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Nuclear Science, IEEE Transactions on

Issue 3 • Date June 1985

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Displaying Results 1 - 9 of 9
  • Table of contents

    Publication Year: 1985 , Page(s): c1
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    Freely Available from IEEE
  • IEEE Transactions on Nuclear Science

    Publication Year: 1985 , Page(s): c2
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  • An Iterative Reconstruction from Truncated Projection Data

    Publication Year: 1985 , Page(s): 1217 - 1224
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2355 KB)  

    Various methods have been proposed for tomographic reconstruction from truncated projection data. In this paper, a reconstructive method is discussed which consists of iterations of filtered back-projection, reprojection and some nonlinear processings. First, the method is so constructed that it converges to a fixed point. Then, to examine its effectiveness, comparisons are made by computer experiments with two existing reconstructive methods for truncated projection data, that is, the method of extrapolation based on the smooth assumption followed by filtered back-projection, and modified additive ART. View full abstract»

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  • ASIT Gamma-Ray Camera : A New Camera Head Provided with an Array of Scintillation Intensifier Tubes

    Publication Year: 1985 , Page(s): 1225 - 1231
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3005 KB)  

    After a brief examination of the main physical and technological problems which determine the limits of performance of various kinds of scintillation cameras, a new gamma camera is suggested in this paper. The detection head is composed of an array of scintillation intensifier tubes (ASIT), the bialkali photocathodes of which are closely coupled to a large NaI (Tl) scintillator plate. The output phosphor (P 47) screens of the intensifiers emit blue light pulses collected by a conventional event localizer which includes an array of photomultiplier tubes and an electronic calculator. A description of the basic operation of an ASIT gamma camera indicates that the event coordinates result from a barycentric estimation of the spatial distribution of detected light photons emitted from the scintillation. A computer simulation made to estimate the performance parameters of ASIT cameras shows that high intrinsic spatial and spectral resolutions can be reached. For a particular camera head design, 2.3 mm and 11.3 KeV FWHM at 122 KeV are obtained. View full abstract»

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  • Nanosecond Fluorescence Spectroscopy

    Publication Year: 1985 , Page(s): 1232 - 1241
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3426 KB)  

    This article is a summary of a short course lecture given in conjunction with the 1984 Nuclear Science Symposium. Measuring systems for nanosecond fluorescence spectroscopy using single-photon counting techniques are presented. These involve systems based on relaxation-type spark gap light pulser and synchronously pumped mode-locked dye lasers. Furthermore, typical characteristics and optimization of operating conditions of the critical components responsible for the system time resolution are discussed. A short comparison of the most important deconvolution methods for numerical analysis of experimental data is given particularly with respect to the signal-to-noise ratio of the fluorescence signal. View full abstract»

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  • Timing Electronics and Fast Timing Methods with Scintillation Detectors

    Publication Year: 1985 , Page(s): 1242 - 1249
    Cited by:  Papers (16)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2961 KB)  

    Time spectroscopy involves the measurement of the time relationship between two events. This paper reviews time pick-off techniques, practival time-pickoff circuits, and timing with scintillation detectors. A detailed comparison is made between leading-edge timing and constant-fraction timing. Typical timing resolution results are given for 60Co. View full abstract»

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  • EMP Propagation in a Plasma-Filled Waveguide

    Publication Year: 1985 , Page(s): 1250 - 1256
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1163 KB)  

    We present the experimental results of propagating an EMP-type pulse through a plasma-filled waveguide. Maxwell's equations and the swarm equations are used to model this system. These equations are simultaneously solved using finite difference techniques. Although the theoretical model appears to predict the output electric field in the experimental system quite well at low plasma electron number densities, it fails as the number density becomes large. We speculate about the origin of this discrepancy. View full abstract»

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  • Information for authors

    Publication Year: 1985 , Page(s): 1256a
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  • Affiliate Plan of the IEEE Nuclear and Plasma Sciences Society

    Publication Year: 1985 , Page(s): 1256-b
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Aims & Scope

IEEE Transactions on Nuclear Science focuses on all aspects of the theory and applications of nuclear science and engineering, including instrumentation for the detection and measurement of ionizing radiation; particle accelerators and their controls; nuclear medicine and its application; effects of radiation on materials, components, and systems; reactor instrumentation and controls; and measurement of radiation in space.

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