Physics
Scientific paper
May 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aps..apr.j8004l&link_type=abstract
American Physical Society, April Meeting, 2004, May 1-4, 2004, Denver, Colorado April 2004, MEETING ID: APR04, abstract #J8.004
Physics
Scientific paper
Recent WMAP measurements have determined the baryon density of the Universe Ωb within about 4%. With Ωb as an input, comparisons of BBN predictions to primordial abundance observations can be made and used to test BBN models and/or to further constrain abundances of isotopes with weak observational limits. To push the limits and improve constraints on BBN models, uncertainties in key nuclear reaction rates must be reduced. We have made new precise measurements of the d(d,p)t and d(d,n)^3He total cross sections in order to help reduce uncertainties in deuterium abundance predictions. Reaction rates calculated from our data are significantly higher than those in the widely used NACRE compilation. These differences will lead to modifications in BBN abundance predictions. The new data and ramifications will be discussed.
Boswell M. S.
Brune Carl R.
Clegg Thomas B.
Daniels T. V.
Fisher Brendan Michael
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