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Smith, R.W.
Surrey Univ., Guildford (United Kingdom)2001
Surrey Univ., Guildford (United Kingdom)2001
AbstractAbstract
[en] Ion beam analysis techniques have been developed to allow profiling of small molecules diffused into materials at depths ranging from 10-7 to 10-1 m. A model DPS/PS/DPS triple-layer film and D(3He,p)4He nuclear reaction analysis was used to test the applicability of a novel data processing program - the IBA DataFurnace - to nuclear reaction data. The same reaction and program were used to depth profile the diffusion of heavy water into cellophane. A scanning 3He micro-beam technique was developed to profile the diffusion of small molecules into both planar and cylindrical materials. The materials were exposed to liquids containing deuterium labelled molecules. A cross-section was exposed by cutting the material perpendicular to the surface and this was bombarded by a scanning 3He micro-beam. Nuclear reaction analysis was used to profile the diffusing molecules, particle induced X-ray emission (in most cases) to locate the matrix and Rutherford backscattering for normalisation. Two-dimensional maps showing the molecular distribution over the cross-section were obtained. From these one-dimensional concentration profiles were produced. Water diffusion was studied into a planar and a cylindrical polymer, three different planar fibre optic grade glasses and both a fibre optic pressure sensor and communication fibre. The diffusion of dye into hair was also investigated. These studies have provided information about the diffusion mechanisms that take place, and where relevant diffusion coefficients have been obtained using either a semi-infinite medium Fickian planar diffusion model or a cylindrical Fickian diffusion model. (author)
Secondary Subject
Source
Dec 2001; [vp.]; Available from British Library Document Supply Centre- DSC:DXN048990; Country of input: International Atomic Energy Agency (IAEA); Thesis (Ph.D.)
Record Type
Miscellaneous
Literature Type
Thesis/Dissertation
Country of publication
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Smith, R.W.
California Univ., Berkeley (USA). Lawrence Berkeley Lab1980
California Univ., Berkeley (USA). Lawrence Berkeley Lab1980
AbstractAbstract
[en] Several new aspects of nonlinear or wave mixing spectroscopy were investigated utilizing the polarization properties of the nonlinear output field and the dependence of this field upon the occurrence of multiple resonances in the nonlinear susceptibility. First, it is shown theoretically that polarization-sensitive detection may be used to either eliminate or controllably reduce the nonresonant background in coherent anti-Stokes Raman spectroscopy, allowing weaker Raman resonances to be studied. The features of multi-resonant four-wave mixing are examined in the case of an inhomogeneously broadened medium. It is found that the linewidth of the nonlinear output narrows considerably (approaching the homogeneous width) when the quantum mechanical expressions for the doubly- and triply-resonant susceptibilities are averaged over a Doppler or strain broadened profile. Experimental studies of nonlinear processes in Pr+3:LaF3 verify this linewidth narrowing, but indicate that this strain broadened system cannot be treated with a single broadening parameter as in the case of Doppler broadening in a gas. Several susceptibilities are measured from which are deduced dipole matrix elements and Raman polarizabilities related to the 3H4, 3H6, and 3P0 levels of the praseodymium ions
Primary Subject
Source
Aug 1980; 184 p; Available from NTIS., PC A09/MF A01
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Report
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AbstractAbstract
No abstract available
Record Type
Journal Article
Journal
Proc. IEEE (Inst. Electr. Electron. Eng.); v. 59(4); p. 712-713
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Smith, R.W.
Proceedings of the eighth annual DOE low-level waste management forum: Technical Session 4, State/regional progress1987
Proceedings of the eighth annual DOE low-level waste management forum: Technical Session 4, State/regional progress1987
AbstractAbstract
[en] After more than three years of analysis and deliberation, the Special Legislative Commission on Low-Level Radioactive Waste has developed and filed with the Legislature the Massachusetts Low-Level Radioactive Waste Management Act. The act includes a multi-tiered process for the environmental screening of the entire state to site a low-level waste facility in Massachusetts, should it be determined that such a facility is necessary. Legislators, representatives of environmental and public interest organizations, state agencies, and the industrial, academic, medical, and nuclear power producing generators of low-level radioactive waste have worked with each other and the public to develop consensus legislation that ensures protection of public health while meeting Massachusetts' federally mandated responsibility. The process used to arrive at a consensus document and the critical policy initiatives developed are discussed
Primary Subject
Secondary Subject
Source
EG and G Idaho, Inc., Idaho Falls (USA); p. 57-67; Feb 1987; p. 57-67; 8. annual participants' information meeting of the DOE Low-Level Waste Management Program; Denver, CO (USA); 22-26 Sep 1986; Available from NTIS, PC A06/MF A01; 1 as DE87012445
Record Type
Report
Literature Type
Conference
Report Number
Country of publication
Reference NumberReference Number
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INIS IssueINIS Issue
Ord, R.N.; Smith, R.W.
Hanford Engineering Development Lab., Richland, Wash. (USA)1972
Hanford Engineering Development Lab., Richland, Wash. (USA)1972
AbstractAbstract
No abstract available
Primary Subject
Source
15 Apr 1972; 14 p; 10. annual American Nuclear Society conference; Las Vegas, Nevada, USA; 18 Jun 1972; CONF-720607--31
Record Type
Report
Literature Type
Conference
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Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
No abstract available
Primary Subject
Source
18. annual American Nuclear Society conference; Las Vegas, Nev; 18 Jun 1972; Published in summary form only.
