Using New Fission Data with the Multi-detector Analysis System for Spent Nuclear Fuel Page: 4 of 13
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setup called for placing a target of 235U in the thermal neutron beam provided by
IPNS and collecting data on the resulting induced fission events. This measurement
was started in June 1998 and was allowed to run for a period of several weeks of
beam time to obtain in excess of 109 events. The data-taking phase for 235U
measurement ended in December 1998. The raw event data are stored on a
computer medium, and will be analyzed to identify decay modes, gamma-ray
signatures, nuclear structure, radiation multiplicities, and other relevant parameters
involved with fundamental nuclear physics research.
Table 1. Fission Pairs with Gamma Rays Observed in Spectra but Partner is
Observed Fission Unknown Partner Unknown Partner Unknown Partner
Isotope for 2N for 3N for 4N
138Ba (1435 keV) 95Kr 94Kr 93
44Ba (602 key) Kr 91Kr
40Ce (1596 keV) 92Se
142Ce (641 key) 90Se
96Zr (1750 keV) 137Te
The plan is to follow the 235U measurement with additional measurements
involving other fissile isotopes important to the SNF effort. In addition to the
continued data collection effort, analysis of the 235U target data and the earlier
spontaneous fission data will continue. The fact that new decay modes have been
observed in the spontaneous fission raises the question, "Do these decay modes
exist in induced fission?' This requires a comparison between the data sets.
397144Ce 2+ e+
29713vTe 4+ 2+
40000 331144Ba +
3 42B 2+ eas > w 80+x .
30000 277 370 381 4 e 2. > z~Fgur 2
2893 0 2 3 401 46 7
2]Z_ 28 3030 #5 3" 34 36 410 4246
l 69]~ 58 6
98CON1126 submitted to World Scientific : 7/8/99: 11:01 AM
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Cole, Jerald Donald. Using New Fission Data with the Multi-detector Analysis System for Spent Nuclear Fuel, article, November 1, 1998; [Idaho Falls, Idaho]. (digital.library.unt.edu/ark:/67531/metadc887123/m1/4/: accessed September 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.