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Title: Gamow-Teller Strength in the Exotic Odd-Odd Nuclei {sup 138}La and {sup 180}Ta and Its Relevance for Neutrino Nucleosynthesis

Abstract

The Gamow-Teller strength distributions below the particle threshold in {sup 138}La and {sup 180}Ta, deduced from high-resolution measurements of the ({sup 3}He,t) reaction at 0 deg., allow us to evaluate the role of charged-current reactions for the production of these extremely rare nuclides in neutrino-nucleosynthesis models. The analysis suggests that essentially all {sup 138}La in the Universe can be made that way. Neutrino nucleosynthesis also contributes significantly to the abundance of {sup 180}Ta but the magnitude depends on the unknown branching ratio for population of the long-lived isomer.

Authors:
; ; ; ;  [1]; ; ;  [2];  [3];  [4]; ; ; ; ; ; ; ; ; ;  [5] more »;  [6];  [7] « less
  1. Institut fuer Kernphysik, Technische Universitaet Darmstadt, D-64289 Darmstadt (Germany)
  2. Department of Physics, Osaka University, Toyonaka, Osaka 560-0043 (Japan)
  3. School of Physics, University of the Witwatersrand, PO Wits, Johannesburg 2050 (South Africa)
  4. (South Africa)
  5. Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047 (Japan)
  6. Theoretical Astrophysics Group, MS B227, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
  7. (United States) (and others)
Publication Date:
OSTI Identifier:
20960140
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 98; Journal Issue: 8; Other Information: DOI: 10.1103/PhysRevLett.98.082501; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ABUNDANCE; BRANCHING RATIO; GAMOW-TELLER RULES; HELIUM 3 BEAMS; HELIUM 3 REACTIONS; ISOMERS; LANTHANUM 138; NEUTRINOS; NUCLEOSYNTHESIS; TANTALUM 180

Citation Formats

Byelikov, A., Kalmykov, Y., Neumann-Cosel, P. von, Richter, A., Shevchenko, A., Adachi, T., Fujita, Y., Shimbara, Y., Fujita, H., iThemba LABS, PO Box 722, Somerset West 7129, Fujita, K., Hatanaka, K., Kawase, K., Nakanishi, K., Sakamoto, N., Sakemi, Y., Shimizu, Y., Tameshige, Y., Tamii, A., Yosoi, M., Heger, A., and Department of Astronomy and Astrophysics, University of California, Santa Cruz, California 95064. Gamow-Teller Strength in the Exotic Odd-Odd Nuclei {sup 138}La and {sup 180}Ta and Its Relevance for Neutrino Nucleosynthesis. United States: N. p., 2007. Web. doi:10.1103/PHYSREVLETT.98.082501.
Byelikov, A., Kalmykov, Y., Neumann-Cosel, P. von, Richter, A., Shevchenko, A., Adachi, T., Fujita, Y., Shimbara, Y., Fujita, H., iThemba LABS, PO Box 722, Somerset West 7129, Fujita, K., Hatanaka, K., Kawase, K., Nakanishi, K., Sakamoto, N., Sakemi, Y., Shimizu, Y., Tameshige, Y., Tamii, A., Yosoi, M., Heger, A., & Department of Astronomy and Astrophysics, University of California, Santa Cruz, California 95064. Gamow-Teller Strength in the Exotic Odd-Odd Nuclei {sup 138}La and {sup 180}Ta and Its Relevance for Neutrino Nucleosynthesis. United States. doi:10.1103/PHYSREVLETT.98.082501.
Byelikov, A., Kalmykov, Y., Neumann-Cosel, P. von, Richter, A., Shevchenko, A., Adachi, T., Fujita, Y., Shimbara, Y., Fujita, H., iThemba LABS, PO Box 722, Somerset West 7129, Fujita, K., Hatanaka, K., Kawase, K., Nakanishi, K., Sakamoto, N., Sakemi, Y., Shimizu, Y., Tameshige, Y., Tamii, A., Yosoi, M., Heger, A., and Department of Astronomy and Astrophysics, University of California, Santa Cruz, California 95064. Fri . "Gamow-Teller Strength in the Exotic Odd-Odd Nuclei {sup 138}La and {sup 180}Ta and Its Relevance for Neutrino Nucleosynthesis". United States. doi:10.1103/PHYSREVLETT.98.082501.
@article{osti_20960140,
title = {Gamow-Teller Strength in the Exotic Odd-Odd Nuclei {sup 138}La and {sup 180}Ta and Its Relevance for Neutrino Nucleosynthesis},
author = {Byelikov, A. and Kalmykov, Y. and Neumann-Cosel, P. von and Richter, A. and Shevchenko, A. and Adachi, T. and Fujita, Y. and Shimbara, Y. and Fujita, H. and iThemba LABS, PO Box 722, Somerset West 7129 and Fujita, K. and Hatanaka, K. and Kawase, K. and Nakanishi, K. and Sakamoto, N. and Sakemi, Y. and Shimizu, Y. and Tameshige, Y. and Tamii, A. and Yosoi, M. and Heger, A. and Department of Astronomy and Astrophysics, University of California, Santa Cruz, California 95064},
abstractNote = {The Gamow-Teller strength distributions below the particle threshold in {sup 138}La and {sup 180}Ta, deduced from high-resolution measurements of the ({sup 3}He,t) reaction at 0 deg., allow us to evaluate the role of charged-current reactions for the production of these extremely rare nuclides in neutrino-nucleosynthesis models. The analysis suggests that essentially all {sup 138}La in the Universe can be made that way. Neutrino nucleosynthesis also contributes significantly to the abundance of {sup 180}Ta but the magnitude depends on the unknown branching ratio for population of the long-lived isomer.},
doi = {10.1103/PHYSREVLETT.98.082501},
journal = {Physical Review Letters},
number = 8,
volume = 98,
place = {United States},
year = {Fri Feb 23 00:00:00 EST 2007},
month = {Fri Feb 23 00:00:00 EST 2007}
}