I'll give a summary of recent results from TRIUMF-ISAC related to Nuclear Astrophysics, using both stopped and accelerated, stable and radioactive beams at a variety of facilities including DRAGON, GRIFFIN, TIGRESS and others. I'll also describe new developments and plans for experiments in the coming year that will be of astrophysical interest.
We present observational evidence that an aspherical hypernova explosion could have occurred in the first stars in the early universe. Our results are based on the first determination of a Zn abundance in an HST/COS high-resolution UV spectrum of a hyper metal-poor (HMP) star, HE 1327−2326, with Fe/H =−5.2. We determine [Zn/Fe] = 0.80±0.25 from a UV ZnI line at 2138 A, detected at...
The nuclear equation of state (EoS) and the electron-capture rates are among the main nuclear physics inputs used in core-collapse supernovae modeling. For these inputs, it is essential to know the nuclear masses as precisely as possible because the distribution of populated microstates strongly depends on them. In addition, the values of nuclear masses enter directly in the calculations of...
Near-Earth supernovae have recently become of great interest to the astronomical community. In the past decade, live (not decayed) radioactive $^{60}$Fe has been detected by several groups from sites around the world and on the Moon, indicating that a supernova occurred near Earth around 2-3 Myr ago. The Illinois group has demonstrated that a core-collapse supernova is the only viable source...
Radiative capture reactions, such as $(\alpha,\gamma)$, $(p,\gamma)$ and $(n,\gamma)$, are of fundamental importance to the study of nucleosynthesis of elements in
stellar cores, supernovae, etc. In the laboratory, these reactions are usually measured by bombarding gas targets or very thin films with particle beams. The low density of these targets and the sensitivity to background from...
