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Book The Calculation of Neutron Yields in Mixtures and Compounds from the Thick Target Alpha N Yields in the Separate Constituents

Download or read book The Calculation of Neutron Yields in Mixtures and Compounds from the Thick Target Alpha N Yields in the Separate Constituents written by D. West and published by . This book was released on 1979 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: A simple relation is derived between the thick target yield of neutrons produced following (alpha, n) reactions in compounds or homogeneous mixtures and the yields in the separate constituents. It is necessary to assume that the Bragg law of additivity of stopping powers holds for the compound and to make the approximation that the stopping powers of all materials vary with energy in the same way apart from constant factors. The range of validity of the second hypothesis is examined in some detail. It is shown to be far superior to the approximation of a stopping power independent of energy. (Author).

Book Technical Abstract Bulletin

Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 1048 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Energy Research Abstracts

Download or read book Energy Research Abstracts written by and published by . This book was released on 1988 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Nuclear Science Abstracts

Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1966 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Thick Target Fast Neutron Yields

Download or read book Thick Target Fast Neutron Yields written by Z. Y. Guo and published by . This book was released on 1987 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Calculated Proton induced Thick target Neutron and Radionuclide Yields for E sub P D 100 MeV

Download or read book Calculated Proton induced Thick target Neutron and Radionuclide Yields for E sub P D 100 MeV written by and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Earlier proton-induced thick-target yield calculations have been extended in proton energy range and to additional target elements, using the proton stopping cross section data of Anderson and Ziegler and cross sections modeled with the GNASH code. The targets now described include Be, C, O, Ne, Al, Si, Fe, Co, Ni, Cu, W, Pb and Bi. Thick-target yields are presented for these thirteen targets, with most extending to 100 MeV. 13 refs., 3 figs., 13 tabs.

Book Relative High Energy Neutron Yields from Targets Bombarded with Protons and Deuterons UCRL 440

Download or read book Relative High Energy Neutron Yields from Targets Bombarded with Protons and Deuterons UCRL 440 written by William J. Knox and published by . This book was released on 1950 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Relative neutron yields in the forward direction from various target elements bombarded with 350 Mev protons and 190 Mev deuterons have been measured. Bismuth fission chambers with a threshold of about 50 Mev were used to detect the high energy neutrons. The actual flux of protons or deuterons traversing each target was determined from the activities induced in graphite monitors attached to the target. When a deuteron beam is used, the neutron yields for light elements agree with the values predicted by the deuteron stripping theory. For the heavy elements the observed values are fitted best by adding a function proportional to Z-sq to the stripping theory values. This may be interpreted as evidence for the production of high energy neutrons by the electric field disintegration of the deuteron. The neutron yields from the proton beam vary approximately as (A - Z)(exp(2/3)) for target elements from C to U. This indicates that the heavy elements are not completely transparent to 350 Mev protons. Beryllium has an anomalous neutron yield 50% higher than that for C. Calculations and measurements on the problem of multiple traversals of beam particles through thin targets are presented.

Book INIS Atomindex

Download or read book INIS Atomindex written by and published by . This book was released on 1985 with total page 1394 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Shape of Neutron Yield from Li7 p n Be7 Reaction Near Threshold and Neutron Energy Distribution Near Threshold

Download or read book Shape of Neutron Yield from Li7 p n Be7 Reaction Near Threshold and Neutron Energy Distribution Near Threshold written by David Wayne Palmer and published by . This book was released on 1965 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Empirical Formulae for Calculating Neutron Yields

Download or read book Empirical Formulae for Calculating Neutron Yields written by Ali Ahmed and published by LAP Lambert Academic Publishing. This book was released on 2012-02 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, light elements from Li up to Si for (, n) reactions and from H to Al for (p, n) reactions, as well as -particle and proton energies up to 10 MeV are covered as far as the data of reaction cross sections are available. The cross sections altogether with the stopping powers calculated from the Zeigler formula have been used to measure the n-yields for each reaction and then the weighted averages (W.A.) have been calculated. The adopted n-yields are found to be in good agreement with the available data of previous studies. Empirical formulae are proposed for the evaluation of these W.A. n-yields of both (, n) and (p, n) reactions. These formulae are based on empirical fits to the adopted n-yields calculated in the bombarding energy range from threshold up to 10 MeV.

Book Calculated Alpha induced Thick target Neutron and Radionuclide Yields for E sub alpha le 50 MeV

Download or read book Calculated Alpha induced Thick target Neutron and Radionuclide Yields for E sub alpha le 50 MeV written by and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Thick-target yields for [alpha]s incident on elements 4 ≤ Z ≤ 15 and Z = 17 have been calculated using the [alpha] stopping data of Ziegler with radionuclide production cross sections calculated with the GNASH code. Comparisons are made of the calculated cross sections with sparse measured data. Radionuclide production yields are tabulated at 5, 10, 20, 30, 40 and 50 MeV. 9 refs., 3 figs., 13 tabs.