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Neutron generators

SOURCE OF COLLIMATED THERMAL NEUTRON BEAM BASED ON A NEUTRON GENERATOR FOR NONDESTRUCTIVE EVALUATION OF MATERIALS AND PRODUCTS... [Pg.435]

This paper presents calculation and experimental studies of a moderator with a thermal neutron extraction channel, based on an NG-400 pumped neutron generator produced by the All-Russia Automation Research Institute. The neutron generator provides a maximum 14-MeV neutron flux density of 5T0 n/cm -s on the outer surface of the target chamber. [Pg.435]

All the techniques discussed here involve the atomic nucleus. Three use neutrons, generated either in nuclear reactors or very high energy proton ajccelerators (spallation sources), as the probe beam. They are Neutron Diffraction, Neutron Reflectivity, NR, and Neutron Activation Analysis, NAA. The fourth. Nuclear Reaction Analysis, NRA, uses charged particles from an ion accelerator to produce nuclear reactions. The nature and energy of the resulting products identify the atoms present. Since NRA is performed in RBS apparatus, it could have been included in Chapter 9. We include it here instead because nuclear reactions are involved. [Pg.645]

For fast neutron activations, the samples were irradiated with a Kaman nuclear neutron generator (Model A711) under conditions similar to those described In this article under the section... [Pg.364]

A sealed-tube neutron generator, utilizing the deuterium-tritium reaction is the source of fast (14 MeV) neutrons, and a 8 x 3 1 Nal scintillation detector, with three optically coupled photomultipliers, is used to measure the >ray signal... [Pg.381]

The most abundant isotope is which constitutes almost 99% of the carbon in nature. About 1% of the carbon atoms are There are, however, small but significant differences in the relative abundance of the carbon isotopes in different carbon reservoirs. The differences in isotopic composition have proven to be an important tool when estimating exchange rates between the reservoirs. Isotopic variations are caused by fractionation processes (discussed below) and, for C, radioactive decay. Formation of takes place only in the upper atmosphere where neutrons generated by cosmic radiation react with nitrogen ... [Pg.284]

Activation Analysis with Neutron Generators. By Sam S. Nar-golwalla and Edwin P. Przybylowicz... [Pg.444]

SC-25 Radiation Protection in the Use of Small Neutron Generators SC-26 High Energy X-Ray Dosimetry SC-32 Administered Radioactivity SC-33 Dose Calculations... [Pg.103]

The incorporation of associated alpha particle detection in a sealed tube neutron generator (STNG) appears to severely aggravate the concerns over the limited neutron flux and tube lifetime previously detailed for STNG FNA approaches. A mean time to failure of some APSTNGs at a neutron flux of lO n/s is about 200 h [24]. Work is continuing to improve this mean time to failure. [Pg.76]

J. Csikai, CRC Handbook of Fast Neutron Generators, Vol. 1, CRC Press Inc., Boca Raton, 1987. [Pg.85]

P. Bach, M. Jatteau, J. L. Ma, C. Latnbertnont, Industrial Analysis Possibilities Using Long-Life Sealed-Tube Neutron Generators, Journal of Radioanalytical and Nuclear Chemistry, 168 (1993) 393. [Pg.86]

Even so, demand for them is increasing year by year and in some cases quite spectactularly. As an example, both thulium and erbium are used as target materials in some sealed-tube neutron generators and erbium is also used in other generators designed specifically for use in cancer therapy. [Pg.174]

High energy neutron generators are particularly useful in well logging applications. In such applications one important factor is accurate knowledge of the neutron pulses that irradiate the surrounding formation. For example, it is desirable to accurately measure the neutron output, e.g., the number of neutrons emitted by the neutron detector. [Pg.130]


See other pages where Neutron generators is mentioned: [Pg.507]    [Pg.508]    [Pg.509]    [Pg.751]    [Pg.13]    [Pg.356]    [Pg.357]    [Pg.357]    [Pg.357]    [Pg.357]    [Pg.357]    [Pg.360]    [Pg.362]    [Pg.362]    [Pg.380]    [Pg.380]    [Pg.381]    [Pg.383]    [Pg.388]    [Pg.1563]    [Pg.634]    [Pg.212]    [Pg.121]    [Pg.74]    [Pg.75]    [Pg.708]    [Pg.836]    [Pg.390]    [Pg.114]    [Pg.52]    [Pg.173]    [Pg.449]    [Pg.389]   
See also in sourсe #XX -- [ Pg.138 , Pg.139 , Pg.144 , Pg.149 ]

See also in sourсe #XX -- [ Pg.148 ]




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