874 research outputs found
From the microcosm of the atomic nuclei to the macrocosm of the stars
A necessary condition for the reliable modelling of the structure or
evolution of the stars and of their concomitant nucleosynthesis is the
availability of good quality nuclear data in a very wide area of the chart of
nuclides. This short review presents a non-exhaustive list of nuclear data of
astrophysics interest (masses, -decays, thermonuclear and
non-thermonuclear reaction rates) for nuclides at the bottom of the valley of
nuclear stability (mainly involved in the modelling of non-explosive phases of
stellar evolution), or for more or less highly exotic nuclides (to be
considered in the description of stellar explosions). Special emphasis is put
on the importance of providing quality nuclear data bases that can be easily
used by astrophysicists.Comment: 6 pages, To appear in Proceedings of International Conference on
Nuclear Data for Science and Technology 2007 (ND2007), Nice, Franc
Theoretical photo-disintegration of O
The photodisintegration of O is predicted to be dominated by 2
excitation in the vicinity of the -particle threshold.
The reaction rates of C(,)O are expected to be
determined from this reaction.Comment: 3 pages, 2 figures, Proceedings of Nuclei in the Cosmos (NIC-XIV).
19-24 June 2016, Niigata, Japa
A Whole-of-Society Approach to Global Health Policy in Japan : "Global Health and Human Security Program" of the Japan Center for International Exchange (JCIE)
Direct triple- process in non-adiabatic approach
Triple- reaction rates have been determined well with the sequential
process via the narrow resonances. However, the direct triple- process
at off-resonant energies still remains in unsolved problems. In the present
report, the direct triple- contribution is estimated with a
non-adiabatic method, and it is found to be 10--10 pb order in
photodisintegration cross sections of C(2 0) for
MeV. This is far below the values predicted by the recent
adiabatic models. In spite of the large difference, the derived rates are found
to be concordant with NACRE at the helium burning temperatures.Comment: 4 pages, 2 figures; Proceedings of 16th International Symposium on
Origin of Matter and Evolution of Galaxies (OMEG16), 25-28 October 2022,
Hanoi, Vietna
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