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918
National Advisory Committee for Aeronautics Collection
742
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262
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101
Harris and Eliza Kempner
5
Stillwater History Museum at the Sheerar, Stillwater, Oklahoma
3
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NACA Research Memorandums
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103
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22
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15
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N-17, A Delayed Neutron Emitter
The decay scheme of a 4.2 second neutron emitter has been investigated in detail. Chemical and physical evidence shows that it is N{sup 17}, which emits beta rays to a broad excited state of O{sup 17}, which then breaks up into a neutron plus O{sup 16}. The energy spectrum of the neutrons is determined by measuring the energies of the O{sup 16} recoils in a proportional counter. The neutrons have a most probable energy of 0.9 Mev, a 'half width' of less than .5 Mev, and an upper limit of about 2 Mev. {beta}-recoil coincidences are observed, as predicted by the Bohr-Wheeler theory, and the {beta}-ray energy is measured by absorption. The beta rays in coincidence with neutrons have an upper limit of 3.7 {+-} 0.2 Mev. Beta-rays directly to the ground stat of O{sup 17} are not observed because of high background effects, but should have an energy of 8.7 Mev. Some evidence is presented to show that energy is conserved in the {beta}-n transition through the broad excited state in O{sup 17}.
Date:
November 5, 1948
Creator:
Alvarez, L. W.
System:
The UNT Digital Library
A 48-Channel Pulse Height Analyzer for Alpha Energy Measurements
Investigation report of new artificial heavy nuclides conducted at the laboratory.
Date:
October 1, 1948
Creator:
Ghiorso, A.; Jaffey, A. H.; Robinson, H. P. & Weissbourd, B.
System:
The UNT Digital Library
100 Area Water Study
This paper gives a cost breakdown of all the water facilities in the 100-F area for the month of January, 1948. Also given is the cost of chlorine for addition to the process water system along with where it is added and in what amounts. Lastly, the average figure for the hardness for the Columbia River water at Hanford.
Date:
September 23, 1948
Creator:
Beekman, S. W.
System:
The UNT Digital Library
100 Areas technical activities report -- Engineering, June, 1948
This report covers work done by the Pile Engineering Groups and work done on special assignments. Topics covered include: slug blistering and corrosion; graphite allocation to DR pile; slug molding; segmental discharge; Van Stone corrosion; flow laboratory modifications; downcomer at B pile; downcomer at D pile; annealing of pile graphite; replacement of pile atmosphere with CO{sub 2}; unit motion; beta experiment; can opening; slug annealing; new technical building, 300 area; and ruptured slugs.
Date:
July 19, 1948
Creator:
Woods, W. K.
System:
The UNT Digital Library
200 Area stack contamination. Interim report, August 2, 1948--October 11, 1948
In connection with the problem of eliminating contamination of the atmosphere by the exhaust from the 221 Building ventilation air stacks, sand filters were previously recommended. Construction of a sand filter in West Area is about completed and construction of a filter in East Area is well underway. This report summarizes the status, technical findings, and comments and suggestions since the writer`s last Interim Report, dated August 6, 1948, was issued.
Date:
October 11, 1948
Creator:
Lapple, C. E.
System:
The UNT Digital Library
200 areas contaminated particle discharge
None
Date:
December 15, 1948
Creator:
unknown
System:
The UNT Digital Library
234-5 Project specification letter 234-41, 235-41 (Supplement D), Chemical Development Laboratory
This letter itemizes the miscellaneous equipment and supplies not previously specified which should be ordered to equip the 234-5 Chemical Development Laboratory. Equipment currently carried in store stock is not included in this list. The vendor is given only to identify the item or as a suggested source of supply.
Date:
October 22, 1948
Creator:
Work, J.B.
System:
The UNT Digital Library
234-5 Project ventilation specifications
This brief memo from the 300 area of the Hanford plant, July 13, 1948, describes the need to redesign the ventilation system so as to minimize hazards associated with performing maintenance work.
Date:
July 13, 1948
Creator:
Work, J.B.
System:
The UNT Digital Library
291-T Emergency Exhaust Air Scrubbers
None
Date:
July 16, 1948
Creator:
Stainken, F. A. R.
