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Delayed neutron energy spectra of /sup 93 -97/Rb

Conference ·
OSTI ID:5454901
Sets of high-statistical-quality delayed-neutron energy spectra were obtained from the precursor nuclides /sup 93 -97/Rb covering an energy range from approx. 10 keV to approx. 1300 keV. The data for each of the Rb isotopes show good qualitative agreement with the /sup 3/He ionization chamber data at energies greater than or equal to 200 keV. In addition, they provide definitive spectral information down to approx. 10 keV. Fine structure in this lower energy region with energy resolution much better than that obtained using /sup 3/He ionization chambers was observed, i.e., the FWHM varies from approx. 2 keV at 10 keV to approx. 12 keV at 200 keV. A notable feature the data is that they confirm the existence of strong 14.1 and 26.4 keV lines in the /sup 95/Rb spectrum. Furthermore, the value of 10.4% we obtain for the relative intensity of the 14.1-keV line is significantly greater than the values of 5.9%/sup 3/ and 4%/sup 4/ inferred from /sup 3/He spectrometry.
Research Organization:
EG and G Idaho, Inc., Idaho Falls (USA)
DOE Contract Number:
AC07-76ID01570
OSTI ID:
5454901
Report Number(s):
EGG-M-14183; CONF-831047-107; ON: DE84003025
Country of Publication:
United States
Language:
English