Stellar (n,γ) cross section of the unstable isotope 155Eu

Details Stellar (n,γ) cross section of the unstable isotope 155Eu Stellar (n,γ) cross section of the unstable isotope 155Eu

Jun 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995phrvc..51.3465j&link_type=abstract

Physical Review C (Nuclear Physics), Volume 51, Issue 6, June 1995, pp.3465-3471

Physics

Nuclear Physics

13

Radiative Capture, Chromatography, 150<=A<=189, Stellar Structure, Interiors, Evolution, Nucleosynthesis, Ages

Scientific paper

The stellar (n,γ) cross section of the comparably short-lived isotope 155Eu (t1/2=4.96 yr) has been experimentally determined relative to that of gold by means of the activation method. A sample containing only 3.4×1014 155Eu atoms was irradiated for 17 days in a quasistellar neutron spectrum corresponding to a thermal energy of kT=25 keV. The cross section obtained from the induced activity yields a value of <σ×v>/vT=1320+/-80 mb at kT=30 keV. This result is of relevance for analyzing the abundance pattern in the s-process branchings at A=151, 152, and 154 with respect to the temperature during helium shell burning in low mass stars.

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