Nuclei in the Cosmos XV

Session

Nuclear data and astrophysics

28 Jun 2018, 14:45

"E. Fermi" conference room (LNGS)

Conveners

Nuclear data and astrophysics

• Gianluca Imbriani (Federico II University & INFN)

238. Mass measurements of short-lived nuclides in CSRe and its impact on some issues in nuclear astrophysics

Yu Hu Zhang (Institute of Modern Physics, CAS)

28/06/2018, 14:45

Invited

Recent commissioning of the Cooler Storage Ring at the Heavy Ion Research Facility in Lanzhou enabled us to conduct high-precision mass measurements at the Institute of Modern Physics in Lanzhou (IMP). In the past few years, mass measurements were performed using the CSRe-based isochronous mass spectrometry employing the fragmentation of the energetic beams of 36 Ar, 58 Ni, 78 Kr, 86 Kr, and...

112. Beta-delayed neutron emitters in the r‐process

Iris Dillmann (TRIUMF)

28/06/2018, 15:15

Invited

Beta-delayed neutron (beta-n)-emitters play an important, two-fold role in the stellar nucleosynthesis of heavy elements in the "rapid neutron-capture process" (r-process). On one hand they lead to a detour of the material $\beta$-decaying back to stability. On the other hand, the released neutrons increase the neutron-to-seed ratio, and are re-captured during the freeze-out phase and thus...

184. Experimental charged-particle (a,n) reaction studies relevant for the weak r-process

Fernando Montes (National Superconducting Cyclotron Laboratory)

28/06/2018, 15:45

Oral

Core-collapse Supernovae explosions are likely to produce at least some of the elements heavier than iron found in nature. Although the conditions are not adequate to produce the heaviest elements, those explosions powered by neutron-rich neutrino-driven winds can contribute to the galactic abundance of elements from iron all the way to silver and beyond. Charged-particle reactions in the...

109. Precise nuclear binding energies for the r process and core collapse

Anu Kankainen (University of Jyväskylä)

28/06/2018, 16:00

Oral

The r-process abundances depend sensitively on nuclear masses, i.e. binding energies. We have recently measured masses of several rare-earth nuclei with the JYFLTRAP Penning trap in Jyvaskyla and studied their impact on the r-process calculations. The rare-earth abundance peak at approx 165 forms during the later stages of the r-process and reflects both the astrophysical conditions as well as...

52. The beta-Oslo method: experimentally constrained (n,g reaction rates relevant to the r-process)

Ann-Cecilie Larsen (University of Oslo)

28/06/2018, 16:15

Oral

All elements found in our Universe, except for the very lightest ones, have been created during stars' lives and/or deaths. Burbidge, Burbidge, Fowler and Hoyle pointed out the slow neutron-capture and the rapid neutron-capture process to be the main contributors for producing elements from iron to uranium. On August 17, 2017, the LIGO and Virgo gravitational-wave detectors measured, for...

260. Assessment of Stellar Nucleosynthesis Abundances using ENDF/B-VIII.0 and TENDL-2015 Evaluated Nuclear Data Libraries Content

Boris Pritychenko (Brookhaven National Laboratory)

28/06/2018, 16:30

Evaluated Nuclear Data File (ENDF) libraries contain complete collections of reaction cross sections, angular distributions, fission yields and decay data. These data collections have been used worldwide in nuclear industry and national security applications. It represents a great interest to explore the recently-released ENDF/B-VIII.0 library for nuclear astrophysics purposes and compare...