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DE200515013508

Publication Date	2000
Personal Author	Younes, W.; Becker, J. A.; Bernstein, L. A.; Garrett, P. E.; McGrath, C. A.
Page Count	309
Abstract	Measurements of partial 235U(n,2n gamma) gamma-ray cross sections have been carried out as a function of incident neutron energy using the GEANIE spectrometer at LANSCE/WNR+ The yields of gamma rays resulting from the population of discrete levels in the residual nucleus 234U have been measured at incident neutron energies in the 1-20-MeV range. These data provide, with the aid of nuclear reaction modeling, a measurement of the 235U(n,2n) reaction cross section and serve as a proof of principle of the gamma-ray technique for the parallel 23gPu(n,2n) measurement. This paper presents the analysis of the y-ray data and the extraction of partial gamma-ray cross sections as a function of incident neutron energy, Uncertainties associated with the spectroscopic analysis of the data and validation of the results are discussed in detail.
Keywords	Cross sections Gamma rays Uranium 235 Spectroscopic analysis
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Lawrence Livermore National Lab., CA.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200601

235U(n,2n(gamma)) Yrast Partial Gamma-Ray Cross Sections: A Report on the 1998 -- 1999 GEANIE Data and Analysis Techniques.

235U(n,2n(gamma)) Yrast Partial Gamma-Ray Cross Sections: A Report on the 1998 -- 1999 GEANIE Data and Analysis Techniques.
DE200515013508

Publication Date	2000
Personal Author	Younes, W.; Becker, J. A.; Bernstein, L. A.; Garrett, P. E.; McGrath, C. A.
Page Count	309
Abstract	Measurements of partial 235U(n,2n gamma) gamma-ray cross sections have been carried out as a function of incident neutron energy using the GEANIE spectrometer at LANSCE/WNR+ The yields of gamma rays resulting from the population of discrete levels in the residual nucleus 234U have been measured at incident neutron energies in the 1-20-MeV range. These data provide, with the aid of nuclear reaction modeling, a measurement of the 235U(n,2n) reaction cross section and serve as a proof of principle of the gamma-ray technique for the parallel 23gPu(n,2n) measurement. This paper presents the analysis of the y-ray data and the extraction of partial gamma-ray cross sections as a function of incident neutron energy, Uncertainties associated with the spectroscopic analysis of the data and validation of the results are discussed in detail.
Keywords	Cross sections Gamma rays Uranium 235 Spectroscopic analysis
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Lawrence Livermore National Lab., CA.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200601