Record Type
Journal Article
Literature Type
Conference
Journal
Trans. Amer. Nucl. Soc; v. 15(1); p. 426
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Smith, R.W.; Adamson, G.E.
Energy Research and Development Administration, Washington, D.C. (USA)1975
Energy Research and Development Administration, Washington, D.C. (USA)1975
AbstractAbstract
[en] The transducer is suited for application at high temperatures in the presence of active corrosive sodium. Its basic element is a piezoelectric active element enclosed in a casing of sodium-compatible material such as stainless steel. The lead circonate or lead titanate ceramics crystal together with the rear side of the transducer front plate is connected coaxially to an ultrasonic transducer lens. The transducer lens is a concave cutout segment in the bottom side of the transducer front plate. A spring-loaded contact piece provides the electrical connection of the back electrode of the crystal. A supporting element between the rear side of the crystal and the contact piece serves to maintain the electrical voltage between them. The supporting element consists of a loosely interweaved wire ball with multiple points of contact between the contact piece and the crystal, but it may also be an attenuator pad of high-temperature silicon rubber with a heavy addition of tungsten powder. The crystal is connected to the transducer front plate with a lead alloy bob (1.5% Ag; 5% Sn; 93.5% Pb) which is resistant to the temperatures and radiation values of fast breeder reactors. Before installation, the crystal is covered with a copper electrode of a thickness of 2 microns on the side facing the transducer front plate and with a platinum electrode of a thickness of 2 microns on the opposite side. The lead alloy will then cover the copper electrode and not expose the platinum electrode to corrosion. (ORU/AK)
[de]
Der Wandler ist fuer Hochtemperaturanwendungsfaelle in einer reaktiven korrodierenden Natriumumgebung geeignet. Als Grundelement weist er ein piezoelektrisches aktives Element auf, das von einem Gehaeuse umschlossen ist. Das Gehaeuse besteht aus einem Material, das mit dem Natrium kompatibel ist, wie rostfreier Stahl. Der Kristall aus Bleizirkonat oder Bleititanatkeramik ist mit der Rueckseite der Wandlerstirnplatte koaxial mit einer Wandlerlinse fuer den Ultraschall verbunden. Die Wandlerlinse ist als konkaver Ausschnittsteil in der Unterseite der Wandlerstirnplatte ausgebildet. Ein unter Federdruck stehendes Kontaktstueck stellt die elektrische Verbindung der hinteren Elektrode des Kristalls her. Zwischen der Hinterseite des Kristalls und dem Kontaktstueck ist ein Stuetzglied angeordnet, um die elektrische Kontinuitaet zwischen beiden aufrechtzuerhalten. Das Stuetzglied wird von einer locker verwebten, elastischen Drahtkugel gebildet, die eine Vielzahl diskreter Beruehrungspunkte zwischen Kontaktstueck und Kristall aufweist. Das Stuetzglied kann aber auch ein Daempfungsglied sein, das aus Hochtemperatur-Silikongummi, stark versetzt mit Wolframpulver, besteht. Die Befestigung des Kristalls an der Wandlerstirnseite erfolgt mit einem Bleilegierungslot (1,5% Ag; 5% Sn; 93,5% Pb), das auch Temperaturen und Strahlungspegeln standhaelt, die bei schnellen Brueterreaktoren auftreten. Zuvor erhaelt der Kristall auf der der Wandlerstirnseite zugewandten Seite eine 2 Mikron dicke Kupferelektrode und auf die entgegengesetzte Kristallseite eine 2 Mikron starke Platinelektrode aufgesprueht. Die Bleilotlegierung kann die Kupferelektrode benetzen and setzt die Platinelektrode keiner Oxidation aus. (ORU)Original Title
Akustischer Wandler und Verfahren zu seiner Herstellung
Primary Subject
Secondary Subject
Source
20 Feb 1975; 15 p; DE PATENT DOCUMENT 2436328/A/; 4 figs.
Record Type
Patent
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Day, C.K.; Smith, R.W.
Hanford Engineering Development Lab., Richland, Wash. (USA)1973
Hanford Engineering Development Lab., Richland, Wash. (USA)1973
AbstractAbstract
No abstract available
Original Title
ISO-SCAN
Primary Subject
Source
Oct 1973; 21 p; IEEE ultrasonics symposium; Monterey, California, USA; 5 Nov 1973; CONF-731128--1
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Report
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Conference
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AbstractAbstract
[en] This report describes a new all-sky imaging Fabry-Perot spectrometer used for ground based mapping of upper atmospheric wind and temperature fields in the auroral zone
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Journal Article
Journal
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Sayre, E.V.; Smith, R.W.
Brookhaven National Lab., Upton, N.Y. (USA)1973
Brookhaven National Lab., Upton, N.Y. (USA)1973
AbstractAbstract
No abstract available
Primary Subject
Source
1973; 36 p; 2. Cairo solid state conference; Cairo, United Arab Republic; 21 Apr 1973; CONF-730416--4
Record Type
Report
Literature Type
Conference
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Country of publication
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