The missing'' 3 sup + state of sup 18 Ne and explosive sup 17 F( p ,. gamma. ) burning

Journal Article · Mon Apr 01 04:00:00 EST 1991 · Physical Review, C (Nuclear Physics); (USA)

OSTI ID:5608281

Garcriaaa, A; Adelberger, E G; Magnus, P V; Markoff, D M; Swartz, K B ^[1]; Smith, M S; Hahn, K I; Bateman, N; Parker, P D ^[2]

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1. Nuclear Physics Laboratory GL-10, University of Washington, Seattle, Washington 98195 (USA)
2. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06511 (USA)

Wiescher, Goerres, and Thielemann suggested that a missing'' {ital J}{sup {pi}}=3{sup +} level in {sup 18}Ne should occur at {ital E}{sub {ital x}}{approx}4.33 MeV, only {approx}410 keV above the {sup 17}F+{ital p} threshold. They noted that this level would provide an {ital s}-wave resonance in the {sup 17}F({ital p},{gamma}) reaction, greatly increasing its thermonuclear reaction rate. This, in turn, would have a pronounced effect on the production of {sup 17}O and {sup 18}O in explosive stellar environments. We have searched for this level using the {sup 16}O({sup 3}He,{ital n}) reaction. High-resolution time-of-flight spectra show that the 3{sup +} level occurs at {ital E}{sub {ital x}}=4.561{plus minus}0.009 MeV, {approx}230 keV higher than suggested. The astrophysical consequences of this result are discussed.

• OSTI ID: 5608281
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Journal Name: Physical Review, C (Nuclear Physics); (USA) Vol. 43:4; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651320* -- Nuclear Properties & Reactions
A=6-19
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYONS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CHARGED-PARTICLE REACTIONS
DIRECT REACTIONS
ELEMENTARY PARTICLES
ENERGY LEVELS
EVEN-EVEN NUCLEI
FERMIONS
HADRONS
HELIUM 3 REACTIONS
HYDROGEN BURNING
ISOTOPES
LIGHT NUCLEI
MULTI-NUCLEON TRANSFER REACTIONS
NEON 18
NEON ISOTOPES
NEUTRONS
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
OPTICAL MODELS
OXYGEN 16 TARGET
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
STAR BURNING
TARGETS
TIME-OF-FLIGHT METHOD
TRANSFER REACTIONS
TWO-NUCLEON TRANSFER REACTIONS