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Title: Synthesis of CNO elements in standard BBN

Authors:
; ; ;
Publication Date:
Research Org.:
Stanford Linear Accelerator Center (SLAC)
Sponsoring Org.:
USDOE
OSTI Identifier:
903301
Report Number(s):
SLAC-PUB-12477
TRN: US200722%%104
DOE Contract Number:
AC02-76SF00515
Resource Type:
Conference
Resource Relation:
Journal Name: POS; Conference: Presented at 9th International Symposium on Nuclear Astrophysics: Nuclei in the Cosmos (NIC IX), Geneva, Switzerland, 25-30 Jun 2006
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABUNDANCE; ASTROPHYSICS; NUCLEI; NUCLEOSYNTHESIS; PRODUCTION; STARS; Astrophysics,ASTRO

Citation Formats

Iocco, Fabio, /Naples U. /KIPAC, Menlo Park, Serpico, Pasquale D., and /Munich, Max Planck Inst. Synthesis of CNO elements in standard BBN. United States: N. p., 2007. Web.
Iocco, Fabio, /Naples U. /KIPAC, Menlo Park, Serpico, Pasquale D., & /Munich, Max Planck Inst. Synthesis of CNO elements in standard BBN. United States.
Iocco, Fabio, /Naples U. /KIPAC, Menlo Park, Serpico, Pasquale D., and /Munich, Max Planck Inst. Fri . "Synthesis of CNO elements in standard BBN". United States. doi:. https://www.osti.gov/servlets/purl/903301.
@article{osti_903301,
title = {Synthesis of CNO elements in standard BBN},
author = {Iocco, Fabio and /Naples U. /KIPAC, Menlo Park and Serpico, Pasquale D. and /Munich, Max Planck Inst.},
abstractNote = {},
doi = {},
journal = {POS},
number = ,
volume = ,
place = {United States},
year = {Fri May 11 00:00:00 EDT 2007},
month = {Fri May 11 00:00:00 EDT 2007}
}

Conference:
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  • We perform a reanalysis of the production of CNO elements in a standard Big Bang Nucleosynthesis scenario. The CNO yields in BBN are suppressed by the low density of the plasma, Coulomb barrier effects and the short time scales involved. Yet, the inclusion of nuclides and reactions traditionally disregarded may lead to an increase relevant enough to affect the pristine Population III stars. After a critical reanalysis and upgrade of the nuclear network our results show no major discrepancies with the ones obtained using a smaller nuclear network. The robustness of the standard predictions--the early generation of star developed inmore » a metal-free environment--is confirmed.« less
  • We perform a reanalysis of the production of CNO elements in a standard big bang nucleosynthesis scenario. The CNO yields in BBN are suppressed by the low density of the plasma, Coulomb barrier effects and the short time scales involved. Yet, the inclusion of nuclides and reactions traditionally disregarded may lead to an increase relevant enough to affect the pristine Population III stars. After a critical reanalysis and upgrade of the nuclear network our results show no major discrepancies with the ones obtained using a smaller nuclear network. The robustness of the standard predictions--the early generation of star developed inmore » a metal-free environment--is confirmed.« less
  • We perform an analysis of the production of elements with mass number A {ge} 12 in a standard Big Bang Nucleosynthesis scenario. The goal is to provide a more accurate estimate of the very low and yet poorly explored abundance of such elements, relevant for the pristine Population III stars. We examine the synthesis channels for these elements in a critically revised and updated version of the Wagoner-Kawano code, as well as in a further enlarged version including four additional nuclides and a significantly extended nuclear network. Our results show no major discrepancies with the ones obtained using a smallermore » nuclear network. The robustness of the standard predictions--the early generation of star developed in a metal-free environment--is confirmed.« less
  • We describe the parallelization of a radiation transport Monte Carlo simulation code that was used in the design of a particle detector.
  • We describe the PCP/PFP programming models which we are using on the BBN TC2000. The parallel programming models are implemented in a portable manner and will be useful on the scalable shared memory machines we expect to see in the future. We then describe the TC2000 machine architecture which is a scalable general purpose parallel architecture capable of efficiently supporting both shared memory and message passing programming paradigms. We also briefly describe a PCP implementation of the Gauss elimination algorithm which exploits the large local memories on the TC2000.