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An Attempted Separation of Mercury Isotopes
The following document describes the analysis on an attempt at separating mercury isotopes by making their environments as widely different as possible.
Date:
April 30, 1942
Creator:
Kauzmann, Walter, 1916-
Object Type:
Report
System:
The UNT Digital Library
Report on the Coyote area district, Dolores Plateau area, Colorado
Report and corollary maps on the Coyote Mesa District, Dolores Plateau Area, Colorado
Date:
April 1943
Creator:
Wardwell, Henry Russel, 1913-
Object Type:
Report
System:
The UNT Digital Library
Memorandum Listing the Areas in Colorado, Utah, Arizona and New Mexico that are Geologically Favorable for Developing Large Reserves of Vanadium Ore by Prospecting
Introduction: Vanadium ore is being mined at many places in western Colorado, southeastern Utah, northeastern Arizona, and northwestern New Mexico (fig. 1). Eight mills in this region produced about 4,300,000 pounds of V2 05 in 1942, representing about 90 percent of the vanadium obtained from domestic sources. Although ore production has mostly exceeded mill capacity since 1937, production during the last half of 1942 averaged only about 19,000 tons or ore a month, whereas the capacity of these mills total about 22,000 tons a month. At the expected rate of ore production, ore stockpiles will be exhausted sometime in 1944, and these mills will then have excess capacity. With more intensive prospecting than now practiced, however, it is believed that sufficient reserves can be indicated to sustain capacity operation of these mills for several years. This memorandum is prepared to specify those areas that are considered most favorable from a geologic standpoint for developing large reserves of vanadium ore by prospecting. It is based on intensive studies by the Geological Survey since 1939 in most of the areas that produce vanadium ore.
Date:
April 10, 1943
Creator:
Fischer, R. P.
Object Type:
Report
System:
The UNT Digital Library
Improved Directions for the Preparation of X(OC₂H₅)₅
The following report was written to replace previous directions submitted in the February 6, 1943 report on the preparation of the solution X(OC₂H₅)₅.
Date:
April 12, 1943
Creator:
Gilman, Henry
Object Type:
Report
System:
The UNT Digital Library
Viscosities and Densities of Fluorolube Oils
Abstract: Since the viscosity-temperature relationships of fluorocarbons are somewhat unusual, when compared to hydrocarbons, for example, it was decided to measure the viscosities, at several temperatures, of various fluorolube oils. The calculation of the viscosity of a blend of oils is at best an uncertain operation, varying considerably with the method used. A comparison of various methods was indicated, in order that reasonably accurate values might be assumed for theoretical composites. The densities were measured at corresponding temperatures for use in converting viscosities, and for their value, per se.
Date:
April 28, 1943
Creator:
Haendler, H. M.; Burger, L. L.; Sheldon, Z. D. & Barber, E. J.
Object Type:
Report
System:
The UNT Digital Library
Ames Project, Chemical Research - Analytical Chemistry, Report for Period of February 1 to March 10, 1944
Technical report covering (1) analysis of uranium bromide and chloride samples, (2) the ferric-nitrate method of analyzing uranium fluorides for fluorine, (3) spectrographic determination of boron, cadmium and manganese in magnesium metal, (4) service analyses. contributions to other problems, (5) attempted preparation of uranous oxyfluoride, and (6) corrections in previous reports.
Date:
April 13, 1944
Creator:
Spedding, F. H. (Frank Harold), 1902- & Wilholm, H. A.
Object Type:
Report
System:
The UNT Digital Library
Capture of Fast Neutrons by Pb208
From abstract: "Comparison of the activity produced by fast neutrons on lead with other activations corroborates the assignment of the 3.2 hr. activity as Pb209, and the assignment of the reaction as capture of fast neutrons. Two different measurements show that the neutrons captured have energies greater than 100 KEV. This average capture cross section for primary neutrons from 7.5 MEV deuterons on a thick target of beryllium is measured as 10[^]-27 ca[^]2."
Date:
April 17, 1944
Creator:
Levinger, Joseph S., 1921-; Compton, A. H.; Allison, Samuel King, 1900-1965; Watson, W. W. & Snell, A. H.
Object Type:
Report
System:
The UNT Digital Library
Determination of Free Nitric Acid in UNH Solutions, Problem Assignment No. 208-X2A, Progress Report
Technical report abstract: Since UNH is a highly dissociated compound which ionizes to NO3 and (UO2), the latter ion being very weakly basic, a solution of pure UNH is quite acid (pH about 3). It is possible to titrate to a phenolphthalein and point with standard caustic solution and obtain a figure which represents the free acid plus the NO3 from the the UNH. However, titration of the free nitric acid alone in such a solution presents quite a problem. By precipitating and removing uranium from solution by means of potassium ferrocyanide, the residual free acid may be titrated directly by means of standard caustic using either methyl red or phenolphthalein indicators, with an error of less than 4%. A method is given to determine formic acid, should that acid be present in the mixture.
