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The Low Energy Photodisintegration of 3H and 3He and Neutron-Deuteron Scattering

Description: The cross sections for electric dipole photodisintegration of H/sup 3/ and He/sup 3/ at low energies are expressed in terms of the effective range parameters of the doublet n-d scattering matrix. Agreement with the experimental results is possible for either set of n-d scattering lengths.
Date: 1959
Creator: Delves, L. M.
Partner: UNT Libraries Government Documents Department
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The Adsorption of He3 and He4 on Activated Charcoal

Description: The adsorption on activated charcoal of pure He3 at 2.5 and 3°K, and of pure He4 at 4°K has been measured. The volume of gas necessary to form a monolayer is approximately the same for the two isotopes. It is shown that capillary condensation does not occur in this adsorbent at low saturations. The data have been analyzed by a number of methods with consistent results.
Date: 1956
Creator: Hoffman, C. J.; Edeskuty, F. J. & Hammel, Edward F. (Edward Frederick), 1918-
Partner: UNT Libraries Government Documents Department
captions transcript

[News Clip: Blimp]

Description: Video footage from the WBAP-TV station in Fort Worth, Texas to accompany a news story about a Navy blimp stopping at the Dallas Naval Air Station en route to the West Coast.
Date: May 6, 1955
Duration: 1 minute 11 seconds
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections
captions transcript

[News Clip: News briefs - balloon]

Description: Video footage from the WBAP-TV station in Fort Worth, Texas to accompany a news story about General Mills releasing 75 balloons shaped like flour sacks to celebrate their 75th anniversary.
Date: January 13, 1955
Duration: 1 minute 07 seconds
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections
open access

Heat Transfer Calculations for CO2 Gas-Cooled Loop-PRTR

Description: At the request of Design Development Operation, various heat transfer and fluid flow problems were examined which are peculiar to the CO2 Gas-Cooled Loop in the PRTR. The results of these calculations are desired primarily to aid in demonstrating the adequacy of the design proposal. In addition, the operational limits of the loop and the consequences of the gas loop installation on the PRT reactor are of interest.
Date: August 4, 1959
Creator: Muraoka, J.
Partner: UNT Libraries Government Documents Department
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80" Bubble Chamber Expansion System Summary of Piston Motion Studies

Description: Prior to assembly into the 80" bubble chamber, the expansion system was subjected to a series of tests to check piston dynamics and gain information on the reliability of the various components. Furthermore, the rest provided operating personnel with the opportunity to become familiar with the operation and maintenance of the expansion system. Two separate tests were performed with the apparatus that was located at the north end of the AGS experimental area; one during the week of Oct. 15 and t… more
Date: January 7, 1964
Creator: Goodzeit, C. L.
Partner: UNT Libraries Government Documents Department
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Towards Increased Precision of the 4He:23P1→23P2 Transition Measurement Using Laser Spectroscopy

Description: Significant sub-systems were created and others enhanced providing a platform for an order of magnitude precision increase of the small 4He interval - 23P1→23P2 laser spectroscopy measurement, as well as other helium transitions. These measurements serve as tests of helium theory and quantum electro-dynamics in general. Many improvements to the original experiment are discussed and characterized. In particular, counting speed increased 10x, the signal level was doubled, a novel Doppler shift mi… more
Date: December 2021
Creator: Cameron, Garnet
Partner: UNT Libraries
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Theory of Superfluidity and Critical Velocity in Helium II

Description: The theory of superfluidity of helium II doesn't cover one important phenomenon--the existence of a critical velocity for which the theory is not able to explain quantitatively. This paper looks to conduct experiments on the need for substantial alterations of the helium II theory.
Date: unknown
Creator: Ginzburg, V. L. (Vitaliĭ Lazarevich), 1916-2009
Partner: UNT Libraries Government Documents Department
open access

Some Properties of He-3 Solution in He-4

Description: The authors give the results of their work towards the development of effective methods for enrichment in light isotopes.
Date: unknown
Creator: Eselʹson, B. N. (Boris Naumovich) & Lazarev, B. G. (Boris Georgievich), 1906-
Partner: UNT Libraries Government Documents Department
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Obtaining Temperatures Below 1° K by Pumping Vapor Over Liquid Helium

