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Development of Soft Ionization for Particulate Organic Detection with the Aerodyne Aerosol Mass Spectrometer

Description: During this DOE SBIR Phase II project, we have successfully developed several soft ionization techniques, i.e., ionization schemes which involve less fragmentation of the ions, for use with the Aerodyne time-of-flight aerosol mass spectrometer (ToF-AMS). Vacuum ultraviolet single photon ionization was demonstrated in the laboratory and deployed in field campaigns. Vacuum ultraviolet single photon ionization allows better identification of organic species in aerosol particles as shown in laborat… more
Date: June 19, 2008
Creator: Trimborn, A.; Williams, L. R.; Jayne, J. T. & Worsnop, D. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Probabilistic methodology for estimating radiation-induced cancer risk

Description: The RICRAC computer code was developed at Oak Ridge National Laboratory to provide a versatile and convenient methodology for radiation risk assessment. The code allows as input essentially any dose pattern commonly encountered in risk assessments for either acute or chronic exposures, and it includes consideration of the age structure of the exposed population. Results produced by the analysis include the probability of one or more radiation-induced cancer deaths in a specified population, exp… more
Date: January 1, 1981
Creator: Dunning, D. E. Jr.; Leggett, R. W. & Williams, L. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Analysis of gas-cooled fast reactor shield designs

Description: In its shielding program for the Gas-Cooled Fast Reactor (GCFR) as conceived by General Atomic, Oak Ridge National Laboratory has developed an advanced shielding analysis system that incorporates the latest analysis techniques for converging to a shield design compatible with other design parameters such as cooling and structural requirements or material compatibility. Basically the system consists in applying the various techniques in a logical sequence to a given design, thereby generating a … more
Date: January 1, 1978
Creator: Bartine, D. E. & Williams, L. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Application of an advanced shielding analysis system to gas-cooled fast reactor designs

Description: In its shielding program for General Atomic's Gas-Cooled Fast Reactor (GCFR), Oak Ridge National Laboratory has developed an advanced shielding analysis system that incorporates the latest analysis techniques for converging to a shield design compatible with other design parameters. Basically the system consists in applying the various techniques in a logical sequence to a given design, thereby generating a large body of data to serve as an information base for subsequent redesigns by General A… more
Date: January 1, 1977
Creator: Bartine, D. E. & Williams, L. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Data testing of the 126/36 neutron-gamma ENDF/B-IV coupled library for LMFBR core and shield anaysis

Description: A description is given of the library testing program and results obtained to date in efforts to establish the library performance for a variety of important LMFBR core and shield applications. Calculational experience to date is summarized, including CSEWG Phase II data testing, comparisons of processed cross sections to measurements of gamma-ray production cross sections, RDD processing methods testing, and comparison of calculations to measurements of dose through thick steel/sodium/steel sh… more
Date: January 1, 1976
Creator: White, J. E.; Wright, R. Q.; Williams, L. R. & Weisbin, C. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Measurements of Black Carbon Particles Chemical, Physical, and Optical Properties

Description: Accurate measurements of the chemical, physical, and optical properties of aerosol particles containing black carbon are necessary to improve current estimates of the radiative forcing in the atmosphere. A collaborative research effort between Aerodyne Research, Inc. and Boston College has focused on conducting field and laboratory experiments on carbonaceous particles and the development and characterization of new particulate instrumentation. This presentation will focus on the chemical, phys… more
Date: December 14, 2009
Creator: Onasch, T.B.; Sedlacek, A.; Cross, E. S.; Davidovits, P.; Worsnop, D. R.; Ahern, A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Three-dimensional calculations of neutron streaming in the beam tubes of the ORNL HFIR (High Flux Isotope Reactor) Reactor

Description: The streaming of neutrons through the beam tubes in High Flux Isotope Reactor at Oak Ridge National Laboratory has resulted in a reduction of the fracture toughness of the reactor vessel. As a result, an evaluation of vessel integrity was undertaken in order to determine if the reactor can be operated again. As a part of this evaluation, three-dimensional neutron transport calculations were performed to obtain fluxes at points of interest in the wall of the vessel. By comparing the calculated a… more
Date: January 1, 1988
Creator: Childs, R. L.; Rhoades, W. A. & Williams, L. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Reference values for total blood volume and cardiac output in humans

Description: Much research has been devoted to measurement of total blood volume (TBV) and cardiac output (CO) in humans but not enough effort has been devoted to collection and reduction of results for the purpose of deriving typical or {open_quotes}reference{close_quotes} values. Identification of normal values for TBV and CO is needed not only for clinical evaluations but also for the development of biokinetic models for ultra-short-lived radionuclides used in nuclear medicine (Leggett and Williams 1989)… more
Date: September 1, 1994
Creator: Williams, L. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Blood Circulation Model for Reference Man

Description: A dynamic blood circulation model that predicts the movement and gradual dispersion of a bolus of material in the circulation after its intravenous injection into an adult human. The main purpose of the model is improve the dosimetry of internally deposited radionuclides that decay in the circulation to a significant extent. The model partitions the blood volume into 24 separate organs or tissues, right heart chamber, left heart chamber, pulmonary circulation, arterial outflow to the aorta and … more
Date: December 1996
Creator: Leggett, R. W.; Eckerman, K. F. & Williams, L. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

BNCT filter design studies for the ORNL Tower Shielding Facility

Description: Boron Neutron Capture Therapy (BNCT) in the United States has entered into a new phase with the initiation of clinical trials using neutron sources at the Brookhaven National Laboratory and the Massachusetts Institute of Technology. If these trials are successful at demonstrating the efficacy of BNCT as a viable treatment for glioblastoma multiforme, then there will be an immediate demand for several additional neutron sources in order to treat the several thousand patients currently diagnosed … more
Date: December 31, 1996
Creator: Ingersoll, D. T.; Slater, C. O. & Williams, L. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Comparisons of TORT and MCNP dose calculations for BNCT treatment planning

Description: The relative merit of using a deterministic code to calculate dose distributions for BNCT applications were examined. The TORT discrete deterministic ordinated code was used in comparison to MCNP4A to calculate dose distributions for BNCT applications
Date: December 31, 1996
Creator: Ingersol, D. T.; Slater, C. O.; Williams, L. R.; Redmond, E. L., II & Zamenhof, R. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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