Date:
April 21, 1944
Creator:
Parlour, A. K. & Hammond, C. W.
Object Type:
Report
System:
The UNT Digital Library
The Motion of Massive Particles Through Solid Matter
Report concerning the behavior of atoms dislodged from their positions in solid constituents by neutrons during the transition from high energy to thermal energy.
Date:
April 27, 1944
Creator:
Seitz, Frederick, 1911-2008
Object Type:
Report
System:
The UNT Digital Library
Progress Report - Project 31: Vapor Phase Chlorination of TO₃
"This work is a continuation of an investigation begun in January, 1945, on a laboratory study of various methods for the chlorination of TO3. The work carried out this month deals entirely with gas phase chlorination, the liquid phase chlorination of TO3 having been turned over to Miss Hubbard. Gas phase chlorination of TO3 by means of CCl4, S2Cl2, SOCl2, SO2Cl2, and Cl2 have been carried out under varying conditions in the several different types of reactors."
Date:
April 2, 1945
Creator:
Parsons, George S.; McCabe, Charles L.; Engle, G. F. & Larson, C. B.
Object Type:
Report
System:
The UNT Digital Library
The Precipitation of Lanthanum from Solution in the Presence of Radiation
Abstract. In order to anticipate radiation - chemical effects in solutions of active lanthanum, various solutions and suspensions containing lanthanum were irradiated with an electron beam. Separation of lanthanum from barium by the alcoholic HCl method is not rendered less efficient by radiation, although considerable gas evolution occurs. Suspensions of lanthanum as hydroxide and as ferrocyanide are not appreciably solubilized by radiation. Lanthanum oxalate is decomposed by radiation, is partially thrown into solution, and finally dissolves completely when all the excess oxalate ion in the solution has been destroyed.
Date:
April 6, 1945
Creator:
Penneman, R. A. (Robert Allen), 1919-; Ghormley, J. A.; Gordon, S.; Leaf, B. & Allen, A. O. (Augustine O.)
Object Type:
Report
System:
The UNT Digital Library
The Crystal Structure of Ba3(PO4)2 and Sr3(PO4)2
From introduction: "This article gives an account of the determination of the complete crystal structures of the normal orthophosphates of barium and strontium."
Date:
April 10, 1945
Creator:
Zachariasen, William H. (William Houlder), 1906-1979
Object Type:
Report
System:
The UNT Digital Library
Separation of Tuballoy From Gunk Solutions by Sulfite Precipitation
Summary: A method is presented for the precipitation of tuballoy, apparently as a tubanyl ammonium sulfite, from gunk solutions containing the contaminants encountered in the recovery cycle. The impurities are not precipitated under the conditions employed, and their amounts in the product are reduced to values which can be attributed to occlusion. The recovery of tuballoy on one precipitation ranges from 99.5% to 99.9%.
Date:
April 18, 1945
Creator:
Ryon, A. D. & Armstrong, E. C.
Object Type:
Report
System:
The UNT Digital Library
A Solubility Method of the Determination of Non-Volatile Material in Tetrachloride Charges
Abstract: "This report suggests using methyl acetate extraction of charge material as a means of determining the non-volatile residue. It is shown that the volatile constituents of charge material are all extremely soluble in methyl acetate whereas the non-volatile materials are quite insoluble. Percent NVH on several samples of charge material by this method are reported and discussed."
Date:
April 26, 1945
Creator:
Sterett, Charles & Van Wazer, John R.
Object Type:
Report
System:
The UNT Digital Library
Unwatering and sampling of the Kirk Mine, Gilpin County, Colorado
Two parts of a report. Part I is regarding unwatering and sampling of the Kirk mine. Part II discusses the geology of kirk mine. Kirk mine is located in Gilpin County, Colorado.
Date:
April 30, 1945
Creator:
Hill, J. M.; Selfridge, G. C.; George, D. R. & Guillotte, G. B.
Object Type:
Report
System:
The UNT Digital Library
The Detection of Small Amounts of Fluorine in Large Amounts of Chlorine
Abstract: "Tests have been developed for both the qualitative detection and quantitative determination of fluorine in chlorine. The qualitative test is made by passing the gas through manganous chloride. If the pink solid tubes brown there is greater than 0.5 percent of fluorine in the gas. The quantitative test is a modification of the Steiger and Marvin Test with oxidized titanium solution."
