Stellar ({ital n},{gamma}) cross section of the unstable isotope {sup 155}Eu
- Forschungszentrum Karlsruhe, Institut fuer Kernphysik, Postfach 3640, D-76021 Karlsruhe (Germany)
The stellar ({ital n},{gamma}) cross section of the comparably short-lived isotope {sup 155}Eu ({ital t}{sub 1/2}=4.96 yr) has been experimentally determined relative to that of gold by means of the activation method. A sample containing only 3.4{times}10{sup 14} {sup 155}Eu atoms was irradiated for 17 days in a quasistellar neutron spectrum corresponding to a thermal energy of {ital kT}=25 keV. The cross section obtained from the induced activity yields a value of {l_angle}{sigma}{times}{ital v}{r_angle}/{ital v}{sub {ital T}}=1320{plus_minus}80 mb at {ital kT}=30 keV. This result is of relevance for analyzing the abundance pattern in the {ital s}-process branchings at {ital A}=151, 152, and 154 with respect to the temperature during helium shell burning in low mass stars.
- OSTI ID:
- 55189
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 6 Vol. 51; ISSN 0556-2813; ISSN PRVCAN
- Country of Publication:
- United States
- Language:
- English
Similar Records
The stellar ({ital n},{gamma}) cross section of the unstable isotope {sup 163}Ho and the origin of {sup 164}Er
Moxon-Rae setup for the measurement of stellar ({ital n},{gamma}) rates and the example of {sup 87}Rb
S-process branching at /sup 151/Sm
Journal Article
·
Sat Jun 01 00:00:00 EDT 1996
· Astrophysical Journal
·
OSTI ID:286901
Moxon-Rae setup for the measurement of stellar ({ital n},{gamma}) rates and the example of {sup 87}Rb
Journal Article
·
Wed May 01 00:00:00 EDT 1996
· Physical Review, C
·
OSTI ID:283983
S-process branching at /sup 151/Sm
Journal Article
·
Wed Feb 29 23:00:00 EST 1984
· Astrophys. J.; (United States)
·
OSTI ID:6675265