System:
The UNT Digital Library
The Accumulation of Radioactivity as Shown by a Limnological Study of the Columbia River in the Vicinity of Hanford Works : Preliminary Report
The following report provides data collected during an investigation in the Columbia River. The purpose of this investigation was to research the radioactivity present in the bottom-living organisms of the river.
Date:
November 12, 1948
Creator:
Coopey, R. W.
System:
The UNT Digital Library
Accuracy of Airspeed Measurements and Flight Calibration Procedures
From Summary: "The sources of error that may enter into the measurement of airspeed by pitot-static methods are reviewed in detail together with methods of flight calibration of airspeed installations. Special attention is given to the problem of accurate measurements of airspeed under conditions of high speed and maneuverability required of military airplanes." (author).
Date:
1948
Creator:
Huston, Wilber B.
System:
The UNT Digital Library
Activation Cross Sections by Boron Absorption
The following report studies the neutron activation cross-sections with the insertion of boron absorbers in the energy region 10 to 20,000 ev and the elements within the range.
Date:
1948
Creator:
Dancoff, Sidney M., 1913-1951; Kubitschek, H.; Lichtenberger, H. V.; Monk, G. D. & Nobles, R. G.
System:
The UNT Digital Library
The Activity Coefficient of Plutonium(IV) Salts in Acidic Solutions
Summary: The activity coefficient of Pu(Cl04)4 was measured in perchloric acid solutions. The procedure used was to measure the extraction of the neutral plutonium(IV)-TTA chelate into benzene-TTA solutions at different perchloric acid concentrations. Equations are presented which show the relation of the extraction coefficients, obtained in the above manner, to the activity coefficient of plutonium(IV) per-chlorate. The activity coefficient of Pu(Cl0~)4 is similar to that of a strong acid, e.g., perchloric acid, in that its value increases rapidly when the perchloric acid concentration becomes greater than 2M. The distribution coefficient of TTA between benzene and aqueous perchloric acid solutions was found first to decrease slightly and then to increase two fold as the perchloric acid was varied from 0.01 to 6M. The activity coefficient of the uranous-TTA chelate in benzene was calculated from the results of solubility measurements. The values of the activity coefficient of UK4 are,within experimental error, identical with the values of the activity coefficient of TTA itself.
Date:
November 1948
Creator:
Connick, R. E. & Reas, W. H.
System:
The UNT Digital Library
Activity of fission products
This report compares the activity and disintegration energy of fission products from metal under two conditions of exposure: 200 Megawatt-days integrated exposure over a period of 180 days, and 400 Megawatt-days integrated exposure over a period of 360 days. (JL)
Date:
November 11, 1948
Creator:
Garbrecht, M. & Gillette, P. R.
System:
The UNT Digital Library
The Activity of the Coolant in Closed-Cycle Systems
None
Date:
September 7, 1948
Creator:
Feld, B. T.
System:
The UNT Digital Library
Acute Exposure to Polonium. (Medical Study of Three Human Cases)
Three individuals were inadvertently exposed to polonium. Activity determinations on the routine weekly urine samples submitted by the individuals revealed counts of 174, 734, and 2190 c/min/50 ml respectively. An investigation was immediately launched to determine the source of the exposure, since there was no report of a spill or accident involving active material. By the process of elimination, the time of exposure was narrowed down to a time when two of the individuals were engaged in the denitration of a polonium solution in a small kettie inside a hood when a leak developed in the kettle. The active solution was transferred from the kettle to a carboy. All three individuals were present during the transfer period. Two wore respirators, rubber gloves, and smocks over their coveralls while the third stood well behind and watched the procedure. However, it was concluded that an inhalation exposure resulted. A medical study of each case was instituted and data are summarized. No immediate toxic effects were observed. (C.H.)
Date:
March 1, 1948
Creator:
Naimark, D. H.
System:
The UNT Digital Library
The Acute Radiotoxicity of Injected Na²⁴ for Mice and Rats
The following report describes the results from studies based on the toxicity and metabolism of radioactive substances derived from uranium fission. Rats and mice were administered radioactive sodium and reactions and changes were studied.
