Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aps..apr.r2003b&link_type=abstract
American Physical Society, April Meeting, 2004, May 1-4, 2004, Denver, Colorado April 2004, MEETING ID: APR04, abstract #R2.003
Astronomy and Astrophysics
Astrophysics
Scientific paper
Nova explosions produce a nucleosynthesis very different than stellar burning and may be responsible for the origins of several odd-mass nuclei such as ^7Li, ^13C, ^15N, and ^17O. An understanding of the nova dynamics and resulting nucleosynthesis requires a combination of theoretical, observational, and experimental efforts. There is a long history of novae observations in all energies ranges, except in the γ-ray domain, where only recently have instruments become sensitive enough to view these sources. Potential targets of γ-ray observatories include ^7Be, ^18F, ^22Na, and ^26Al, and thus it is necessary to know the rates of nuclear reactions affecting the production of these isotopes in novae. In many instances, the best way to determine the rates of reactions on proton- rich nuclei is through measurements with radioactive beams. At the ORNL Holifield Radioactive Ion Beam Facility (HRIBF), we have made a series of direct and indirect measurements using radioactive ^17F and ^18F beams to constrain the production of ^18F in novae. We have combined the obtained data with the existing knowledge of the level structures of ^18,19Ne to calculate updated reaction rates for proton-induced reactions on ^17,18F. These rates have been used in nova nucleosynthesis calculations utilizing postprocessing methods with hydrodynamic trajectories. One result is that our new rates suggest a factor of two more ^18F (and 15,000 times more ^17O) are produced in the inner most regions of a nova compared to estimates with previous reaction rates. Experimental techniques, results, and astrophysical implications of this work will be presented.
No associations
LandOfFree
Nova Nucleosynthesis of Gamma-Ray Emitters and Radioactive Beam Measurements 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 Nova Nucleosynthesis of Gamma-Ray Emitters and Radioactive Beam Measurements, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nova Nucleosynthesis of Gamma-Ray Emitters and Radioactive Beam Measurements will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1180926