Download or read book Development of a Prompt Gamma Neutron Activation Analysis Facility at the University of Missouri Research Reactor and Obsidian Identification written by Abdul-Salam Gubreal Hanna and published by . This book was released on 1980 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book TRIGA Experimental and Irradiation Facilities for Research and Development written by and published by . This book was released on 1966 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Selected List of Neutron and Gamma Irradiation Facilities in Operation Being Built Or Planned written by Argonne National Laboratory and published by . This book was released on 1957 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Breakthrough in Precision 0 3 Percent of Neutron Activation Analyses Applied to Provenience Studies of Obsidian written by and published by . This book was released on 2002 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: A gamma ray spectrometer at LBNL (the Luis W. Alvarez Iridium Coincidence Spectrometer), that was specifically designed for high sensitivity measurements of iridium abundances, has been significantly modified in order to provide precisions of measurement in neutron activation analysis of obsidian significantly better than previously obtained (about 1%). Repeated measurements on a single sample of obsidian from a deposit near Chivay, Arequipa, Peru, showed a precision (average coefficient of variation) of 0.19% for the 6 best-measured elements, the value anticipated from the known random errors of measurement. In measurement of samples made from 7 different obsidian nodules from two locations near Chivay, a group of 5 had a spread of 0.30% for the 6 elements measured with counting statistics of better than 0.3% (and 1.8% for the remaining 6 elements). The data suggest there are source inhomogeneity and/or sample preparation contamination errors totaling 0.24 " .05% for the 6 best measured elements. A sixth obsidian sample could be distinguished from the main group because it differed by +0.8% for most elements, and the last sample could be easily distinguished because several elements differed by more than 1%. The precision of measurements now being developed may provide a significantly more precise determination of the provenience of obsidian artifacts than has been heretofore possible. Also the techniques of measurement developed for obsidian will provide even better precisions with pottery, as many elements are more abundant in pottery than in obsidian.

Download or read book Obsidian Sources Characterized by Neutron activation Analysis written by Adon A. Gordus and published by . This book was released on 1968 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concentrations of elements such as manganese, scandium, lanthanum, rubidium, samarium, barium, and zirconium in obsidian samples from different flows show ranges of 1000 percent or more, whereas the variation in element content in obsidian samples from a single flow appear to be less than 40 percent. Neutron-activation analysis of these elements, as well as of sodium and iron, provides a means of identifying the geologic source of an archeological artifact of obsidian.

Download or read book Comprehensive Dissertation Index written by and published by . This book was released on 1984 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dissertation Abstracts International written by and published by . This book was released on 1981 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Design and Development of a High Resolution Thermal Neutron Radiography Facility written by Don McKay Alger and published by . This book was released on 1971 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book INIS Atomindex written by and published by . This book was released on 1982 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Design and Experimental Testing of a Prompt Gamma Ray Activation Analysis System written by Walton L. Jensen and published by . This book was released on 1968 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Gas Test Loop Facilities Alternatives Assessment Report Rev 1 written by William J. Skerjanc and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An important task in the Gas Test Loop (GTL) conceptual design was to determine the best facility to serve as host for this apparatus, which will allow fast-flux neutron testing in an existing nuclear facility. A survey was undertaken of domestic and foreign nuclear reactors and accelerator facilities to arrive at that determination. Two major research reactors in the U.S. were considered in detail, the Advanced Test Reactor (ATR) and the High Flux Isotope Reactor (HFIR), each with sufficient power to attain the required neutron fluxes. HFIR routinely operates near its design power limit of 100 MW. ATR has traditionally operated at less than half its design power limit of 250 MW. Both of these reactors should be available for at least the next 30 years. The other major U.S. research reactor, the Missouri University Research Reactor, does not have sufficient power to reach the required neutron flux nor do the smaller research reactors. Of the foreign reactors investigated, BOR-60 is perhaps the most attractive. Monju and BN 600 are power reactors for their respective electrical grids. Although the Joyo reactor is vigorously campaigning for customers, local laws regarding transport of radioactive material mean it would be very difficult to retrieve test articles from either Japanese reactor for post irradiation examination. PHENIX is scheduled to close in 2008 and is fully booked until then. FBTR is limited to domestic (Indian) users only. Data quality is often suspect in Russia. The only accelerator seriously considered was the Fuel and Material Test Station (FMTS) currently proposed for operation at Los Alamos National Laboratory. The neutron spectrum in FMTS is similar to that found in a fast reactor, but it has a pronounced high-energy tail that is atypical of fast fission reactor spectra. First irradiation in the FMTS is being contemplated for 2008. Detailed review of these facilities resulted in the recommendation that the ATR would be the best host for the GTL.

Download or read book Identification of the Sources of Hopewellian Obsidian in the Middle West written by James Bennett Griffin and published by . This book was released on 1969 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: One hundred and twenty years ago, the first obsidian implements were reported from Hopewellian mounds by Squier and Davis (1848). Since that time, a number of regions have been suggested as the source area: Alaska, the Pacific Coast, Yellowstone National Park, New Mexico, and central Mexico. Neutron activation analysis of the elemental composition of Hopewellian obsidian indicates two separate element groups. One of these, the 150 Group, has its source at Obsidian Cliff in Yellowstone. The second, the 90 Group, is also located in Yellowstone, but the exact flow has not yet been discovered.

Download or read book American Doctoral Dissertations written by and published by . This book was released on 1980 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Transactions of the American Nuclear Society written by and published by . This book was released on 1958 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Archaeometry of Pre Columbian Sites and Artifacts written by David A. Scott and published by Getty Publications. This book was released on 1994-10-27 with total page 437 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on the 28th International Archaeometry Symposium jointly sponsored by the University of California, Los Angeles, and the Getty Conservation Institute, this volume offers a rare opportunity to survey under a single cover a wide range of investigations concerning pre-Columbian materials. Twenty chapters detail research in five principal areas: anthropology and materials science; ceramics; stone and obsidian; metals; and archaeological sites and dating. Contributions include Heather Lechtman's investigation of “The Materials Science of Material Culture,” Ron L. Bishop on the compositional analysis of pre-Columbian pottery from the Maya region, Ellen Howe on the use of silver and lead from the Mantaro Valley in Peru, and J. Michael Elam and others on source identification and hydration dating of obsidian artifacts.

Download or read book Methods for Geochemical Analysis written by Philip A. Baedecker and published by . This book was released on 1987 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analytical methods used in the Geologic Division laboratories of the U.S. Geological Survey for the inorganic chemical analysis of rock and mineral samples.

Download or read book Nuclear Techniques for Cultural Heritage Research written by International Atomic Energy Agency and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Scientific studies of art and archaeology are a necessary complement to cultural heritage conservation, preservation and investigation. Nuclear techniques, such as neutron activation analysis, X ray fluorescence analysis and ion beam analysis, have a potential for non-destructive and reliable investigation of precious artefacts and materials, such as ceramics, stone, metal, and pigments from paintings. Such information can be helpful in repair of damaged objects, in identification of fraudulent artefacts and in the appropriate categorization of historic artefacts."--P. [4] of cover.