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Title: DANCEing with the Stars: Measuring Neutron Capture on Unstable Isotopes with DANCE

Abstract

Isotopes heavier than iron are known to be produced in stars through neutron capture processes. Two major processes, the slow (s) and rapid (r) processes are each responsible for 50% of the abundances of the heavy isotopes. The neutron capture cross sections of the isotopes on the s process path reveal information about the expected abundances of the elements as well as stellar conditions and dynamics. Until recently, measurements on unstable isotopes, which are most important for determining stellar temperatures and reaction flow, have not been experimentally feasible. The Detector for Advance Neutron Capture Experiments (DANCE) located at the Los Alamos Neutron Science Center (LANSCE) was designed to perform time-of-flight neutron capture measurements on unstable isotopes for nuclear astrophysics, stockpile stewardship, and reactor development. DANCE is a 4-{pi}BaF{sub 2} scintillator array which can perform measurements on sub-milligram samples of isotopes with half-lives as short as a few hundred days. These cross sections are critical for advancing our understanding of the production of the heavy isotopes.

Authors:
; ; ; ; ; ; ; ; ; ; ;  [1]; ;  [2];  [3]; ; ;  [4];  [5]
  1. Los Alamos National Laboratory, PO Box 1663, Los Alamos, NM 87545 (United States)
  2. Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94551 (United States)
  3. Idaho National Laboratory, PO Box 1625, Idaho Falls, ID 83415 (United States)
  4. North Carolina State University, Department of Physics, Raleigh, NC 27695 (United States)
  5. Gesellschaft fuer Schwerionenforschung (GSI), Plankstrasse 1, 64291 Darmstadt (Germany)
Publication Date:
OSTI Identifier:
21289631
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1099; Journal Issue: 1; Conference: CAARI 2008: 12. international conference on application of accelerators in research and industry, Fort Worth, TX (United States), 10-15 Aug 2008; Other Information: DOI: 10.1063/1.3120137; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ASTROPHYSICS; BARIUM FLUORIDES; CAPTURE; CROSS SECTIONS; DAYS LIVING RADIOISOTOPES; ELEMENT ABUNDANCE; FOUR-PI COUNTING; FOUR-PI DETECTORS; NEUTRON REACTIONS; NUCLEOSYNTHESIS; R PROCESS; S PROCESS; SOLID SCINTILLATION DETECTORS; TIME-OF-FLIGHT METHOD

Citation Formats

Couture, A, Bond, E, Bredeweg, T A, Fowler, M, Haight, R C, Jandel, M, Keksis, A L, O'Donnell, J M, Rundberg, R, Ullmann, J L, Vieira, D J, Wouters, J M, Agvaanluvsan, U, Becker, J A, Baker, J D, Bayarbadrahk, B, Chyzh, A, Dashdorj, D, and Reifarth, R. DANCEing with the Stars: Measuring Neutron Capture on Unstable Isotopes with DANCE. United States: N. p., 2009. Web. doi:10.1063/1.3120137.
Couture, A, Bond, E, Bredeweg, T A, Fowler, M, Haight, R C, Jandel, M, Keksis, A L, O'Donnell, J M, Rundberg, R, Ullmann, J L, Vieira, D J, Wouters, J M, Agvaanluvsan, U, Becker, J A, Baker, J D, Bayarbadrahk, B, Chyzh, A, Dashdorj, D, & Reifarth, R. DANCEing with the Stars: Measuring Neutron Capture on Unstable Isotopes with DANCE. United States. doi:10.1063/1.3120137.
Couture, A, Bond, E, Bredeweg, T A, Fowler, M, Haight, R C, Jandel, M, Keksis, A L, O'Donnell, J M, Rundberg, R, Ullmann, J L, Vieira, D J, Wouters, J M, Agvaanluvsan, U, Becker, J A, Baker, J D, Bayarbadrahk, B, Chyzh, A, Dashdorj, D, and Reifarth, R. Tue . "DANCEing with the Stars: Measuring Neutron Capture on Unstable Isotopes with DANCE". United States. doi:10.1063/1.3120137.
@article{osti_21289631,
title = {DANCEing with the Stars: Measuring Neutron Capture on Unstable Isotopes with DANCE},
author = {Couture, A and Bond, E and Bredeweg, T A and Fowler, M and Haight, R C and Jandel, M and Keksis, A L and O'Donnell, J M and Rundberg, R and Ullmann, J L and Vieira, D J and Wouters, J M and Agvaanluvsan, U and Becker, J A and Baker, J D and Bayarbadrahk, B and Chyzh, A and Dashdorj, D and Reifarth, R},
abstractNote = {Isotopes heavier than iron are known to be produced in stars through neutron capture processes. Two major processes, the slow (s) and rapid (r) processes are each responsible for 50% of the abundances of the heavy isotopes. The neutron capture cross sections of the isotopes on the s process path reveal information about the expected abundances of the elements as well as stellar conditions and dynamics. Until recently, measurements on unstable isotopes, which are most important for determining stellar temperatures and reaction flow, have not been experimentally feasible. The Detector for Advance Neutron Capture Experiments (DANCE) located at the Los Alamos Neutron Science Center (LANSCE) was designed to perform time-of-flight neutron capture measurements on unstable isotopes for nuclear astrophysics, stockpile stewardship, and reactor development. DANCE is a 4-{pi}BaF{sub 2} scintillator array which can perform measurements on sub-milligram samples of isotopes with half-lives as short as a few hundred days. These cross sections are critical for advancing our understanding of the production of the heavy isotopes.},
doi = {10.1063/1.3120137},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1099,
place = {United States},
year = {2009},
month = {3}
}