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Sm-147(n,alpha) cross section measurements from 3 eV to 500 keV : implications for explosive nucleosynthesis reaction rates

Gledenov, Y. M. and Koehler, P. E. and Andrzejewski, J. and Guber, K. H. and Rauscher, T.. (2000) Sm-147(n,alpha) cross section measurements from 3 eV to 500 keV : implications for explosive nucleosynthesis reaction rates. Physical review. C, Nuclear physics, Vol. 62, H. 4 , 042801.

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Official URL: http://edoc.unibas.ch/dok/A5839322

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Abstract

We have measured the Sm-147(n, alpha) cross section from 3 eV to 500 keV. These data were used to test nuclear statistical models which must be relied on to calculate the rates for as yet unmeasurable reactions occurring in explosive nucleosynthesis scenarios. It was found that our data are in reasonably good agreement with the reaction rate predicted by an older model but that the sates predicted by two very recent models are roughly a factor of 3 different from the data (in opposite directions). A detailed analysis indicates the strong dependence on the employed optical alpha potentials. These results, together with counting rate estimates for future experiments indicate that (n, alpha) measurements will be useful for improving reaction rate predictions across the global range of masses needed for explosive nucleosynthesis calculations.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretische Physik Astrophysik (Thielemann)
UniBasel Contributors:Rauscher, Thomas
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:American Institute of Physics
ISSN:0556-2813
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:14 Sep 2012 07:18
Deposited On:14 Sep 2012 06:45

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