rp-process nucleosynthesis at extreme temperature and density conditions

New lifetime measurements inPd109and the onset of deformation atN=60

“…In particular, the migration of the high-j, unique parity πg 9/2 orbital may induce isomerism along with a potentially strong influence on β-decay lifetimes. Additionally, such rapid shape changes like the one at N =60, could affect nuclear masses, neutron-capture cross sections, as well as β-decay lifetimes [68,69] potentially influencing r -process dynamics.…”

Beta-decay half-lives of 70Kr and 74Rb

“…Although the experimental half-lives makes the network calculations more reliable, the major uncertainties are still induced by the unknown atomic masses and level energies, as noted in (1). In the case of the 2p-capture of 68 Se, particularly large uncertainty is induced by its proton capture Q-value i.e.…”

“…Thus, the importance of the experimental data on half-lives as input of the network calculations is evident. Recently, Schatz et al (1) showed that, in the extreme conditions, the rapid proton capture process (2) can be proceed possibly up to A = 100 via two-proton (2p) capture reactions bridging the waiting points, for example at 68 Se and 72 Kr. In this paper we discuss the importance of the experimental half-life of the 2p capture daughter of the former nucleus, 70 Kr, for the process path.…”

Proton capture cross section ofGe72and astrophysical implications

“…Potential settings like mass-accreting white dwarf stars [9], fast proton captures in the neutrino-driven winds in core-collapse Type II supernovae (SNII) [10,11], and Type Ia SN explosions [12] are investigated to understand the underlying processes. * Electronic address: naqvi@nscl.msu.edu However, the most widely studied location remains the shock front of SNII passing through the O-Ne burning zone of massive stars [5,13,14].…”