Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Measurements of degraded fission-neutron spectra using recoil proportional counters are done routinely for studies involving fast reactor mockups. The same techniques are applicable to measurements of neutron spectra required for personnel dosimetry in fast neutron environments. A brief discussion of current applications of these methods together with the results of a measurement made on the LITTLE BOY assembly at Los Alamos are here described.
Neutron Spectrum Measurements Using Proton Recoil Proportional Counters
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Measurements of degraded fission-neutron spectra using recoil proportional counters are done routinely for studies involving fast reactor mockups. The same techniques are applicable to measurements of neutron spectra required for personnel dosimetry in fast neutron environments. A brief discussion of current applications of these methods together with the results of a measurement made on the LITTLE BOY assembly at Los Alamos are here described.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Measurements of degraded fission-neutron spectra using recoil proportional counters are done routinely for studies involving fast reactor mockups. The same techniques are applicable to measurements of neutron spectra required for personnel dosimetry in fast neutron environments. A brief discussion of current applications of these methods together with the results of a measurement made on the LITTLE BOY assembly at Los Alamos are here described.
A Study of the 1/E Slowing-down Neutron Spectrum Using 4[pi]-recoil Proportional Counters
Author: Edgar F. Bennett
Publisher:
ISBN:
Category : Neutron counters
Languages : en
Pages : 46
Book Description
The response to a 1/E neutron spectrum of a hydrogen-filled proportional counter in the energy region below 100 keV was studied using pulse-shape discrimination to reject gamma-induced background. The observed proton-recoil distributions permitted an evaluation of W (the energy loss per ion pair) for protons in hydrogen below 19 keV. Some problems associated with the use of 4Pi-recoil proportional counters as neutron spectrometers were considered including calibration, optimization of neutron-to-gamma ratios, and resolving power.
Publisher:
ISBN:
Category : Neutron counters
Languages : en
Pages : 46
Book Description
The response to a 1/E neutron spectrum of a hydrogen-filled proportional counter in the energy region below 100 keV was studied using pulse-shape discrimination to reject gamma-induced background. The observed proton-recoil distributions permitted an evaluation of W (the energy loss per ion pair) for protons in hydrogen below 19 keV. Some problems associated with the use of 4Pi-recoil proportional counters as neutron spectrometers were considered including calibration, optimization of neutron-to-gamma ratios, and resolving power.
Measurement of neutron spectra with hydrogen proportional counters
Author: R. Birch
Publisher:
ISBN: 9780705808798
Category : Neutrons
Languages : en
Pages : 22
Book Description
Publisher:
ISBN: 9780705808798
Category : Neutrons
Languages : en
Pages : 22
Book Description
Measurement of neutron spectra with hydrogen proportional counters : part 2 : analysis of proton recoil distributions
Spectrum Measurements of Radioactive Neutron Sources in the 10 KeV - 10 MeV Energy Region with Proton-recoil Proportional Counters
Measurement of Neutron Flux and Spectra for Physical and Biological Applications
Author: National Committee on Radiation Protection and Measurements (U.S.)
Publisher:
ISBN:
Category : Neutron flux
Languages : en
Pages : 104
Book Description
Publisher:
ISBN:
Category : Neutron flux
Languages : en
Pages : 104
Book Description
Measurement of Neutron Flux and Spectra for Physical and Biological Applications
Author: National Committee on Radiation Protection and Measurements (U.S.)
Publisher:
ISBN:
Category : Neutrons
Languages : en
Pages : 104
Book Description
Publisher:
ISBN:
Category : Neutrons
Languages : en
Pages : 104
Book Description
A Continuous Mode Data Acquisition Technique for Proton Recoil Proportional Counter Neutron Spectrometers
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The existing proton recoil proportional counter measurement technique used at FNS for joint FNS-ANL fusion blanket neutron spectroscopy requires that numerous piece-wise (but overlapping) measurements be carried out at a sequence of fixed counter voltages. The composite results of all of these independent measurements are required to construct a single neutron spectrum. This approach has been found to be both inefficient and subject to systematic errors. An alternative approach, in which data is acquired continuously using a slow time modulation of the high voltage bias supply, is here described. The electronics requirements are consistent with the basic detector/amplifier systems now operable at FNS. Some additional hardware including a programmable high voltage bias supply and a random amplitude test pulse generator are necessary. A description of the electronics and data acquisition hardware for these measurements will be provided at a later date. In this report we emphasize the numerical procedures involved to acquire and reduce data, and provide an illustrative example using one of the hardest neutron spectra readily available for this work at ANL. 6 refs., 26 figs.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The existing proton recoil proportional counter measurement technique used at FNS for joint FNS-ANL fusion blanket neutron spectroscopy requires that numerous piece-wise (but overlapping) measurements be carried out at a sequence of fixed counter voltages. The composite results of all of these independent measurements are required to construct a single neutron spectrum. This approach has been found to be both inefficient and subject to systematic errors. An alternative approach, in which data is acquired continuously using a slow time modulation of the high voltage bias supply, is here described. The electronics requirements are consistent with the basic detector/amplifier systems now operable at FNS. Some additional hardware including a programmable high voltage bias supply and a random amplitude test pulse generator are necessary. A description of the electronics and data acquisition hardware for these measurements will be provided at a later date. In this report we emphasize the numerical procedures involved to acquire and reduce data, and provide an illustrative example using one of the hardest neutron spectra readily available for this work at ANL. 6 refs., 26 figs.
Some Aspects of the Use of Proton Recoil Proportional Counters for Fast Neutron Personnel Dosimeters
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Gas-filled proton recoil proportional counters have been used extensively for the measurement of neutron spectra in degraded fission-spectrum environments. Some considerations relating to the use of these counters for personnel dosimetry are here described. High sensitivity and good accuracy in the determination of dose-equivalent can be obtained if relatively high pressure hydrogen-filled proportional counters are used as the active element in a dosimeter system.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Gas-filled proton recoil proportional counters have been used extensively for the measurement of neutron spectra in degraded fission-spectrum environments. Some considerations relating to the use of these counters for personnel dosimetry are here described. High sensitivity and good accuracy in the determination of dose-equivalent can be obtained if relatively high pressure hydrogen-filled proportional counters are used as the active element in a dosimeter system.