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319,268 Matching Results
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The Design of a Mediumenergy Pion Beam (4-16 Gev/C) for the Brookhaven A. G. S.
None
Date:
January 1, 0196
Creator:
Read, A. L. & Rubinstein, R.
Object Type:
Report
System:
The UNT Digital Library
Removal of Radioisotopes From Solution by Earth Materials From Eastern Idaho
None
Date:
January 1, 0196
Creator:
Wilding, M. W. & Rhodes, D. W.
Object Type:
Article
System:
The UNT Digital Library
Two-Phase Flow Through Apertures
None
Date:
January 1, 0196
Creator:
Isbin, H. S.
Object Type:
Report
System:
The UNT Digital Library
PAR Loop Schedule Review
The schedule for the installation of the PAR slurry loop experiment in the South Facility of the ORR has been reviewed and revised. The design, fabrication, and installation is approximately two weeks behind schedule at this time due to many factors; however, indications are that this time can be made up. Design is estimated to be 56 per cent complete, fabrication 27 per cent complete-and installation 11 per cent complete:
Date:
March 31, 0958
Creator:
Schaffer, Jr. & W.F.
Object Type:
Report
System:
The UNT Digital Library
Three-dimensional Numerical Investigation of Electron Transport with Rotating Spoke in a Cylindrical Anode Layer Hall Plasma Accelerator
The oscillation behavior described in [Tang et. al, Phys. Plasmas 19, 073519 (2012)] di ers too greatly from previous experimental and numerical studies to claim observation of the same phenomenon. Most signi cantly, the rotation velocity in [Tang et. al, Phys. Plasmas 19, 073519 (2012)] is three orders of magnitude larger than that of typical \rotating spoke" phenomena. Several physical and numerical considerations are presented to more accurately understand the numerical results of [Tang et. al, Phys. Plasmas 19, 073519 (2012)] in light of previous studies.
Date:
August 27, 1012
Creator:
Ellison, C. Leland; Matyash, K.; Parker, J. B.; Raitses, Y. & Fisch, N. J.
Object Type:
Report
System:
The UNT Digital Library
Fabrication Cots for Plutonium Fuel Elements Part A: Variable Costs of Fabrication UO2-PuO2 Fuel Rods for the Plutonium Recycle Critical Facility
None
Date:
September 1, 1695
Creator:
Bloomster, C. H.
Object Type:
Report
System:
The UNT Digital Library
Vapor pressure of various compounds at low temperatures
None
Date:
January 1, 1916
Creator:
Burrell, G. A. & Robertson, I. W.
Object Type:
Report
System:
The UNT Digital Library
Methods of shutting off water in oil and gas wells
None
Date:
January 1, 1918
Creator:
Tough, F. B.
Object Type:
Report
System:
The UNT Digital Library
Engineering report on the Smackover oil and gas field, Union and Ouachita Counties, Arkansas. [Underground conditions and their application to drilling and production problems]
None
Date:
August 1, 1924
Creator:
Haury, P. S. & Kelly, R. B.
Object Type:
Report
System:
The UNT Digital Library
CORROSION OF THORIUM AND RELATED MATERIALS
None
Date:
January 1, 1940
Creator:
Feibig, J. G.
Object Type:
Report
System:
The UNT Digital Library
THE RECOVERY OF URANIUM FROM BYPRODUCT SCRAP MATERIALS
None
Date:
January 1, 1940
Creator:
Spiegler, L.
Object Type:
Report
System:
The UNT Digital Library
The Precipitation of Uranium Peroxide in the Presence of Fluorides
The large-scale recovery of uranium from materials which also contained great quantities of fluorides did not give a product which had a low enough fluoride content to be treated satisfactorily by the other extraction process. The objective of the investigations carried out in this laboratory was a method of reducing the amount of fluoride which accompanied the uranium. The material from which the uranium was recovered in the industrial process was a slag containing (in addition to uranium) magnesium fluoride, calcium and dolomitic lines, crucible dross, and other waste products from the reaction of magnesium metal and uranium hexafluoride. Most of the fluoride was removed from this mixture by heating the roasted and ground slag with sulfuric acid. The residue was mixed with water and much of the caclium sulfate and fluoride, magnesium fluoride, and hydrated ferric oxide and alumina was precipitated by reducing the acidity. After filtering off the precipitate, ammonium sulfate was added to the solution and uranium peroxide (UO{sub 4} {center_dot} 2H{sub 2}O) was precipitated by addition of hydrogen peroxide. The pH of the solution was maintained between 3.0 and 3.5 during the precipitation by addition of sodium hydroxide. The uranium peroxide, even after washing, contained between …
Date:
January 1, 1941
Creator:
King, Edward J.
Object Type:
Report
System:
The UNT Digital Library
A New Crystalline Hydrate of Uranium Tetrafluoride, 2UF$sub 4$/center dot/ 5H$sub 2$O, and Its Dehydration to Anhydrous Uranium Tetrafluoride
None
Date:
March 1, 1941
Creator:
Grosse, A. V.
