; Bardayan, Daniel W. ^[1]; Blackmon Jr, Jeff ^[1]; Champagne, A. E. ^[2]; Fitzgerald, R. P. ^[2]; Grzywacz-Jones, Kate L. ^[1]; Johnson, Micah ^[1]; Kozub, R. L. ^[3]; Livesay, Jake ^[1]; Ma, Zhanwen ^[1]; Nesaraja, Caroline D. ^[1]; Pain, S. D. ^[4]; Smith, Michael Scott ^[1]; Thomas, J. S. ^[4]; Visser, D. W. ^[2]

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1. ORNL
2. University of North Carolina, Chapel Hill
3. Tennessee Technological University (TTU)
4. Rutgers University

Knowledge of the {sup 3}He({sup 3}He,2p){sup 4}He reaction is important for understanding stellar burning and solar neutrino production. Previous measurements have found a surprisingly large rise in the cross section at low energies that could be due to a low energy resonance in the {sup 3}He+{sup 3}He ({sup 6}Be) system or electron screening. In the {sup 6}Be nucleus, however, no excited states have been observed above the first 2{sup +} state at Ex = 1.67 MeV up to 23 MeV, even though several are expected. The d({sup 7}Be,t){sup 6}Be reaction has been studied for the first time to search for resonances in the {sup 6}Be nucleus that may affect our understanding of the {sup 3}He({sup 3}He,2p){sup 4}He reaction. A 100-MeV {sup 7}Be beam from the Holifield Radioactive Ion Beam Facility (HRIBF) was used to bombard CD{sub 2} targets, and tritons were detected by the Silicon Detector Array (SIDAR). It appears that a combination of reaction mechanisms is necessary to explain the observed triton energy spectrum.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 951616
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
CROSS SECTIONS
ELECTRONS
EXCITED STATES
PRODUCTION
RADIOACTIVE ION BEAMS
REACTION KINETICS
RESONANCE
SILICON
SOLAR NEUTRINOS
STAR BURNING
TARGETS
TRITONS