Author: S. Whittlestone
Publisher:
ISBN:
Category : Neutrons
Languages : en
Pages :
Book Description
Neutron Energy Spectra from the Thick Target Beryllium 9(d,n) Boron 10 Reaction
Author: S. Whittlestone
Publisher:
ISBN:
Category : Neutrons
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category : Neutrons
Languages : en
Pages :
Book Description
Neutron Energy Spectra from the Thick Target 9Be(d,n)10 B Reaction
Author: Stewart Whittlestone
Publisher:
ISBN: 9780642997647
Category : Beryllium
Languages : en
Pages : 5
Book Description
Publisher:
ISBN: 9780642997647
Category : Beryllium
Languages : en
Pages : 5
Book Description
Spectrum of Neutrons Emitted from a Thick Beryllium Target Bombarded with 7 MeV Deuterons
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The spectrum of neutrons emitted from a thick beryllium target bombarded with 7 MeV deuterons is measured at 25 reaction angles distributed between 0° and 158°, and over the neutron energy range approx. =0.8 to11.0 MeV. The spectrum is determined relative to the standard 252Cf prompt-fission-neutron-spectrum using fast time-of-flight techniques. The results are presented as angle-energy differential distributions and as relative numerical group cross sections suitable for establishing a reference field for applied studies. 24 refs., 4 figs.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The spectrum of neutrons emitted from a thick beryllium target bombarded with 7 MeV deuterons is measured at 25 reaction angles distributed between 0° and 158°, and over the neutron energy range approx. =0.8 to11.0 MeV. The spectrum is determined relative to the standard 252Cf prompt-fission-neutron-spectrum using fast time-of-flight techniques. The results are presented as angle-energy differential distributions and as relative numerical group cross sections suitable for establishing a reference field for applied studies. 24 refs., 4 figs.
Measurement of the Neutron Spectrum from the Reaction of 30-MeV Deuterons on a Thick Beryllium Target
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Measurements were made of the neutron spectrum produced by bombarding a thick beryllium target with 30-MeV deuterons at the University of California, Davis cyclotron. This spectrum is of interest in studying the effect of neutrons on materials to be used in future fusion reactors. The spectrum was inferred from the activation of two sets of detector foils placed at 0° to the deuteron beam, one immediately behind the beryllium target block, and one 40 mm to the rear. A least-squares program was used to analyze the foil activation data to obtain the fluence in each of seven energy groups. The neutron spectrum (fluence/MeV) close to the target decreases continuously with energy in the range 5-32 MeV, while the spectrum 40 mm back has a peak at about 13 MeV. The contribution from neutrons of energies less than 10 MeV is much greater than that found in previous spectral measurements made at large distances from the target. This difference is attributed to the neutrons which are emitted at large angles from the deuteron beam. These observations show the importance of evaluating the neutron spectrum near the target if samples of materials are to be irradiated in this location. (auth).
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Measurements were made of the neutron spectrum produced by bombarding a thick beryllium target with 30-MeV deuterons at the University of California, Davis cyclotron. This spectrum is of interest in studying the effect of neutrons on materials to be used in future fusion reactors. The spectrum was inferred from the activation of two sets of detector foils placed at 0° to the deuteron beam, one immediately behind the beryllium target block, and one 40 mm to the rear. A least-squares program was used to analyze the foil activation data to obtain the fluence in each of seven energy groups. The neutron spectrum (fluence/MeV) close to the target decreases continuously with energy in the range 5-32 MeV, while the spectrum 40 mm back has a peak at about 13 MeV. The contribution from neutrons of energies less than 10 MeV is much greater than that found in previous spectral measurements made at large distances from the target. This difference is attributed to the neutrons which are emitted at large angles from the deuteron beam. These observations show the importance of evaluating the neutron spectrum near the target if samples of materials are to be irradiated in this location. (auth).
Neutron Spectra from 30-MeV Deuterons on a Thick Beryllium Target. [Cross Sections].