Date:
April 15, 1948
Creator:
Finkle, R. D.; Snyder, R. H.; Kisieleski, Walter E.; Teresi, J.; Broido, A. & Tompkins, P. C.
System:
The UNT Digital Library
Additional Abstracts Pertaining to Seaplanes
"About 500 additional references pertaining to hydrodynamic design of seaplanes have been compiled, and the information is presented in the form of abstracts classified under six main headings:GENERAL INFORMATION, HYDROSTATICS, HYDRODYNAMICS, AERODYNAMICS, OPERATION, and RESEARCH. The compilation is an extension of NACA RM No. L6I13, entitled "Abstracts Pertaining to Seaplanes," by Jerold M. Bidwell and Douglas A. King. An author index and a subject index are included" (p. 1).
Date:
March 9, 1948
Creator:
Bidwell, Jerold M. & King, Douglas A.
System:
The UNT Digital Library
Additional design tasks for 234-5 Project
None
Date:
September 24, 1948
Creator:
unknown
System:
The UNT Digital Library
Additional free-flight tests of the rolling effectiveness of several wing-spoiler arrangements at high subsonic, transonic, and supersonic speeds
From Introduction: "The purpose of the present paper is to present results obtained recently relating to the characteristics of a full-span sharp-edge spoiler with an 0.02-chord projection above the wing surface at several chordwise positions and also to the relative effectiveness of the sharp-edge spoiler and a wedge-type spoiler located at the 80-percent-chord line."
Date:
November 24, 1948
Creator:
Strass, H. Kurt
System:
The UNT Digital Library
Additional Results in a Free-Flight Investigation of Control Effectiveness of Full-Span, 0.2-Chord Plain Ailerons at High Subsonic, Transonic, and Supersonic Speeds to Determine Some Effects of Wing Sweepback, Aspect Ratio, Taper, and Section Thickness Ratio
Report discussing an aerodynamic control effectiveness study using free-flight, rocket-propelled test vehicles. Information about the effects of wing sweepback, aspect ratio, taper ratio, and section thickness ratio on the rolling effectiveness of full-span, sealed ailerons is provided.
Date:
April 23, 1948
Creator:
Sandahl, Carl A. & Strass, H. Kurt
System:
The UNT Digital Library
Aerodynamic characteristics at high speeds of a two-blade NACA 10-(3)(062)-045 propeller and of a two-blade NACA 10-(3)(08)-045 propeller
From Introduction: "The aerodynamic characteristics of a series of 10-foot-diameter propellers are being investigated in the Langley 16-foot high-speed tunnel in a comprehensive propeller research program. Using high-critical-speed NACA 16-series airfoil sections (reference 1), these propellers are designed to have Betz minimum induced-energy loss loading (reference 2) for a blade angle of 45^o at the 0.7 radius, when used as a four-blade propeller operating at an advance ratio of approximately 2.1 The ultimate purpose of the program is to determine the influence upon propeller design factors and of compressiblity; the propeller tests reported herein form part of the investigation of the effects of blade-section thickness ratio."
Date:
October 1, 1948
Creator:
Solomon, William
System:
The UNT Digital Library
Aerodynamic characteristics at high speeds of full-scale propellers having Clark Y blade sections
From Introduction: "The single purpose of this paper is to make available the data obtained from tests of these two Clark Y section propellers as quickly as possible with no attempt being made to analyze the results or to compare them with other high-speed-propeller test results."
Date:
October 26, 1948
Creator:
Johnson, Peter J.
System:
The UNT Digital Library
Aerodynamic characteristics at high speeds of related full-scale propellers having different blade-section cambers
From Summary: "Wind-tunnel tests of a full-scale two-blade NACA 10-(10)(08)-03 (high camber) propeller have been made for a range of blade angles from 20 degrees to 55 degrees at airspeeds up to 500 miles per hour. The results of these tests have been compared with results from previous tests of the NACA 10-(3) (08)-03 (low camber) and NACA 10-(5)(08)-03 (medium camber) propellers to evaluate the effects of blade-section camber on propeller aerodynamic characteristics."
Date:
May 6, 1948
Creator:
Maynard, Julian D. & Salters, Leland B., Jr.
System:
The UNT Digital Library