scholarly journals Nuclear reaction network for primordial nucleosynthesis: a detailed analysis of rates, uncertainties and light nuclei yields

2004 ◽  
Vol 2004 (12) ◽  
pp. 010-010 ◽  
Author(s):  
P D Serpico ◽  
S Esposito ◽  
F Iocco ◽  
G Mangano ◽  
G Miele ◽  
...  
2020 ◽  
Vol 13 ◽  
pp. 18
Author(s):  
P. Demetriou

Nuclear reaction rates play a crucial role in nuclear astrophysics. In the last decades there has been an enormous effort to measure reaction cross sections and extensive experimental databases have been compiled as a result. In spite of these efforts, most nuclear reaction network calculations still have to rely on theoretical predic- tions of experimentally unknown rates. In particular, in astrophysics applications such as the s-, r- and p-process nucleosynthesis involving a large number of nuclei and nuclear reactions (thousands). Moreover, most of the ingredients of the cal- culations of reaction rates have to be extrapolated to energy and/or mass regions that cannot be explored experimentally. For this reason it is important to develop global microscopic or semi-microscopic models of nuclear properties that give an accurate description of existing data and are reliable for predictions far away from the stability line. The need for more microscopic input parameters has led to new devel- opments within the Hartree-Fock-Bogoliubov method, some of which are presented in this paper.


Author(s):  
P. Delbourgo-Salvador ◽  
E. Vangioni-Flam ◽  
G. Malinie ◽  
J. Audouze

2015 ◽  
Vol 130 (7) ◽  
Author(s):  
Benjamin Braunn ◽  
Alain Boudard ◽  
Jean-Christophe David ◽  
Arjan J. Koning ◽  
Anne Leprince ◽  
...  

2007 ◽  
Vol 667 (1) ◽  
pp. 476-488 ◽  
Author(s):  
W. Raphael Hix ◽  
Suzanne T. Parete‐Koon ◽  
Christian Freiburghaus ◽  
Friedrich‐Karl Thielemann

2017 ◽  
Vol 608 ◽  
pp. A28 ◽  
Author(s):  
N. Prantzos ◽  
C. Charbonnel ◽  
C. Iliadis

Context. Motivated by recent reports concerning the observation of limited enrichment in He but excess K in stars of globular clusters, we revisit the H-burning conditions that lead to the chemical properties of multiple stellar populations in these systems. Aims. In particular, we are interested in correlations of He and K with other elements, such as O, Na, Al, Mg and Si, reported in stars of NGC 2808. Methods. We performed calculations of nucleosynthesis at constant temperature and density, exploring the temperature range of 25 to 200 × 106 K (25 to 200 MK), using a detailed nuclear reaction network and the most up-to-date nuclear reaction rates. Results. We find that Mg is the most sensitive “thermometer” of hydrostatic H-burning conditions, pointing to a temperature range of 70–80 MK for NGC 2808, while He is a lesser – but not negligible – constraint. Potassium can be produced at the levels reported for NGC 2808 at temperatures >180 MK and Si at T > 80 MK. However, in the former temperature range Al and Na are totally destroyed and no correlation can be obtained, in contrast to the reported observations. None of the putative polluter sources proposed so far seem to satisfy the ensemble of nucleosynthesis constraints.


2005 ◽  
Vol 14 (01) ◽  
pp. 85-93 ◽  
Author(s):  
PETR NAVRÁTIL

There has been significant progress in the ab initio approaches to the structure of light nuclei. One such method is the ab initio no-core shell model (NCSM). Starting from the realistic two- and three-nucleon interactions, this method can predict the low-lying levels in p-shell nuclei. It is a challenging task to extend the ab initio methods to describe nuclear reactions. In this contribution, we present a brief overview of the NCSM with examples of recent applications as well as the first steps taken toward nuclear reaction applications.


2017 ◽  
Vol 233 (2) ◽  
pp. 18 ◽  
Author(s):  
Jonas Lippuner ◽  
Luke F. Roberts

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