Search

Your search keyword '"Esposito, S."' showing total 2 results
2 results on '"Esposito, S."'

1. PArthENoPE: Public algorithm evaluating the nucleosynthesis of primordial elements

Author

Pisanti, O., Cirillo, A., Esposito, S., Iocco, F., Mangano, G., Miele, G., and Serpico, P.D.

Subjects
*PROGRAMMING languages, *DIFFERENTIAL equations, *COMPUTER operating systems, *FORTRAN, *WINDOWS (Graphical user interfaces)
Abstract

Abstract: We describe a program for computing the abundances of light elements produced during Big Bang Nucleosynthesis which is publicly available at http://parthenope.na.infn.it/. Starting from nuclear statistical equilibrium conditions the program solves the set of coupled ordinary differential equations, follows the departure from chemical equilibrium of nuclear species, and determines their asymptotic abundances as function of several input cosmological parameters as the baryon density, the number of effective neutrino, the value of cosmological constant and the neutrino chemical potential. The program requires commercial NAG library routines. Program summary: Program title: PArthENoPE Catalogue identifier: AEAV_v1_0 Program summary URL: http://cpc.cs.qub.ac.uk/summaries/AEAV_v1_0.html Program obtainable from: CPC Program Library, Queen''s University, Belfast, N. Ireland Licensing provisions: Standard CPC licence, http://cpc.cs.qub.ac.uk/licence/licence.html No. of lines in distributed program, including test data, etc.: 10 033 No. of bytes in distributed program, including test data, etc.: 46 002 Distribution format: tar.gz Programming language: Fortran 77 Computer: PC-compatible running Fortran on Unix, MS Windows or Linux Operating system: Windows 2000, Windows XP, Linux Classification: 1.2, 1.9, 17.8 External routines: NAG Libraries Nature of problem: Computation of yields of light elements synthesized in the primordial universe. Solution method: BDF method for the integration of the ODEs, implemented in a NAG routine. Running time: 90 sec with default parameters on a Dual Xeon Processor 2.4 GHz with 2 GB RAM. [Copyright &y& Elsevier]

Published
2008
Full Text
View/download PDF

2. Nuclear Reaction Network for Primordial Nucleosynthesis: a detailed analysis of rates, uncertainties and light nuclei yields

Author

Ofelia Pisanti, Salvatore Esposito, Gianpiero Mangano, Pasquale D. Serpico, Fabio Iocco, Gennaro Miele, Serpico, P. D., Esposito, S., Iocco, F., Mangano, G., Miele, Gennaro, and Pisanti, Ofelia

Subjects
Nuclear reaction, Physics, Nuclear Theory, Cosmic microwave background, Astrophysics (astro-ph), FOS: Physical sciences, Astronomy and Astrophysics, Neutrino decoupling, Astrophysics, Reaction rate, Nuclear physics, Nuclear Theory (nucl-th), High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Big Bang nucleosynthesis, Nucleosynthesis, Nuclide, Anisotropy, Nuclear Experiment
Abstract

We analyze in details the standard Primordial Nucleosynthesis scenario. In particular we discuss the key theoretical issues which are involved in a detailed prediction of light nuclide abundances, as the weak reaction rates, neutrino decoupling and nuclear rate modeling. We also perform a new analysis of available data on the main nuclear processes entering the nucleosynthesis reaction network, with particular stress on their uncertainties as well as on their role in determining the corresponding uncertainties on light nuclide theoretical estimates. The current status of theoretical versus experimental results for 2H, 3He, 4He and 7Li is then discussed using the determination of the baryon density as obtained from Cosmic Microwave Background anisotropies., LaTeX, 83 pages, 30 .pdf figures. Some typos in the units of R-functions in appendix D and relative plots fixed

Published
2004

Catalog

Books, media, physical & digital resources
See catalog results