› › Absolute U238 Photofission Cross Section Measurements Using Thermal Neutron Capture Gamma Rays




Measurement of the Fast Neutron Capture Cross Section of 238U Relative to 235U(n,f).

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Page : pages

File Size : 20,68 MB

Release : 1979

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The capture cross section of /sup 238/U was measured using the activation technique and /sup 235/U(n,f) as a reference cross section. Capture events were measured by detection of two prominent ..gamma..-transitions in the decay of the /sup 239/U daughter nuclide, /sup 239/Np, employing a high resolution Ge(Li) detector. The system was calibrated with samples activated in a thermal neutron flux relative to the capture cross section of gold, and with an absolutely calibrated ..cap alpha..-emitter, /sup 243/Am, which decays to /sup 239/Np. Cross section measurements were carried out in the neutron energy range from 30 keV to 3 MeV. Emphasis was on absolute values between 150 keV and 1 MeV where the /sup 238/U(n,..gamma..) cross section and its cross section is small. Background from fission products was found to restrict the accuracy of the measured data at energies > 1.5 MeV.









Nuclear Forensic Analysis

Author : Kenton J. Moody

Publisher : CRC Press

Page : 516 pages

File Size : 22,85 MB

Release : 2014-12-10

Category : Law

ISBN : 143988062X

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Book Description

Now in its second edition, Nuclear Forensic Analysis provides a multidisciplinary reference for forensic scientists, analytical and nuclear chemists, and nuclear physicists in one convenient source. The authors focus particularly on the chemical, physical, and nuclear aspects associated with the production or interrogation of a radioactive sample.





Photoneutron Sources

Author : B. W. Sargent

Publisher :

Page : 8 pages

File Size : 20,78 MB

Release : 1946

Category : Neutron sources

ISBN :

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