A new technique for measuring astrophysically important (alpha,p) reactions

Conference · Sat Jan 01 04:00:00 EST 2011

OSTI ID:1042783

Chae, K Y ^[1]; Bardayan, Daniel W ^[2]; Nesaraja, Caroline D ^[2]; Smith, Michael Scott ^[2]; Ahn, S H ^[1]; Ayres, A ^[1]; Bey, A ^[1]; Jones, K L ^[1]; Pittman, S T ^[1]; Howard, M E ^[3]; O'Malley, Patrick ^[3]; KOZUB, RAYMOND L ^[2]; Matos, M ^[4]; Moazen, Brian ^[1]; Peters, W A ^[3]

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1. University of Tennessee, Knoxville (UTK)
2. ORNL
3. Rutgers University
4. Louisiana State University

Studying ({alpha},p) reactions of astrophysical interest with radioactive beams presents serious challenges because of the difficult nature of the target. We have developed a new approach for the measurement of ({alpha},p) reactions using heavy ion beams in inverse kinematics and have measured the {sup 4}He({sup 19}F,{sup 1}H){sup 22}Ne reaction as a demonstration. {sup 19}F beams were used at the Holifield Radioactive Ion Beam Facility (HRIBF) tandem accelerator in Oak Ridge National Laboratory (ORNL) to bombard a large scattering chamber filled with {sup 4}He gas. Recoiling protons from the reactions were detected by the large area annular silicon strip detector array (SIDAR). The {sup 19}F({alpha},p) and {sup 19}F({alpha},p') excitation functions were measured over the energy range of E{sub c.m.} {approx} 1-2.1 MeV, demonstrating the viability of the technique

• 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: 1042783
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
ENERGY RANGE
EXCITATION FUNCTIONS
HEAVY IONS
NUCLEI
ORNL
PROTONS
RADIOACTIVE ION BEAMS
SCATTERING
SILICON
UNIVERSE
VIABILITY