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DEPARTMENT OF ENERGY 41 Steps for Determining Artifact Age • Estimate contextual dose rate − Terrestrial, from radionuclide concentrations − Cosmogenic • Estimate total delivered dose to artifact − ‘As-found’ TL signal − Dose Response • Divide dose by dose rate • Publish results, impress friends OAK RIDGE NATIONAL LABORATORY U. S. DEPARTMENT OF ENERGY 42 Use of Electron Paramagnetic Resonance Instead of TL • EPR measures the same promoted electrons that provide the TL signal • Method is non-destructive • EPR is a spectroscopic method – provides lots of information OAK RIDGE NATIONAL LABORATORY U.

S. DEPARTMENT OF ENERGY 30 Final Note on Neutron Dosimetry • We still use a separate dosimeter for rad workers with neutron exposure potential • An unexpected twist from being associated with the Oak Ridge DOE facilities: Jerry Hunt recalls that we had all the free world’s 6Li – Harshaw had to get it from us! − Used years ago by Y-12 − Stored at ORGDP − Distributed by ORNL Isotope Sales OAK RIDGE NATIONAL LABORATORY U. S. DEPARTMENT OF ENERGY 31 ACORN 2 Continuing collaboration with Marko Moscovitch to develop an energy-independent neutron dosimeter OAK RIDGE NATIONAL LABORATORY U.

S. 27 Performance Requirements for Pocket-sized Alarm Dosimeters and Alarm Ratemeters Writing Group Background Jim Bogard (Chairman) Steve Browne Bill Casson, Sr. Larry Donovan Joe Leon Charlene Raddatz Mark Simpson Bob Ulman Joe Zlotnicki National Laboratory Commercial Nuclear Power National Laboratory Military Dosimeter Manufacturer Regulatory Agency Commercial Nuclear Power Dosimeter Manufacturer Dosimeter Manufacturer OAK RIDGE NATIONAL LABORATORY U. S. 11-1993, except • No test in photon mixtures (Category VI) • Beta-Photon Mixtures (Category VII) delivered simultaneously • Neutron-Photon Mixture doesn’t require 137Cs (uses tramp photons from the neutron source) OAK RIDGE NATIONAL LABORATORY U.

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A Touch of Grey - 20-year Restrospective on Radiation Dosimetry [pres. slides]


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