Conveners
Poster session - I
- Lê Xuân Chung (Inst)
Triple-alpha reaction plays an important role in nucleosynthesis heavier than 12C, because no stable nuclei exist in mass number A=5 and A=8 [1,2]. Followed by 12C(alpha,gamma)16O, it controls the C/O ratio at the end of helium burning phase in stars, and it affects up to the nucleosynthesis in supernova explosion. In contrast to 12C(alpha,gamma)16O, the 3-alpha reaction is currently...
The fragments of one of the Chelyabinsk meteorite shower were investigated by methods of neutron physics. The source of thermal neutrons was the IBR-2 pulsed reactor (Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna). The neutron activation elemental analysis (NAA) of the meteorite was carried out for 10 major and 17 trace elements [1]. Comparison with the...
The calculation of the r-process abundance depends on either nuclear inputs or dynamical conditions of the astrophysical sites. In the present study, we study the sensitivity of the r-process abundance to the alpha-decay rates and fission barriers of heavy nuclei. The alpha-decay half-lives were estimated using semi-empirical models and taken from the newly updated database (NUBASE2020). The...
The isobaric single charge-exchange reactions, which are determined directly by the Fermi transition ($\Delta L = 0, \Delta S = 0, \Delta T = 1$) between the isobaric analog state (IAS) and the ground state of target, can be used as a tool to study bulk properties of nuclear matter and probed the neutron skin thickness in heavy nucleus. In this work, the ($^3$He,$t$)IAS reactions are studied...
Nuclear mass is one of the most important input for nucleosynthesis calculations at extreme conditions. However, the masses of exotic isotopes usually have large uncertainties since they are only predicted by various models due to the difficulties in the measurements that originate from their short life-times and low production cross sections. The precise mass of exotic nucleus may provide new...
The electrostatic accelerator (ESA) EG-5 occupies its unique niche as part of the complex of nuclear physics facilities of the FLNP JINR (Dubna, Russian Federation). The beams of high-energy particles (H+, He+, D+) produced using EG-5 have high energy stability (± 15 keV per 2 MeV), which makes it possible to conduct unique studies of the elemental composition of solids (meteorites), including...