The Determination of Nuclear Decay Schemes by Absorption and Coincidence Measurements PDF Download
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Author: John Patrick Lonergan
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: John Patrick Lonergan
Publisher:
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Category :
Languages : en
Pages :
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Author: John Peter Unik
Publisher:
ISBN:
Category : Radioactive decay
Languages : en
Pages : 110
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Author: James Arthur Cooley
Publisher:
ISBN:
Category :
Languages : en
Pages : 168
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Author:
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Category :
Languages : en
Pages :
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The decay schemes of the isomers of Tc/sup 95/ and Tc/sup 97/ were studied by using high-resolution conversionelectron spectrographs, gamma-ray scintillation detectors, and coincidence techniques. The half life of the 74.6- kev excited state in Np/sup 239/ was measured by the delayed coincidence technique as 1.2 plus or minus 0.1 m mu scc. The directional correlations of two gamma-ray cascades following the beta decay of U/sup 237/ to Np/sup 237/ were studied and the results were found to be consistent with previous assignments of the total angular momenta of the excited states. An upper limit on the half life of the 332-kev excited state in Np/sup 237/ was determined to be 1.0 M mu sec. Electron-electron coincidence measurements were performed on the beta decay of Pa/ sup 233/. The transmission of one-half of the original electron-electron coincidence spectrometer was increased by a factor of six without sacrificing resolution. This increased transmission was achieved by converting the original thin-lens magnetic field to a thick-lens triangular magnetic field. (auth).
Author: W. C. Peacock
Publisher:
ISBN:
Category : Radioactive decay
Languages : en
Pages : 12
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Author: Charles Anton Prohaska
Publisher:
ISBN:
Category : Isotopes
Languages : en
Pages : 74
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An apparatus for measuring alpha-gamma and alpha-electron coincidences has been put in operation. This apparatus is described. From data obtained with this apparatus, decay schemes are postulated for Am241, Cm242, Th230, Pa231, U233. Coincidence data on Pu239, U234, and Po208,209,210 are also presented.
Author: Samuel Bradley Burson
Publisher:
ISBN:
Category : Hafnium
Languages : en
Pages : 12
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 11
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The inherent characteristics required of a coincidence circuit for nuclear research, as pointed out by Norling are: (1) high resolving power, (2) ability of the circuit to function properly at high single counting rates, (3) low sensitivity to external electrical disturbances, and (4) the circuit shall register a constant percentage, or preferably all of the coincidences. It has been found here that each of the listed characteristics is more or less dependent upon the others so that optimum operating conditions must be determined. An outline of the uses of a coincidence circuit and an outline of the present basic design principles are in order here. The coincidence circuit has been found valuable in the examination of the decay schemes of natural and artificial radioactivities, i.e. the evaluation of internal conversion coefficients or the determination of gamma/beta ratios. It has been used to measure gamma ray energies by Compton recoil absorption. Some work has been done also in the measurement of very short half-lives. The detection of certain radioactive isotopes in the presence of large radioactive contaminations is made possible through the use of the coincidence circuit.
Author: G. D. O'Kelley
Publisher: National Academies
ISBN:
Category : Nuclear counters
Languages : en
Pages : 148
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Author: Gerhart Friedlander
Publisher: John Wiley & Sons
ISBN: 9780471862550
Category : Technology & Engineering
Languages : en
Pages : 708
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Introduction to Radiation Chemistry Third Edition J. W. T. Spinks and R. J. Woods The only single source guide to radiation chemistry has now been expanded to include new material on applied radiation chemistry and experimental methods, as well as gaseous and solid systems. Other enhancements include broadened coverage of chemical reactions initiated by high-energy and their commercial applications, as well as new topics related to kinetics and experimental procedures. The Third Edition features numerical data in Sl units, simplifying most radiation-chemical calculations, an expanded problem section, and key references updated to reflect recent research. 1990 (0 471-61403-3) 574 pp. The Elements Beyond Uranium Glenn T. Seaborg and Walter D. Loveland Written by the team of Nobel Laureate Glenn Seaborg--an active participant in the discovery of transuranium elements--and leading chemist, Walter Loveland, here is a unique inside account of the discovery of these elements as well as the first definitive look at their chemical, physical, and nuclear properties. The book contains detailed discussions of nuclear synthesis reactions, experimental techniques, natural occurrence, superheavy elements, practical applications, and predictions for the future, as well as such special features as excerpts from original notebooks, pictures of element discovery teams, and up-to-date tables of nuclear properties. 1990 (0 471-89062-6) 359 pp.
