Neutron Standard Cross Sections for 1H and 6Li from R-Matrix Analyses and Microscopic Calculations for the N-N and 7Li Systems | Zendy

Gerald M. Hale | Zendy

Open Access

Neutron Standard Cross Sections for 1H and 6Li from R-Matrix Analyses and Microscopic Calculations for the N-N and 7Li Systems

Author(s) -

Gerald M. Hale

Publication year - 2005

Publication title -

aip conference proceedings

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.177

H-Index - 75

eISSN - 1551-7616

pISSN - 0094-243X

DOI - 10.1063/1.1944960

Subject(s) - cross section (physics) , matrix (chemical analysis) , neutron , physics , nuclear physics , work (physics) , r matrix , section (typography) , atomic physics , chemistry , computer science , quantum mechanics , chromatography , operating system

We present work on the N − N and 7Li systems that is relevant to the international effort to re‐evaluate the neutron standard cross sections. The R‐matrix analysis of the N − N system also determined the n‐p capture cross section for use in BBN modeling of light‐element abundances in the early universe with an uncertainty of less than 2.5 %. The R‐matrix results for the 6Li(n,t)4He cross section agree qualitatively with a microscopic RRGM calculation that uses semi‐realistic N‐N potentials. However, they disagree with some cross‐section measurements for the reaction, and with another evaluation.

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