The decay of the new isotope180Yb and the search for ther-Process path to180mTa

Abstract

Irradiating natW/Ta targets with 186W, the decay of the new isotope a8~ was observed and its half-life determined to be 2.4(5) min. Based on the measured fl-, y-and X-ray data, the r-process production of 18~ and the role of a possible isomer 18~ in this context are discussed.

Allowed-unhindered β decay ofYb180and the nuclear structure ofLuMeißner1, Hild2, Kunze3 et al. 1995Phys. Rev. CSelf Cite2000View full textAdd to dashboardCite

“…The catcher temperature was 2400 K. The suppression of Lu reached a factor of 10 as compared to the thermal ion sources used in earlier experiments [4,10,14,18,19] second. Hence the progress in the ion-source developments is regarded as a major advantage in these studies .…”

“…However, these predictions are still awaiting further experimental confirmation [4,14,15]. In 1987 the decay of the precursor Yb~the heaviest known ytterbium isotope, was discovered but only limited information on the Lu level structure could be deduced [14]. We report here on an experiment aimed to reinvestigate the P decay of isoYb to states in isoLu.…”

“…In particular, the identification of the P decay of Lu to the 1608 keV 4+ state in Hf as an allowed, unhindered transition in a recent analysis [13] strongly supports the 5+ as-signrnent for the Lu ground state. However, these predictions are still awaiting further experimental confirmation [4,14,15]. In 1987 the decay of the precursor Yb~the heaviest known ytterbium isotope, was discovered but only limited information on the Lu level structure could be deduced [14].…”

Spectroscopic investigations of179Yb-decay including a Ms-isomer in Lu

“…The decay data, obtained for these isotopes, are of considerable nuclear-structure interest in view of the interplay of/32, /34 and fl6-deformations [-1]. Furthermore, such studies are relevant to the understanding of the astrophysical nucleosynthesis path to the rarest isotope in nature, ls~ [1,4,6]. So far, the decay schemes of the new isotopes in this region have been established [1][2][3][4][5] with the exception of 179yb.…”

Production of Hafnium Nuclides in the Reactions of 6.3- to 24.6-MeV/Nucleon 40Ar Ions with Natural längsten

“…above the region of classical fission products [1][2][3][4]. Meissner et al [5] measured the yields of projectile-like products in the MNTR of 11,4-MeV/nucleon 209 Bi ions with natural tungsten.…”