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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. DEPARTMENT OF ENERGY 36 Photomicrograph of Etched CR39 Shows Feature Dependence on Neutron Energy and Incidence OAK RIDGE NATIONAL LABORATORY U. S. DEPARTMENT OF ENERGY 37 Fluorescence Induced by 2-Photon ‘Pumping’ at Intersection of Crossed Laser Beams in AnthraceneDoped PMMA 50 microns 1064 nm 532nm OAK RIDGE NATIONAL LABORATORY U. S. DEPARTMENT OF ENERGY 38 ACORN 3 The Use of Natural TL Materials for Dating Archaeological Artifacts OAK RIDGE NATIONAL LABORATORY U. S. ) Dan Weinand University of Tennessee – Knoxville OAK RIDGE NATIONAL LABORATORY U.

DEPARTMENT OF ENERGY 35 The average temperature rise from a 1-rad whole-body gamma exposure is about 2×10-6°C (see Turner, Bogard, Hunt & Rhea, Problems & Solutions in Radiation Protection, p 256). This shows that the temperature increase along a charged particle track is enough to melt and expand PMMA plastic! 5-MeV 12C3+ OAK RIDGE NATIONAL LABORATORY U. S. DEPARTMENT OF ENERGY 36 Photomicrograph of Etched CR39 Shows Feature Dependence on Neutron Energy and Incidence OAK RIDGE NATIONAL LABORATORY U.

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