Moderation Of Neutron Spectra

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Moderation Of Neutron Spectra

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Author :
language : en
Publisher:
Release Date : 1997

Moderation Of Neutron Spectra written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.

Most of the accelerators that produce the various microenergetic neutron sources required for low-energy neutron dosimetry studies have been shut down. One alternative to accelerator-produced sources is the use of fission neutron or ([alpha], n) sources with unique neutron spectra. The problem with this solution is that maintenance of these sources is impractical. To help overcome this impracticality, the authors propose the use of moderating materials to produce a variety of spectra using a minimum number of sources. In the study, they performed Monte Carlo transport calculations under the following conditions: transporting neutrons from bare 252Cf or 241Am-Be sources from the center of various-sized spheres; tallying neutron spectra at 50 cm from the source. Of the twelve different moderating materials they studied, they found pure copper to be an ideal moderator. In this paper, they present flux-weighted energies, neutron spectra, and dose information for both 252Cf and 241Am-Be sources in bare and six-moderator configurations.

Flux And Spectral Measurements Of Primary And Moderated Neutron Sources

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Author : E. Tochilin
language : en
Publisher:
Release Date : 1962

Flux And Spectral Measurements Of Primary And Moderated Neutron Sources written by E. Tochilin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1962 with Neutron flux categories.

Radioactive (a, n) neutron sources include Ra-Be, PuF4, and four PuBe13 sources. Comparative neutron emission rates were determined by two separate methods: (1) the manganese sulfate bath with appropriate corrections made for fast neutron escape or capture and for thermal neutron capture by the source; and (2) long counter measurements corrected for energy response and so rce anisotropy. Agreement to within 1 percent was obtained by the two independent methods. A Ra-Be source calibrated against the NBS neutron standard was used as a primary reference Spectral measurements of PuBe13 and PuF4 neutron sources were made with nuclear emulsions. By the use of cylindrical plastic and lead absorbers, an effort was made to moderate the PuBe13 spectrum and thereby obtain additional calibration points for instrument response studies. Spectral changes were initially studied with the doublemoderator technique, followed by later measurements with nuclear emulsions. From flux and spectral measurements of the primary and moderated radioactive sources, the first collision tissue dose was calculated and, in turn, compared to experimental measurements of absorbed dose with proportional counters designed according to the Bragg-Gray principle. (Author).

Neutron Energy Spectrum In D2o

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Author : H. D. Brown
language : en
Publisher:
Release Date : 1954

Neutron Energy Spectrum In D2o written by H. D. Brown and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1954 with Heavy water reactors categories.

Double Moderator Neutron Dosimeter

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Author : J. De Pangher
language : en
Publisher:
Release Date : 1958

Double Moderator Neutron Dosimeter written by J. De Pangher and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1958 with Dosimeters categories.

The Effects Of Atomic Motions On The Moderation Of Neutrons

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Author : Donald E. Parks
language : en
Publisher:
Release Date : 1960

The Effects Of Atomic Motions On The Moderation Of Neutrons written by Donald E. Parks and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1960 with Molecular theory categories.

Study Of The Neutron Spectra Emerging From Moderating Assemblies

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Author : R. Ramanna
language : en
Publisher:
Release Date : 1960

Study Of The Neutron Spectra Emerging From Moderating Assemblies written by R. Ramanna and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1960 with categories.

Experimental Neutron Spectra In A Cylinder Of Hot Moderator

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Author : C. B. Bigham
language : en
Publisher:
Release Date : 1962

Experimental Neutron Spectra In A Cylinder Of Hot Moderator written by C. B. Bigham and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1962 with categories.

Thermal Neutron Spectrum In Harmonically Bound Hydrogen Moderators

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Author : E. R. Cohen
language : en
Publisher:
Release Date : 1959

Thermal Neutron Spectrum In Harmonically Bound Hydrogen Moderators written by E. R. Cohen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1959 with Binding energy categories.

Neutron Energy Spectra In Water

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Author : H. Dean Brown
language : en
Publisher:
Release Date : 1956

Neutron Energy Spectra In Water written by H. Dean Brown and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1956 with Neutrons categories.

Neutron Thermalization In A Heavy Moderator With An Absorption Resonance

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Author : E. R. Cohen
language : en
Publisher:
Release Date : 1960

Neutron Thermalization In A Heavy Moderator With An Absorption Resonance written by E. R. Cohen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1960 with Neutron resonance categories.