New Limits for the ¹⁸F(p,alpha)¹⁵O Rate in Novae

Conference · Fri Jul 01 04:00:00 EDT 2005

OSTI ID:931393

KOZUB, RAYMOND L ^[1]; Batchelder, Jon Charles ^[1]; Bardayan, Daniel W ^[1]; Blackmon, Jeff C ^[1]; Brune, Carl ^[1]; Champagne, Arthur E ^[1]; Cizewski, Jolie ^[1]; Davinson, Thomas ^[1]; Greife, Uwe ^[1]; Gross, Carl J ^[1]; Jewett, Cybele ^[1]; Livesay, Jake ^[1]; Ma, Zhanwen ^[1]; Moazen, Brian H ^[1]; Nesaraja, Caroline D ^[1]; Scott, J P ^[2]; Sahin, L ^[3]; Shapira, Dan ^[1]; Smith, Michael Scott ^[1]; Thomas, Jeffrey S ^[1]

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1. ORNL
2. Tennessee Technological University
3. University of North Carolina, Chapel Hill/Dumlupinar University, Kutahya, Turkey

The degree to which the (p, {gamma}) and (p,{alpha}) reactions destroy {sup 18}F at temperatures {approx}1-4x10 K is important for understanding the synthesis of nuclei in nova explosions and for using the long-lived radionuclide {sup 18}F, a target of gamma ray astronomy, as a diagnostic of nova mechanisms. The reactions are dominated by low-lying proton resonances near the {sup 18}F+p threshold (E=6.411 MeV in {sup 19}Ne). To gain further information about these resonances, we have used the d({sup 18}F,p){sup 19}F neutron transfer reaction to selectively populate corresponding mirror states in {sup 19}F. The results would suggest {sup 18}F(p,{gamma}){sup 19}Ne and {sup 18}F(p,{alpha}){sup 15}O reaction rates that are 2-3 times lower than reported previously.

• Research Organization: Oak Ridge National Laboratory (ORNL); Holifield Radioactive Ion Beam Facility
• Sponsoring Organization: ORNL LDRD Director's R&D
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 931393
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASTRONOMY
EXPLOSIONS
MIRRORS
NEUTRON TRANSFER
NOVAE
NUCLEI
PROTONS
RADIOISOTOPES
REACTION KINETICS
SYNTHESIS
UNIVERSE