Object Type:
Report
System:
The UNT Digital Library
Production of DsSub 2$O for Use in the Fission of Uranium
Brief discussions of experimental methods, kinetics, and the catalysts used in the production of D{sub 2}O are presented (J.E.D.)
Date:
June 23, 1941
Creator:
Urey, H. C.; Grosse, A. V. & Walden, G.
Object Type:
Report
System:
The UNT Digital Library
Chemical Properties of Uranium Hexafluoride, UF6
Uranium hexafluoride has the distinction of being the only stable gaseous compound of uranium known up to the present moment. Because of this property it is the only compound that can be used for processes of isotope separation, such as diffusion, thermal diffusion, centrifuge separation, distillation, and other of a similar nature. Here is a short description of the properties of UF{sub 6} and is intended for a reader interested only casually in this compound. UF{sub 6} is a very reactive compound and a very strong fluorinating agent. It is immediately hydrolized by water. In fluorinating reactions it is reduced to the green highly stable UF{sub 4}. It reacts instantaneously with hydrogen at room temperature. It fluorinates many metals; sodium and mercury are attacked in the cold, lead, zinc, tin and iron on heating; platinum and gold react only above 400 C. With organic compounds like alcohol, ether, benzene or toluene, immediate fluorination takes place with formation of HF and carbon or carbonaceous material. The compound forms colorless, very volatile, beautiful transparent crystals of high refractive index. Melting point = 69.5{sup o}; boiling point at 760 mm = 56.2{sup o}; D20{sup o} = 4.68. The crystals melt water pressure to …
Date:
June 25, 1941
Creator:
Grosse, Aristid V.
Object Type:
Report
System:
The UNT Digital Library
Search for Elements 94 and 93 in Nature. Presence of 94$sup 239$ in Pitchblende
None
Date:
April 13, 1942
Creator:
Seaborg, G. T. & Perlman, M. L.
Object Type:
Report
System:
The UNT Digital Library
Purification of Uranium Oxide
None
Date:
April 21, 1942
Creator:
Hoffman, J.I.
Object Type:
Report
System:
The UNT Digital Library
Formation of the 50-Year Element 94 from Deuteron Bombardment of U$sup 23$$sup 8$
None
Date:
June 1, 1942
Creator:
Kennedy, J.W.; Perlman, M.L.; Segre, E. & Wahl, A.C.
Object Type:
Report
System:
The UNT Digital Library
Establishing Site X: Letter, Arthur H. Compton to Enrico Fermi, September 14, 1942
This letter from Compton to Fermi describes developments bearing on the establishment of ``site X`` (which, as of the letter date, is definitely determined as at the Tennessee Valley) for the construction of a pile and associated pilot plant buildings, describes the situation as of the letter date, and offers counsel as to how to proceed.
Date:
September 14, 1942
Creator:
Compton, A. H.
Object Type:
Report
System:
The UNT Digital Library
Progress Report on Contract OEMsr-290. Supplement 2
None
Date:
October 1, 1942
Creator:
Kraus, C. A.
Object Type:
Report
System:
The UNT Digital Library
Theory of High Frequency Rectification by Silicon Crystals
The excellent performance of British ''red dot'' crystals is explained as due to the knife edge contact against a polished surface. High frequency rectification depends critically on the capacity of the rectifying boundary layer of the crystal. C. For high conversion efficiency, the product of this capacity and of the ''forward'' (bulk) resistance R{sub b} of the crystal must be small. For a knife edge, this product depends primarily on the breadth of the knife edge and very little upon its length. The contact can therefore have a rather large area which prevents burn-out. For a wavelength of 10 cm. the computations show that the breadth of the knife edge should be less than about 10{sup -3} cm. For a point contact the radius must be less than 1.5 x 10{sup -3} cm. and the resulting small area is conductive to burn-out. The effect of ''tapping'' is probably to reduce the area of contact.
Date:
October 29, 1942
Creator:
Bethe, H. A.
Object Type:
Report
System:
The UNT Digital Library
[Study of Factors Which Influence the Rate of Reaction Between UO3 CCl4. Progress Report]
None
Date:
December 15, 1942
Creator:
Kraus, C. A.
Object Type:
Report
System:
The UNT Digital Library
The Production of Uranium Metal by Metal Hydrides Incorporated
Metal Hydrides Incorporated was a pioneer in the production of uranium metal on a commercial scale and supplied it to all the laboratories interested in the original research, before other methods for its production were developed. Metal Hydrides Inc. supplied the major part of the metal for the construction of the first experimental pile which, on December 2, 1942, demonstrated the feasibility of the self-sustaining chain reaction and the release of atomic energy.
Date:
January 1, 1943
Creator:
Alexander, P. P.
Object Type:
Report
System:
The UNT Digital Library
Retention basins---Building 107, 100 Areas
None
Date:
January 23, 1943
Creator:
Lauder, D. H. & Gross, C. N.
Object Type:
Report
System:
The UNT Digital Library