Nuclear properties for astrophysical and radioactive-ion-beam applications (II)

Gamma Rays from Kilonova: A Potential Probe of r-process Nucleosynthesis

“…This network uses state-of-the-art nuclear physics inputs (e.g. Mumpower et al 2016Mumpower et al , 2017Möller et al 2019), including a robust treatment of capture rates as well as neutron-induced and β-delayed fission using a single theoretical framework (Mumpower et al 2018). Variation in uncertain nuclear properties, such as those from nuclear binding energies proceeds as in Mumpower et al (2015).…”

First determination of β -delayed multiple neutron emission beyond A=100 through direct neutron measurement: The P2nCaballero-Folch1, Dillmann2, Agramunt3 et al. 2018Phys. Rev. C130140View full textAdd to dashboardCite

“…The model which better reproduces the 136 Sb data is the KTUY [49] but the half-life predicted for 136 Te remains far from the experimental value. Regarding the QRPA-HF [51] model, it is the one which better reproduces the P 1n and P 2n values for both isotopes according the obtained experimental results.…”

“…The P 1n and P 2n values obtained in this work are summarized in Table V together with the previously available experimental values and theoretical predictions from several models, including the finite-range droplet model plus the quasiparticle random-phase approximation (FRDM+QRPA) [13], the density functional theory plus continuum QRPA plus relativistic QRPA(DF3+cQRPA+RQRPA) [47,48], the Koura-Tachibana-Uno-Yamada (KTUY) [49], the relativistic Hartree-Bogoliubov plus RQRPA (RHB+RQRPA) [50], the QRPA plus Hartree-Fock (QRPA-HF) [51], and the semi-empirical effective density model [52]. The P 1n value obtained for 136 Te, 1.47(6)%, is higher but in fair agreement with those reported in Refs.…”

Strong one-neutron emission from two-neutron unbound states in β decays of the r -process nuclei Ga86,87Yokoyama1, Grzywacz2, Rasco3 et al. 2019Phys. Rev. CSelf Cite14030View full textAdd to dashboardCite

“…Therefore, new data points are of critical importance. The predictions for the 86 Ga [5][6][7][8][9] range between 21% and 56% for P 1n and 7% and 44% for P 2n and it is difficult to judge their reliability based on a single data point, particularly when β3n or β4n decay becomes significant.…”

“…The fact that the nuclear half-lives for Ga isotopes are relatively long despite the large Q β values reflect the concentration of the B(GT) in highly excited neutronemitting states in Ge isotopes. The model by Möller et al [5,9] uses QRPA calculations to make predictions of P 1n,2n values and the model in principle reflects very similar shell-structure effects. The details of the model will result in a different strength distribution and delayed neutron emission probabilities.…”