New studies of nuclear decay {gamma}-rays from novae

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The cause of the nova outburst is a thermonuclear runaway (TNR) in hydrogen rich material transferred by a companion onto a white dwarf. Studies of this phenomenon have shown that the TNR produces large concentrations of the short lived positron unstable isotopes of the CNO nuclei which are transported to the surface by convection so that early in the outburst we expect significant numbers of radioactive decays to occur at the surface. The resulting {gamma}-ray emission may be detectable from nearby novae early in their outbursts. The TNR is also expected to produce substantial amounts of {sup 7}Be and {sup ... continued below

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6 p.

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Starrfield, S.; Truran, J.W. & Wiescher, M.C. November 1, 1997.

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  • Starrfield, S. Arizona State Univ., Tempe, AZ (United States). Dept. of Physics and Astronomy
  • Truran, J.W. Univ. of Chicago, IL (United States). Dept. of Astronomy and Astrophysics
  • Wiescher, M.C. Univ. of Notre Dame, IN (United States). Dept. of Physics

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The cause of the nova outburst is a thermonuclear runaway (TNR) in hydrogen rich material transferred by a companion onto a white dwarf. Studies of this phenomenon have shown that the TNR produces large concentrations of the short lived positron unstable isotopes of the CNO nuclei which are transported to the surface by convection so that early in the outburst we expect significant numbers of radioactive decays to occur at the surface. The resulting {gamma}-ray emission may be detectable from nearby novae early in their outbursts. The TNR is also expected to produce substantial amounts of {sup 7}Be and {sup 22}Na. Their decays also yield potentially detectable levels of {gamma}-ray emission for relatively nearby novae. We are also interested in the role played by novae in the production of the {approximately}2M{circle_dot} of {sup 26}Al found in the galaxy. In order to improve our predictions of this phenomenon, we have performed a new set of calculations of TNR`s on ONeMg and CO white dwarfs with an updated nuclear reaction network and opacities.

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6 p.

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OSTI as DE98000839

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  • 4. Compton symposium, Williamsburg, VA (United States), 27-30 Apr 1997

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  • Other: DE98000839
  • Report No.: LA-UR--97-2679
  • Report No.: CONF-9704154--
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 542046
  • Archival Resource Key: ark:/67531/metadc690885

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  • November 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • May 20, 2016, 1:35 p.m.

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Starrfield, S.; Truran, J.W. & Wiescher, M.C. New studies of nuclear decay {gamma}-rays from novae, article, November 1, 1997; New Mexico. (digital.library.unt.edu/ark:/67531/metadc690885/: accessed September 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.