Proton threshold states in /sup 26/Al and their role in astrophysics
The energy levels of /sup 26/Al between E/sub x/ = 6.3 and 6.5 MeV, corresponding to proton threshold energies in the /sup 25/Mg + p reaction from E/sub p/ = 0 to 200 keV, have been investigated using the reactions /sup 27/Al(/sup 3/He,..cap alpha..)/sup 26/Al and /sup 24/Mg(/sup 3/He,p)/sup 26/Al. Despite early work reporting a doublet at E/sub x/ 6346 keV and E/sub x/ = 6362 keV, most subsequent work reported a single state with conflicting spin and parity assignments. By measuring the spectroscopic factors of these states from the /sup 25/Mg(/sup 3/He,d)/sup 26/Al reaction, resonance strengths, omega..gamma.., of the proton threshold states in /sup 26/Al corresponding to the /sup 25/Mg(p,..gamma..)/sup 26/Al reaction have been deduced. The limits on the branching ratios from these states to the ground state of /sup 26/Al have been obtained by using the reaction /sup 27/Al(/sup 3/He,..cap alpha gamma..)/sup 26/Al. Finally by combining the results of the above experiments, stellar reaction rates of the /sup 25/Mg(p,..gamma..)/sup 26/Al reaction have been calculated. The results conclude that the production rate of /sup 26/Al in stellar environments from the reaction /sup 25/Mg(p,..gamma..)/sup 26/Al is substantially higher than what was calculated from other work.
- Research Organization:
- Ohio State Univ., Columbus (USA)
- OSTI ID:
- 5571355
- Country of Publication:
- United States
- Language:
- English
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71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALUMINIUM 26
ALUMINIUM 27 TARGET
ALUMINIUM ISOTOPES
BARYON REACTIONS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
BRANCHING RATIO
CAPTURE
CHARGED-PARTICLE REACTIONS
DATA
DIRECT REACTIONS
ENERGY LEVELS
ENERGY RANGE
EXPERIMENTAL DATA
HADRON REACTIONS
HELIUM 3 REACTIONS
INFORMATION
ISOTOPES
LIGHT NUCLEI
MAGNESIUM 25 TARGET
MEV RANGE
MEV RANGE 01-10
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEOSYNTHESIS
NUMERICAL DATA
ODD-ODD NUCLEI
PROTON REACTIONS
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SPECTROSCOPIC FACTORS
STRIPPING
SYNTHESIS
TARGETS
TRANSFER REACTIONS
YEARS LIVING RADIOISOTOPES