Physics
Scientific paper
Apr 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aps..apr.e1106y&link_type=abstract
American Physical Society, APS/AAPT Joint Meeting, April 18-21, 1997, abstract #E11.06
Physics
Scientific paper
The COMPTEL observation of 4.4 and 6.1 MeV gamma rays from the direction of the Orion Nebula led Clayton and Jin(D.D. Clayton and L. Jin, Ap.J., 451 (1995) 681) to propose that the production of the extinct ^26Al observed in meteorites was via the ^12C(^16O,^26Al) and ^16O(^16O,^26Al) reactions in the protosolar cloud by oxygen-rich cosmic rays with energies up to 10 MeV/amu. Results from the ^12C(^16O,^26Al) measurements of Bateman(N.P.T. Bateman, et al., Ap.J. 472 (1996) L119) indicate that this reaction could not have produced significant amounts of ^26Al in the solar nebula, unless almost all of the solar system ^16O had entered the nebula as high energy cosmic rays. Following up on this result, we have measured the yield of the ^16O(^16O,^26Al) and ^16O(^14N,^26Al) reactions. We have bombarded BeO samples with 85, 110, 135 MeV, and 155 MeV ^16O ions, and with 115 MeV ^14N ions. The ^26Al yield is measured by counting the beta-delayed gamma rays. The results will be presented.
Bateman Nicholas P. T.
Butt Yousaf M.
Chen Aiqing
Parker Peter D.
Yildiz Kazim Orhan
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