Date:
April 1, 1946
Creator:
Lafferty, Robert H., Jr. & Winget, Rasho
Object Type:
Report
System:
The UNT Digital Library
Supplemental and Summary Report on Western Carrizo Uplift and Chuska Mountains Areas of Northern Navajo Indian Reservation Northeastern Arizona
General purpose of survey: During the period 1943 and 1944, the primary purpose was to locate, describe, sample, and generally evaluate the SOM-vanadium mineralization in the western Carrizo Uplift and Chuska Mountains Areas. To this end, the areal geology of the areas, with emphasis on the Salt Wash member of the Morrison formation, was mapped. The triangulation and the laying out of leased plots were supplemental parts of this work. The field work in 1945 was for the purpose of collecting additional and supplemental geological data in order to complete the record and to calculate the ore reserves of the areas.
Date:
April 1946
Creator:
Harshbarger, J. W.
Object Type:
Report
System:
The UNT Digital Library
Supplemental and Summary Report on Western Carrizo Uplift and Chuska Mountains Areas of Northern Navajo Indian Reservation Northeastern Arizona: [Part 2] Appendix
This report presents maps on the geology of the Western Carrizo Uplift and the Chuska Mountains of Arizona in the Northern Navajo Indian reservation.
Date:
April 1946
Creator:
Harshbarger, J. W.
Object Type:
Report
System:
The UNT Digital Library
Ohmic Characteristics of High Megohm Resistors
The following report discusses ohmic characteristics in resistors, including methods for determining the polarization characteristics of high megohm resistors that may determine the suitability of these resistors for spectrometric measurements.
Date:
April 3, 1946
Creator:
Cameron, Angus Ewan, 1906- & White, J. R.
Object Type:
Report
System:
The UNT Digital Library
The Effect of Age on the Radiosensitivity of Mice
Abstract: Mice of different ages ranging from 1.5 to 12 months have been exposed to gamma rays in an effort to determine the change in radiosensitivity with age. The dose necessary to cause 50% killing was determined for each age group and sex. No change in sensitivity with age was observed with either sex, although the experimental error in the case of the males was quite large. The females were found to be more resistant than the males.
Date:
April 8, 1946
Creator:
Curtis, H. J.; Zirkle, Raymond E. (Raymond Elliot), 1902-1988; Anderson, Ernest C., 1920-2013 & Riley, E. F.
Object Type:
Report
System:
The UNT Digital Library
The Detection of Uranium by X-ray Spectrometry
Abstract: "The possibility of detecting small quantities of uranium with an X-ray spectrometer was investigated. An X-ray spectrograph was modified by substituting a geiger counter for the photographic film. Both primary and secondary methods of excitation were studied. Radiation background of high intensity and variability limits the sensitivity of the present apparatus to 1%. Suggestions are made for increasing the sensitivity of the method."
Date:
April 9, 1946
Creator:
Saunders, B. G.; Burkhart, L. E. & Larson, C. E.
Object Type:
Report
System:
The UNT Digital Library
A Mathematical Analysis of the Calutron
Abstract: "The definitions of the fundamental measures of calutron operation including enhancement, current ratio, and process efficiency are set forth with derivations of the relationships between them. An analysis of the plant process is carried out for both the tanks limited and the charge limited case. Equations are derived for plant X output and plant X utilization efficiency. Effective production is defined and the value of increment to a mass of product material in terms of effective production is determined. An equation giving the X concentration below which product material should be reprocessed is derived."
Date:
April 12, 1946
Creator:
Leith, C. E.
Object Type:
Report
System:
The UNT Digital Library
Sid Magnet Model Test Results
From introduction: "These data were taken on a 1/16th scale model of the magnet shown on sketch no. FS-2. The object of these measurements was to get information that would determine the final design of the full scale magnet. The one main point to be settled was whether a tapered or a cylindrical pole piece would give the largest value of Hρ for a given power input into the magnet (the cylindrical pole piece is shown in dotted lines in sketch FS-2)."
Date:
April 19, 1946
Creator:
Sewell, Duane C., 1918-2008
Object Type:
Report
System:
The UNT Digital Library
Autoxidation of Uranous Salts in Water Solution
From introduction: "The fact that tetravalent uranium either in the form of solutions of its salts or, in some cases, in the dry state is readily oxidized by gaseous oxygen, has been observed by various investigators. A quantitative study of this reaction appeared to be desirable as a means of learning more about the nature of the ionic species present in uranous solutions. It was also of potential value in determining the importance of autoxidation as an undesirable side reaction involved in the handling of uranous solutions, and, if necessary, in developing procedures for minimizing the reaction."
Date:
April 20, 1946
Creator:
Nichols, Ambrose R., Jr.
Object Type:
Report
System:
The UNT Digital Library