Radioactive nuclide production and isomeric state branching ratios in P + W reactions to 200 mev

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Calculations of nuclide yields from spallation reactions usually assume that the products are formed in their ground states. We are performing calculations of product yields from proton reactions on tungsten isotopes that explicitly account for formation of the residual nuclei in excited states. The Hauser-Feshbach statistical/preequilibrium code GNASH, with full accounting for angular momentum conservation and electromagnetic transitions, is utilized in the calculations. We present preliminary results for isomer branching ratios for proton reactions to 200 MeV for several products including the 31{minus}y, 16+ state in {sup l78}Hf and the 25-d, 25/2{minus} state in {sup 179}Hf. Knowledge of such branching ... continued below

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7 p.

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Young, P.G. & Chadwick, M.B. July 1, 1995.

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  • Young, P.G. Los Alamos National Lab., NM (United States)
  • Chadwick, M.B. Lawrence Livermore National Lab., CA (United States)

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Calculations of nuclide yields from spallation reactions usually assume that the products are formed in their ground states. We are performing calculations of product yields from proton reactions on tungsten isotopes that explicitly account for formation of the residual nuclei in excited states. The Hauser-Feshbach statistical/preequilibrium code GNASH, with full accounting for angular momentum conservation and electromagnetic transitions, is utilized in the calculations. We present preliminary results for isomer branching ratios for proton reactions to 200 MeV for several products including the 31{minus}y, 16+ state in {sup l78}Hf and the 25-d, 25/2{minus} state in {sup 179}Hf. Knowledge of such branching ratios, might be important for concepts such as accelerator production of tritium that utilize intermediate-energy proton reactions on tungsten.

Physical Description

7 p.

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INIS; OSTI as DE95015253

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  • ANS international conference on evaluation of emerging nuclear fuel cycle systems, Versailles (France), 11-14 Sep 1995

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  • Other: DE95015253
  • Report No.: LA-UR--95-1862
  • Report No.: CONF-950919--2
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 97172
  • Archival Resource Key: ark:/67531/metadc792663

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  • July 1, 1995

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  • Dec. 19, 2015, 7:14 p.m.

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  • March 1, 2016, 1:25 p.m.

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Young, P.G. & Chadwick, M.B. Radioactive nuclide production and isomeric state branching ratios in P + W reactions to 200 mev, article, July 1, 1995; New Mexico. (digital.library.unt.edu/ark:/67531/metadc792663/: accessed October 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.