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Title: NEUTRON MEASURING METHOD AND APPARATUS

Abstract

A fast neutron fission detecting apparatus is described consisting of a source of fast neutrons, an ion chamber containing air, two electrodes within the ion chamber in confronting spaced relationship, a high voltage potential placed across the electrodes, a shield placed about the source, and a suitable pulse annplifier and recording system in the electrode circuit to record the impulse due to fissions in a sannple material. The sample material is coated onto the active surface of the disc electrode and shielding means of a material having high neutron capture capabilities for thermal neutrons are provided in the vicinity of the electrodes and about the ion chamber so as to absorb slow neutrons of thermal energy to effectively prevent their diffusing back to the sample and causing an error in the measurement of fast neutron fissions.

Inventors:
; ;
Issue Date:
OSTI Identifier:
4304387
Patent Number(s):
2845544
Assignee:
U.S. Atomic Energy Commission
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
NSA Number:
NSA-13-000998
Resource Type:
Patent
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-59
Country of Publication:
United States
Language:
English
Subject:
PATENTS; AIR; AMPLIFIERS; CAPTURE; CIRCUITS; COATING; ELECTRIC POTENTIAL; ELECTRODES; FAST NEUTRONS; FISSION; IONIZATION CHAMBERS; MEASURED VALUES; NEUTRON SOURCES; NEUTRONS; PLATES; RADIATION DETECTORS; RECORDING SYSTEMS; SHIELDING

Citation Formats

Seaborg, G T, Friedlander, G, and Gofman, J W. NEUTRON MEASURING METHOD AND APPARATUS. United States: N. p., 1958. Web.
Seaborg, G T, Friedlander, G, & Gofman, J W. NEUTRON MEASURING METHOD AND APPARATUS. United States.
Seaborg, G T, Friedlander, G, and Gofman, J W. Tue . "NEUTRON MEASURING METHOD AND APPARATUS". United States.
@article{osti_4304387,
title = {NEUTRON MEASURING METHOD AND APPARATUS},
author = {Seaborg, G T and Friedlander, G and Gofman, J W},
abstractNote = {A fast neutron fission detecting apparatus is described consisting of a source of fast neutrons, an ion chamber containing air, two electrodes within the ion chamber in confronting spaced relationship, a high voltage potential placed across the electrodes, a shield placed about the source, and a suitable pulse annplifier and recording system in the electrode circuit to record the impulse due to fissions in a sannple material. The sample material is coated onto the active surface of the disc electrode and shielding means of a material having high neutron capture capabilities for thermal neutrons are provided in the vicinity of the electrodes and about the ion chamber so as to absorb slow neutrons of thermal energy to effectively prevent their diffusing back to the sample and causing an error in the measurement of fast neutron fissions.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1958},
month = {7}
}