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The use of a beta-ray spectrometer, in the analysis of nuclear decay schemes, makes possible the solution of many of the problems which arise in the course of such analyses. Of particular interest is the application of the instrument to the determination of the energy of beta and gamma-radiation from radioactive isotopes. In addition, it is possible to use the instrument to estimate the relative intensities of the various components of radiation; and to apply the coincidence method, in conjunction with the spectrometer, to the determination of the order in which these components are emitted from the nucleus. The present work was concerned with three particular problems arising in beta-ray spectrometry. A method of improving the intensity-resolution relationship of a thin lens magnetic beta-ray spectrometer, by means of ring focusing, was investigated. The existence of a ring-shaped constriction in the electron beam was demonstrated experimentally by a photographic film method. A theoretical analysis was carried out in an attempt to determine relations from which the relative intensities of beta-rays, gamma-rays and internal conversion electrons might be determined from data obtained with the spectrometer. Simplifying assumptions were made concerning the focusing action of the instrument, and effects due to scattering of electrons in the source of photoelectric radiator were neglected. Formulae were derived from which the observed spectrometer counting rates due to sources of known activity, emitting beta-rays, gamma-rays or internal conversion electrons may be predicted.
Nuclear structure and decay data for more than 3,500 isotopes and isomers—over 400 new additions. Also in this 1998 Update: How to use the Table of Isotopes CD-ROM Isotope Explorer user's manual How to use the Internet Table of Isotopes Principal gamma rays from isotopes with half-lives > 1.0h Alpha-particle energies. This book's fully updated companion CD-ROM includes: Radioactive decay and nuclear structure information for more than 3,500 isotopes and isomers —over 400 new additions Additional appendices for: Experimental and theoretical atomic mass data Theoretical chart of the nuclides New edition of the Table of Superdeformed Nuclear Bands and Fission Isomers Synthesis of data for more than 150,000 references —the most complete source of information available. Features of the CD-ROM: Isotope Explorer software searches evaluated nuclear structure data file (ENSDF) database. This software can select and display ENSDF data as: Decay scheme and nuclear structure drawings Tables with hypertext-linked comments and footnotes Plots of related information Nuclear charts color-coded by selected properties Reference keyword abstracts. Additional information on CD-ROM includes: Thermal neutron cross sections Nuclear astrophysics reaction rates Spontaneous fission yields Table of radioactive isotopes databases. System requirements: For PC, Macintosh?, or UNIX? systems with double speed or faster CD-ROM drive and sufficient RAM memory to run AdobeTM Acrobat? (see Adobe Acrobat Reader Information in book for specific system requirements). Acrobat Reader? version 3.01 included for Windows?, DOS, Macintosh, and UNIX. Internet browser compatible with HTML 2 or higher required for viewing HTML documents. Isotope Explorer requires a Windows? 95 or NT operating system.
The Symposium on Nuclear Data Evaluation Methodology provided a forum for the discussion of developments made over the past 12 years in the evaluation methods used for generating data files for applied technology. With a program that was prepared by an international committee of experts in this field, this set of proceedings gives a comprehensive overview of the development and progress of this field for the last 12 years. It serves as an important source of reference and historical update for those seeking an in-depth understanding of this study.
"Radiation detection is key to experimental nuclear physics as well as underpinning a wide range of applications in nuclear decommissioning, homeland security and medical imaging. This book presents the state-of-the-art in radiation detection of light and heavy ions, beta particles, gamma rays and neutrons. The underpinning physics of different detector technologies is presented, and their performance is compared and contrasted. Detector technology likely to be encountered in contemporary international laboratories is also emphasized. There is a strong focus on experimental design and mapping detector technology to the needs of a particular measurement problem. This book will be invaluable to PhD students in experimental nuclear physics and nuclear technology, as well as undergraduate students encountering projects based on radiation detection for the first time. Part of IOP Series in Nuclear Spectroscopy and Nuclear Structure." -- Prové de l'editor.