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The neutron spectra produced by bombarding a thick beryllium target with 30-MeV deuterons at the University of California, Davis, cyclotron was measured. These spectra are of interest in studying the effect of neutrons on materials to be used in future fusion reactors. The spectra were inferred from the activation of two sets of detector foils placed at an angle THETA = 0° to the deuteron beam, one immediately behind the beryllium target block, and one 40 mm to the rear. The SAND-II program was used to analyze the foil activation data to obtain the fluence in each of one hundred energy groups. The neutron spectrum (fluence/MeV) close to the target decreases continuously with energy in the range 2 to 30 MeV, while the spectrum 40 mm back has a minimum at about 8 MeV and a peak at about 14 MeV. The contribution from neutrons of energies less than 10 MeV is much greater than that found in previous spectral measurements made at large distances from the target. This difference is attributed to the neutrons which are emitted at large angles from the deuteron beam. These observations show the importance of evaluating the neutron spectrum near the target if samples of materials are to be irradiated in this location.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The neutron spectra produced by bombarding a thick beryllium target with 30-MeV deuterons at the University of California, Davis, cyclotron was measured. These spectra are of interest in studying the effect of neutrons on materials to be used in future fusion reactors. The spectra were inferred from the activation of two sets of detector foils placed at an angle THETA = 0° to the deuteron beam, one immediately behind the beryllium target block, and one 40 mm to the rear. The SAND-II program was used to analyze the foil activation data to obtain the fluence in each of one hundred energy groups. The neutron spectrum (fluence/MeV) close to the target decreases continuously with energy in the range 2 to 30 MeV, while the spectrum 40 mm back has a minimum at about 8 MeV and a peak at about 14 MeV. The contribution from neutrons of energies less than 10 MeV is much greater than that found in previous spectral measurements made at large distances from the target. This difference is attributed to the neutrons which are emitted at large angles from the deuteron beam. These observations show the importance of evaluating the neutron spectrum near the target if samples of materials are to be irradiated in this location.
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
Neutron Spectra at 0° from 83.7-MeV Deuteron Bombardment of a Thick Beryllium Target
Energy Spectra and Angular Dependences of Neutrons from the 31.5-Mev Proton Bombardment of Beryllium-9, Nitrogen-14, and Aluminum-27
Author: Harold E. Adelson
Publisher:
ISBN:
Category : Aluminum
Languages : en
Pages : 120
Book Description
Publisher:
ISBN:
Category : Aluminum
Languages : en
Pages : 120
Book Description
The Thick-target 9Be(d, N) Neutron Spectra for Deuteron Energies Between 2.6 and 7.0-MeV.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 49
Book Description
The measurement of the zero deg. neutron spectra and yields from deuterons incident on thick beryllium metal targets is described. 235U and 238U fission ion chambers were used as neutron detectors to span the neutron energy range above 0.05-MeV with a time resolution of (less-than or equal to) 3 nanosec. Measurements were made for incident deuteron energies from 2.6 to 7.0-MeV, at 0.4-MeV intervals, using time-of-flight techniques with flight paths of 2.7 and 6.8 meters. The results are presented in graphical form and in tables.
Publisher:
ISBN:
Category :
Languages : en
Pages : 49
Book Description
The measurement of the zero deg. neutron spectra and yields from deuterons incident on thick beryllium metal targets is described. 235U and 238U fission ion chambers were used as neutron detectors to span the neutron energy range above 0.05-MeV with a time resolution of (less-than or equal to) 3 nanosec. Measurements were made for incident deuteron energies from 2.6 to 7.0-MeV, at 0.4-MeV intervals, using time-of-flight techniques with flight paths of 2.7 and 6.8 meters. The results are presented in graphical form and in tables.
Investigation of Thick-target Neutron Emission from Be-9(d, N)B-10 at E
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Double-differential measurements of neutron emission from a thick beryllium target bombarded with 7-MeV deuterons are made for neutrons above 800 keV, over the angular range of 0 to 155°. The angular dependence of the neutron yield is found to be quite anisotropic. The importance of this anisotropy in integral neutron-induced reaction cross-section investigations is illustrated. 7 refs.,
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Double-differential measurements of neutron emission from a thick beryllium target bombarded with 7-MeV deuterons are made for neutrons above 800 keV, over the angular range of 0 to 155°. The angular dependence of the neutron yield is found to be quite anisotropic. The importance of this anisotropy in integral neutron-induced reaction cross-section investigations is illustrated. 7 refs.,