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Title: Photoneutron Cross Sections of Astrophysical Significance

Abstract

Presented in this paper are some of the latest measurements of photoneutron cross sections of direct relevance to the p-process nucleosynthesis in the context of the statistical model of compound nuclear reactions. We discuss the p-process origin of the rarest nuclide and the only naturally occurring isomer 180Tam, a serious underproduction problem of 138La, and the nuclear level density of 180Ta determined from the partial photoneutron cross section for 180Tam. As the laser-Compton scattering {gamma} ray at AIST has enabled one to directly determine ({gamma},n) cross sections, the blackbody synchrotron radiation to be produced by a ten-Tesla superconducting wiggler at SPring-8 is expected to be a promising tool for exploring ({gamma},{alpha}) and ({gamma},p) reactions in the future.

Authors:
 [1]
  1. Department of Physics, Konan University, Higashinada, Kobe 658-8501 (Japan)
Publication Date:
OSTI Identifier:
21056758
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 891; Journal Issue: 1; Conference: 6. Symposium on nuclear physics, Tours (France), 5-8 Sep 2006; Other Information: DOI: 10.1063/1.2713534; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ALPHA PARTICLES; ASTROPHYSICS; COMPTON EFFECT; CROSS SECTIONS; ENERGY-LEVEL DENSITY; GAMMA RADIATION; ISOMERIC NUCLEI; LANTHANUM 138; NUCLEOSYNTHESIS; PHOTON-NUCLEON INTERACTIONS; PHOTONEUTRONS; PHOTONUCLEAR REACTIONS; SPRING-8 STORAGE RING; STATISTICAL MODELS; SYNCHROTRON RADIATION; TANTALUM 180

Citation Formats

Utsunomiya, H. Photoneutron Cross Sections of Astrophysical Significance. United States: N. p., 2007. Web. doi:10.1063/1.2713534.
Utsunomiya, H. Photoneutron Cross Sections of Astrophysical Significance. United States. doi:10.1063/1.2713534.
Utsunomiya, H. Mon . "Photoneutron Cross Sections of Astrophysical Significance". United States. doi:10.1063/1.2713534.
@article{osti_21056758,
title = {Photoneutron Cross Sections of Astrophysical Significance},
author = {Utsunomiya, H.},
abstractNote = {Presented in this paper are some of the latest measurements of photoneutron cross sections of direct relevance to the p-process nucleosynthesis in the context of the statistical model of compound nuclear reactions. We discuss the p-process origin of the rarest nuclide and the only naturally occurring isomer 180Tam, a serious underproduction problem of 138La, and the nuclear level density of 180Ta determined from the partial photoneutron cross section for 180Tam. As the laser-Compton scattering {gamma} ray at AIST has enabled one to directly determine ({gamma},n) cross sections, the blackbody synchrotron radiation to be produced by a ten-Tesla superconducting wiggler at SPring-8 is expected to be a promising tool for exploring ({gamma},{alpha}) and ({gamma},p) reactions in the future.},
doi = {10.1063/1.2713534},
journal = {AIP Conference Proceedings},
number = 1,
volume = 891,
place = {United States},
year = {Mon Feb 26 00:00:00 EST 2007},
month = {Mon Feb 26 00:00:00 EST 2007}
}