Author: M. Edward Anderson
Publisher:
ISBN:
Category : Beryllium
Languages : en
Pages : 40
Book Description
The Neutron Spectrum of a Plutonium-beryllium Source
Author: M. Edward Anderson
Publisher:
ISBN:
Category : Beryllium
Languages : en
Pages : 40
Book Description
Publisher:
ISBN:
Category : Beryllium
Languages : en
Pages : 40
Book Description
Determination of the neutron spectrum and absolute yield of a plutonium-beryllium source
Author: Leona Miller Stewart
Publisher:
ISBN:
Category : Neutrons
Languages : en
Pages : 88
Book Description
Publisher:
ISBN:
Category : Neutrons
Languages : en
Pages : 88
Book Description
Ages of Plutonium-beryllium Neutrons in Tungsten-water Media
Plutonium Beryllium Neutron Source as a Secondary Calibration Standard
Author: John A. Devanney
Publisher:
ISBN:
Category :
Languages : en
Pages : 36
Book Description
Plutonium-Beryllium (Pu-Be) neutron sources are calibrated with respect to total output, using a manganese-sulfate bath. When such sources are used as a point isotropic, secondary standard, inaccuracies occur due to the following reasons: (1) The neutron output is not isotropic, (2) the neutron output increases with time due to the build-up of Americium-241, resulting from the impurity of Plutonium-241, (3) the output spectrum is continuous from approximately 0.5 MeV to 10 MeV, (4) gamma rays exceed the number of neutrons emitted from the source. This report (1) presents the angular distribution of the neutron output of an 80 gram (4.81 curie) Plutonium-Beryllium neutron source, (2) shows that the increase in neutron output, due to the build-up of Americium-241 is 5.3 percent for a period of 43 months, (3) presents the neutron and gamma ray spectral distribution and intensity, (4) shows a neutron to gamma ray intensity ratio of 0.61:1 and a neutron to gamma ray dose (first collision-rads tissue) ratio of 9.36:1, (5) shows that a correction factor of 6.6 percent is required when the source is used as a point isotropic source of neutrons. (Author).
Publisher:
ISBN:
Category :
Languages : en
Pages : 36
Book Description
Plutonium-Beryllium (Pu-Be) neutron sources are calibrated with respect to total output, using a manganese-sulfate bath. When such sources are used as a point isotropic, secondary standard, inaccuracies occur due to the following reasons: (1) The neutron output is not isotropic, (2) the neutron output increases with time due to the build-up of Americium-241, resulting from the impurity of Plutonium-241, (3) the output spectrum is continuous from approximately 0.5 MeV to 10 MeV, (4) gamma rays exceed the number of neutrons emitted from the source. This report (1) presents the angular distribution of the neutron output of an 80 gram (4.81 curie) Plutonium-Beryllium neutron source, (2) shows that the increase in neutron output, due to the build-up of Americium-241 is 5.3 percent for a period of 43 months, (3) presents the neutron and gamma ray spectral distribution and intensity, (4) shows a neutron to gamma ray intensity ratio of 0.61:1 and a neutron to gamma ray dose (first collision-rads tissue) ratio of 9.36:1, (5) shows that a correction factor of 6.6 percent is required when the source is used as a point isotropic source of neutrons. (Author).
The Spectrum of Polonium-beryllium Neutron Sources
Author: R. J. Breen
Publisher:
ISBN:
Category : Beryllium
Languages : en
Pages : 56
Book Description
Publisher:
ISBN:
Category : Beryllium
Languages : en
Pages : 56
Book Description
Neutron Spectra from Mock Fission Sources
Author: Eugene Tochilin
Publisher:
ISBN:
Category : Neutron flux
Languages : en
Pages : 30
Book Description
Publisher:
ISBN:
Category : Neutron flux
Languages : en
Pages : 30
Book Description
The Neutron Spectra of Po-B and Po-Be
Author: I. H. Perlman
Publisher:
ISBN:
Category : Neutrons
Languages : en
Pages : 22
Book Description
Publisher:
ISBN:
Category : Neutrons
Languages : en
Pages : 22
Book Description
The Neutron Energy Spectrum of a Radium Beryllium Source
Author: Warren Frederick David
Publisher:
ISBN:
Category :
Languages : en
Pages : 28
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 28
Book Description
Preparation of a Large Plutonium-Beryllium Neutron Source
Author: Atomic Energy of Canada Limited
Publisher:
ISBN:
Category :
Languages : en
Pages : 5
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 5
Book Description
Energy Spectra of Radioactive Neutron Sources
Author: Hermanus Pauw
Publisher:
ISBN:
Category : Neutrons
Languages : en
Pages : 98
Book Description
Publisher:
ISBN:
Category : Neutrons
Languages : en
Pages : 98
Book Description