The odd–odd isotope 176Lu has a half-life of 4.08 1010 years, undergoing a decay to 176Hf. Since its formation is unambiguously s-process neutron capture, it long has been viewed as a possible s-process chro-nometer. However, due to a temperature-dependent coupling between the ground state and an isomer at 123 keV in the stellar photon bath, 176Lu might be an s-process thermometer instead. Starting with the astrophysical background, preliminary results from two NRF experiments, performed at the 4.3 MeV Stuttgart Dynamitron accelerator, will be reported. Furthermore, first results from photoactivation experiments on 176Lu will be presented.
|Publication status||Published - 2004|