skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Explosive Nucleosynthesis in Different Ye Conditions

Abstract

No abstract prepared.

Authors:
 [1];  [2];  [2];  [2];  [3];  [4]
  1. Japan Atomic Energy Agency (JAEA)
  2. University of Tokyo, Japan
  3. Universitat Basel, Switzerland
  4. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
939157
DOE Contract Number:
AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Journal Volume: 847; Conference: Origin of Matter and Evolution of Galaxies (OMEG05), Tokyo, Japan, 20051108, 20051111
Country of Publication:
United States
Language:
English

Citation Formats

Iwamoto, Nobuyuki, Umeda, Hideyuki, Nomoto, Ken'ichi, Tominaga, Nozomu, Thielemann, Friedrich-Karl W., and Hix, William Raphael. Explosive Nucleosynthesis in Different Ye Conditions. United States: N. p., 2006. Web. doi:10.1063/1.2234441.
Iwamoto, Nobuyuki, Umeda, Hideyuki, Nomoto, Ken'ichi, Tominaga, Nozomu, Thielemann, Friedrich-Karl W., & Hix, William Raphael. Explosive Nucleosynthesis in Different Ye Conditions. United States. doi:10.1063/1.2234441.
Iwamoto, Nobuyuki, Umeda, Hideyuki, Nomoto, Ken'ichi, Tominaga, Nozomu, Thielemann, Friedrich-Karl W., and Hix, William Raphael. Sun . "Explosive Nucleosynthesis in Different Ye Conditions". United States. doi:10.1063/1.2234441.
@article{osti_939157,
title = {Explosive Nucleosynthesis in Different Ye Conditions},
author = {Iwamoto, Nobuyuki and Umeda, Hideyuki and Nomoto, Ken'ichi and Tominaga, Nozomu and Thielemann, Friedrich-Karl W. and Hix, William Raphael},
abstractNote = {No abstract prepared.},
doi = {10.1063/1.2234441},
journal = {},
number = ,
volume = 847,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2006},
month = {Sun Jan 01 00:00:00 EST 2006}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share:
  • The influence of a large variation of Ye on explosive yield is investigated. We calculate nucleosynthesis with the initial electron fraction Ye ranging from 0.48 to 0.58 in explosive Si burning region in Population III, 25 M{center_dot} supernovae. We obtain the significant overproduction of odd elements, K and Sc. In the Ye < 0.5 cases light p-process nuclei are enhanced. We find that the abundance pattern taken from arbitrary mixture of each nucleosynthesis yield in various values of Ye can reasonably explain that in observed extremely metal-poor stars.
  • No abstract prepared.
  • A number of new isotopes in the iron region, both neutron-rich and proton-rich, have been produced at the Argonne FN tandem using heavy-ion beams. On the neutron-rich side, masses and beta-decay schemes were obtained, and the masses will be compared with various mass formulae used in nucleosynthesis calculations. Several heavy proton-rich N = Z odd-odd nuclei extending up from /sup 62/Ga were investigated with the aim of measuring the ft-values of their superallowed Fermi decays. The resulting ft-values will be compared with those found for the well studied lighter nuclei between /sup 14/O and /sup 54/Co. 11 references
  • Measurements of (n,p) and (n,{alpha}) cross sections are crucial for a better understanding of many scenarios of nucleosynthesis. Current problems in which such reactions play a roll include the possible synthesis of heavy element during the big bang. The production of several rare isotopes in explosive nucleosynthesis, and a better understanding of the role of the s process in the synthesis of light and intermediate mass nuclei. We have recently completed measurements of several (n,p) and (n,{alpha}) cross sections of importance to nuclear astrophysics. The cross sections were measured in the range from thermal energy to approximately 1 MeV bymore » using the white neutron source at the Manuel Lujan, Jr. Neutron Scattering Center (LANSCE) in Los Alamos. We have also made complementary measurements at the Karlsruhe Van de Graaff and at thee Oak Ridge Electron Linear Accelerator (ORELA). We discuss the impact of the results on nuclear astrophysics as well as recent improvements and future plans.« less