Zobrazeno 1 - 10
of 54
pro vyhledávání: '"Edwin H. Haskell"'
Autor:
Joseph A. Knight, A.B. Brik, E.G. Vajda, Scott C. Miller, Robert B. Hayes, Gerry H. Kenner, Edwin H. Haskell, Webster S. S. Jee, Gang Liu, J.K. Barrus
Publikováno v:
Radiation Measurements. 39:255-262
The purpose of this study was to gain insights into the variations seen in the electron paramagnetic resonance (EPR) spectroscopy of the native signals of teeth and bones used for retrospective dosimetry measurements. We determined that changes occur
Publikováno v:
Health Physics. 83:75-81
The problem of retrospectively measuring radiation doses to humans having both external and internal exposures is addressed. A simplified theoretical model is presented by which the internal exposure from a bone seeking radionuclide can be measured a
Autor:
Peter Jacob, Edwin H. Haskell, Ian Bailiff, N. G. Bougrov, R. Meckbach, L. Bøtter-Jensen, Marina O. Degteva, H.Y. Göksu, Jungner H
Publikováno v:
Health Physics. 82:94-101
Bricks collected from a contaminated village (Muslyumovo) of the lower Techa river valley, Southern Urals, Russia, were measured using thermoluminescence and optically stimulated luminescence by four European laboratories and a U.S. laboratory to est
Publikováno v:
Radiation Measurements. 32:799-803
The effect of caries in EPR dosimetry of tooth enamel (in the dose range of 0–1 Gy) was investigated. The enamel of each tooth was divided into carious, non-carious and intermediate portions. The EPR signals of enamel at g = 2.0018 (dosimetric) and
Autor:
Octavian G. Duliu, N. Nakamura, A. A. Bugai, V.G. Skvortsov, V.F. Stepanenko, Edwin H. Haskell, Sandro Onori, Paola Fattibene, V. Kirillov, E D Kleschenko, Sami Amira, A.B. Brik, Albrecht Wieser, Alexander Ivannikov, J. Nowak, S. Bercea, Alexander Romanyukha, E.A. Ignatiev, Shin Toyoda, Alexander I. Shames, B. Pass, M. Nather, Robert B. Hayes, D. Aragno, O. Scherbina, Kishor Mehta, S. Pivovarov, Freddy Callens, D.D. Tikounov, Bartlomiej Ciesielski, René Debuyst, S. Dubovsky, Vadim V. Chumak, Sergey Sholom
Publikováno v:
Radiation Measurements. 32:549-557
Eighteen international EPR laboratories participated in the second intercomparison programme. Each participant had to prepare enamel samples and evaluate the absorbed dose from molars that were irradiated in vitro in the range 0-1000 mGy. The objecti
Publikováno v:
Radiation Measurements. 32:559-566
We have implemented the method proposed by Aldrich and Pass (Aldrich, J.E., Pass, B., 1988. Determining radiation exposure from nuclear accidents and atomic tests using dental enamel. Health Phys. 54, 469–471.) to measure both the interior and exte
Autor:
Robert B. Hayes, Edwin H. Haskell
Publikováno v:
Radiation Measurements. 32:781-785
In this paper, a method for identifying interfering EPR signals in fossil tooth enamel is presented. This method consists of optimizing EPR parameters to enhance spectral resolution of the fossil signals followed by a g -factor and intensity normaliz
Publikováno v:
Applied Radiation and Isotopes. 52:1077-1083
Peculiarities of the internal construction of tooth enamel and bones that cause anisotropy effects and mass transfer in these objects are described. It is shown that the composition of the mineral component of teeth and bones depends on a mechanical-
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 441:535-550
We demonstrate a procedure in retrospective EPR dosimetry which allows for virtually nondestructive sample evaluation in terms of sample irradiations. For this procedure to work, it is shown that corrections must be made for cavity response character
Autor:
Edwin H. Haskell, J.K. Barrus, Byron L. Hardy, Alexander Romanyukha, Robert B. Hayes, Albrecht Wieser
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 440:453-461
Dose reconstruction in the course of a series of blind tests demonstrated that an accuracy of 10 mGy for low doses and 1% for high doses can be achieved using EPR spectroscopy. This was accomplished using a combination of methodologies including poly