David K. Miko
Los Alamos National Laboratory
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Featured researches published by David K. Miko.
IEEE Transactions on Nuclear Science | 1998
Robert J. Estep; Mohini W. Rawool-Sullivan; David K. Miko
In this paper we present the gross-count material basis set (GC-MBS) method for estimating transmission losses in measurements of radionuclides using low-resolution gamma-ray detectors such as NaI or CdZnTe. The application to continuum-subtracted peaks measured with high-purity Ge detectors is also discussed. To illustrate the method, we apply it to the correction of spectra from enriched uranium that have been distorted by various intervening absorbers. We also examine the application to simultaneous determination of the uranium enrichment through an unknown absorber using an NaI detector.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1999
David K. Miko; Robert J. Estep; Mohini W. Rawool-Sullivan
Abstract A method is described for the extraction of isotopic information from attenuated gamma-ray spectra using the gross-count material basis set (GC-MBS) model. This method solves for the isotopic composition of an unknown mixture of isotopes attenuated through an absorber of unknown material. For binary isotopic combinations the problem is nonlinear in only one variable and is easily solved using standard line optimization techniques. Results are presented for NaI spectrum analyses of various binary combinations of enriched uranium, depleted uranium, low burnup Pu, 137 Cs, and 133 Ba attenuated through a suite of absorbers ranging in Z from polyethylene through lead. The GC-MBS method results are compared to those computed using ordinary response function fitting and with a simple net peak area method. The GC-MBS method was found to be significantly more accurate than the other methods over the range of absorbers and isotopic blends studied.
ieee nuclear science symposium | 1997
Mohini W. Rawool-Sullivan; Robert J. Estep; David K. Miko
It was recently shown that a logarithmic response-function technique based on the material basis set (MBS) formalism used in the tomographic gamma scanner (TGS) method allows gross spectra from NaI detectors to be used in both measuring MBS transmission corrections using external transmission sources and in applying the corrections to emission spectra to arrive at radionuclide mass estimates. In this work we have attempted to show that addition of the oblique scatter component can increase the accuracy of the GC-TGS measurements with both NaI and high-purity germanium detectors. This paper describes the formalism behind the GC-TGS method and the improvement achieved in the analysis by including the scatter component.
Archive | 2011
Ernst I. Esch; Robert J. Estep; Robert J Dallman; Noah G Pope; Jon B Nielsen; Mark E Abhold; David J. Desimone; Katherine C. Frame; David K. Miko; John Alan Rennie; Eric B Sorensen; Sy Stange; Michael W Strevell
Archive | 2015
David K. Miko; David J. Desimone
Archive | 2013
Ernst I. Esch; Jon S. Bridgewater; Kiwhan Chung; Stephen Croft; David J. Desimone; Rollin E. Lakis; David K. Miko; Carlos D. Rael; Laura A. Osburn
Archive | 2012
Katherine C. Frame; Mark M. Bourne; William J. Crooks; Louise G Evans; Douglas R. Mayo; Cipriano D. Gomez; David K. Miko; William R. Salazar; Sy Stange; Georgiana M. Vigil
Archive | 2012
Katherine C. Frame; Mark M. Bourne; William J. Crooks; Louise G Evans; Cipriano D. Gomez; Douglas R. Mayo; David K. Miko; William R. Salazar; Sy Stange; Georgiana M. Vigil
Archive | 2012
Katherine C. Frame; Mark M. Bourne; William J. Crooks; Louise G Evans; Douglas R. Mayo; David K. Miko; William R. Salazar; Sy Stange; Jose I. Valdez; Georgiana M. Vigil
Archive | 2012
Ernst I. Esch; Jeffrey D. Goettee; David J. Desimone; Rollin E. Lakis; David K. Miko