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Title: REPORT FOR GENERAL RESEARCH OCTOBER 29, 1951 TO JANUARY 28, 1952. (Supporting Research volume)

Publication Date:
Research Org.:
Mound Lab.
Sponsoring Org.:
USDOE
OSTI Identifier:
4404277
Report Number(s):
MLM-658
NSA Number:
NSA-06-004145
Resource Type:
Technical Report
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-52
Country of Publication:
Country unknown/Code not available
Language:
English
Subject:
PHYSICS; AIR- ALPHA PARTICLES- BACKGROUND- CONTAMINATION- GAMMA RADIATION- MONITORING- SCINTILLATION COUNTERS; ALPHA DETECTION- CONFIGURATION- STANDARDS; ALPHA DETECTION- PLATES; AMPLIFIERS- CIRCUITS- ELECTRONIC EQUIPMENT- RECORDING SYSTEMS; COATING- FILMS- POLYMERS- PREPARATION; MEASURED VALUES- SOLUTIONS- VELOCITY- VISCOSITY

Citation Formats

None. REPORT FOR GENERAL RESEARCH OCTOBER 29, 1951 TO JANUARY 28, 1952. (Supporting Research volume). Country unknown/Code not available: N. p., 1952. Web. doi:10.2172/4404277.
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None. REPORT FOR GENERAL RESEARCH OCTOBER 29, 1951 TO JANUARY 28, 1952. (Supporting Research volume). Country unknown/Code not available. doi:10.2172/4404277.
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None. Sat . "REPORT FOR GENERAL RESEARCH OCTOBER 29, 1951 TO JANUARY 28, 1952. (Supporting Research volume)". Country unknown/Code not available. doi:10.2172/4404277. https://www.osti.gov/servlets/purl/4404277.
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@article{osti_4404277,
title = {REPORT FOR GENERAL RESEARCH OCTOBER 29, 1951 TO JANUARY 28, 1952. (Supporting Research volume)},
author = {None},
abstractNote = {},
doi = {10.2172/4404277},
journal = {},
number = ,
volume = ,
place = {Country unknown/Code not available},
year = {Sat Mar 01 00:00:00 EST 1952},
month = {Sat Mar 01 00:00:00 EST 1952}
}
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Technical Report:
View Technical Report (0.88 MB)
DOI:  10.2172/4404277
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  • This volume presents the quarterly results of that portion of the research and development which is directed towards establishing new techniques and instruments and towards improving present methods for determining levels of radioactivity accurately and safely. The locally developed amplifier of high gain and of wide dynamic range has been shown to provide plateaus suitable for the simultaneous counting of alpha and beta particles. Commercially available amplifiers have failed to exhibit suitable plateaus when used under the same conditions. This locally developed amplifier in conjunction with the Nuclear Instruments PC1 chamber has made it possible to estimate beta energies downmore » to 0.02 million electron volt, which is to be compared to a former lower limit of 0.1 million electron volt. A fast neutron survey meter must be simple, lightweight, portable and efficient and must provide discrimination against gamma rays. The first step, which is the design of a suitable detecting device has been successfully completed as good efficiency and good discrimination against gamma rays have been achieved. The necessary electronic circuits must now be engineered to provide the requisite simplicity lightweight and portability.« less

  • The efficient prosecution of the research and process development on polonium, radium, actinium, waste disposal, and alpha-neutron sources requires the use of a wide variety of instrumental techniques such as: alpha, beta, gamma, and neutron counters and survey meters; emission, absorption, and mass spectroscopy: x-ray and electron diffraction; microbalances; and calorimeters. The complex and kaleidoscopic aspects of our research program require; (1) The application of standard instruments and techniques to a variety of problems; (2) The development of new techniques for the use of standard instruments; and (3) The development of new or improved Instruments. The sum of the abovemore » three categories constitutes the field of supporting research. The amplifier for counting pulses of wide dynamic range which was developed for counting beta particles in the presence of alphas has operated so satisfactorily that it has been decided to attempt to adopt it for neutron counting. Substantial improvement at medium counting rates has already been obtained but results at high counting rates are not as satisfactory. The development of a survey meter for monitoring fast neutrons has been under way for sometime. The attainment of higher efficiency has been attempted by the use of a dual-chambered counter tube. The tube operates with a filling of methane gas at two atmospheres pressure. The achievement of leak-proof seals and highest purity methane has been under investigation as their necessity has been indicated by tests. The development of a scintillation counter for surveying and measuring low levels of alpha activity has been continued. Recent efforts have been directed towards determining the correct voltages to be applied to the photomultiplier tube in order to operate under optimum conditions. Recent tests of the coincidence counter to detect scintillations in water containing alpha-active waste material have indicated the necessity of obtaining photomultiplier tubes with low noise level and a better regulated, noise-free power supply.« less