出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：The DANCE (Detector for Advanced Neutron Capture Experiments) array at the LANSCE
spallation neutron source in Los Alamos has been used to measure neutron capture cross
sections for 175Lu and 176Lu with neutron energies from thermal up to 100 keV. Both isotopes
are of current interest for the s-process nucleosynthesis. 175Lu is an important waiting-point in
the s-process and 176Lu is a sensitive s-process thermometer. Three targets were used to perform
these measurements. One was a natural Lu foil of 31 mg/cm2 and the other two were
isotopically enriched targets of 175Lu (99.8%, ~1 mg/cm2 electro-deposited on Ti) and 176Lu
(99.9%, ~1 mg/cm2 mass separator deposited on aluminized mylar). The data analysis is in
progress. Preliminary cross sections have been obtained by normalizing the data to the known
thermal cross sections. A comparison of these data with recent experimental data of K.Wisshak
et al. and the evaluated data of ENDF B-VII will be presented.
