title: Photoexcitation of the high-spin J=8 isomer in (176)Yb using 8.5MeV end-point energy Bremsstrahlung.
abstract: Excitation of the 1049.8keV isomeric state (t1/2=11.4s, spin difference between ground and isomeric states ΔJ=8) in (176)Yb using Bremsstrahlung radiation is observed for the first time. In contrast to the photoexcitation of isomeric states in other nuclei with lower spin differences, where effective integrated cross-sections are of order tens to hundreds of barneV, an integrated cross-section of just 0.0484±0.066barneV is observed for (176)Yb.
authors.affiliation: Commonwealth Scientific and Industrial Research Organisation, Locked Bag 2005, Menai, NSW 2232, Australia. Electronic address: james.tickner@csiro.au.
authors.forename: James
authors.initials: J
authors.lastname: Tickner
keywords: Gamma activation; Isomer; Photoexcitation; Ytterbium-176