Physics – Nuclear Physics
Scientific paper
Oct 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aps..dnp.he003m&link_type=abstract
American Physical Society, Division of Nuclear Physics Annual Meeting, October 25-28, 2006, abstract #HE.003
Physics
Nuclear Physics
Scientific paper
The ^30P(p,γ)^31S reaction rate plays a crucial role in the synthesis of heavier elements in ONe nova outbursts. However, this rate is very uncertain due to the lack of spectroscopic information on the ^31S levels. We have measured differential cross sections for the ^32S(p,d)^31S reaction and determined excitation energies for 26 states in ^31S. Spins and parities were determined or constrained for strongly populated levels through a DWBA analysis. A total of 42 levels in ^31S were examined. A new ^30P(p,γ)^31S rate was calculated using this new resonance information. Our results indicate that the ^30P(p,γ)^31S rate is reduced by up to a factor of 10 at nova temperatures compared to an estimate made with a statistical reaction model. We have performed network calculations using the new rate. Production of elements in the Si-Ca region are found to be altered by as much as 30%. Important isotopic ratios such as ^12C/^13C, ^14N/^15N, ^26Al/^27Al and ^29,30Si/^28Si are found to agree well with observations on presolar grains of nova origin.
Bardayan Daniel W.
Blackmon Jeff C.
Fitzgerald Ryan P.
Guidry Mike
Hix William Raphael
No associations
LandOfFree
A new ^30P(p,γ)^31S reaction rate and its astrophysical implications does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A new ^30P(p,γ)^31S reaction rate and its astrophysical implications, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A new ^30P(p,γ)^31S reaction rate and its astrophysical implications will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-870356