Description: To obtain a temperature less than 1°K and to conduct the research at these temperatures at present is connected with significant difficulties. Though the magnetic method of Debye and Gistique can reach very low temperature, it posses an inadequate range, which makes desirable the use for research, requiring uniformity of temperature in the course of long measurements, of the method of pumping vapor over liquid helium.
Date: unknown
Creator: Esselson, B. N.
Partner: UNT Libraries Government Documents Department
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Influence of Extraneous Particles on the Thermodynamic Relations and the Speed of Second Sound in Helium II

Description: Extraneous particles, contained in Helium II, come into its normal part. Since the normal part of helium II, bound with phonons and rotons, quickly diminishes with decreasing temperature, and the contributions of the extraneous particles in the normal part, with decreasing temperatures does not decrease (but further increases).
Date: unknown
Creator: Pomeranchuk, I. (Isaak), 1913-1966
Partner: UNT Libraries Government Documents Department
open access

Purification of Argon, Helium and Xenon : a Bibliography

Description: This bibliography contains 145 references on the technology and apparatus used in the purification of argon, helium and xenon, and on the analysis for water, carbon monoxide, hydrogen, nitrogen, and oxygen, in the purification process. The references are arranged in four classifications: general, argon, helium, and xenon. Within each classification, the references are arranged in chronological order.
Date: September 16, 1956
Creator: Cernak, Elizabeth A.
Partner: UNT Libraries Government Documents Department
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The Solubility of Helium in Tuballoy

Description: This technical report summarizes the work done in attempting to determine the solubility of helium in tuballoy. In general, the method used has been to allow the tuballoy to stand in contact with helium at one atmosphere presume at a fixed temperature for an extended period, then to pump off the excess helium to a low pressure in as short a time as possible (10-6 mm of Hg or less). The system was then closed off and the pressure increase was measured by a suitable gauge as a function of time.… more
Date: June 26, 1945
Creator: Seltz , H. & Young, C. W.
Partner: UNT Libraries Government Documents Department
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Helium Researches VIII : a Method of Quantitative Measurement of Small Amounts of Helium

Description: A method of gas measurement in the volume range 10(-4) - 10(-8)cc utilizing Töpler gas transport and Pirani-Stern hot-wire manometer principles is described. Sources of error are discussed and methods of avoiding them are given.
Date: 1963
Creator: Paneth, F.; Urry, Wm. D. & Kairaitis, D.
Partner: UNT Libraries Government Documents Department
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A Monitor for the Continuous Determination of Deuterium

Description: Details are given of a monitor for the continuous determination of deuterium in helium. Excess oxygen is added to the gas stream and the oxygen concentration determined before and after passage of the gas through a deuterium-oxygen recombination unit. Oxygen concentrations are measured with galvanic cells. The accuracy is better and +- 10 percent in the range 200 - 5000 v.p.m. deuterium. operating instructions for the Lucas Heights equipment are given.
Date: December 1962
Creator: Morgan, R. R. T.
Partner: UNT Libraries Government Documents Department
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Investigation of Specialized Laser and Optical Techniques to Improve Precision Atomic Spectroscopy of Helium

Description: The aim of this thesis is to develop both Yb and Tm fiber laser sources with all fiber cavities. Both wavelength ranges provide useful laser sources for optical pumping of helium. The goal is to develop Tm laser sources operating at 2058 nm to optically quench 3He (2058.63 nm) and 4He (2058.69 nm) singlets (21S0). We also have developed Yb laser sources at 1083 nm to optical pump the triplet states of helium and laser cool an atomic beam of helium.
Date: May 2020
Creator: Currey, Ronnie
Partner: UNT Libraries
open access

The Air-Launched Balloon System (ALBS) Development Program, Phase 2

Description: Abstract: The circumstances leading to the second phase of the Air-Launched Balloon System Development Program are described, along with the governing design constraints. Individual component development efforts and system design modifications are described in turn: the procurement and testing of the new dewar, the qualification of the updated cryogenic unit recovery system. The complicated command, control, and telemetry subsystem is also described in detail. The results of component tests and… more
Date: December 15, 1981
Creator: Carten, Andrew S., Jr.
Partner: UNT Libraries Government Documents Department
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The Reaction Between Hydrogen and Oxygen by Catalysis and the Thermal Reaction

Description: From abstract: "The reaction between hydrogen and oxygen with the aid of various catalysts (especially platinum on aluminua) has been studied, and the operating variables such as flow rates, space velocity, temperature, and gas composition have been examined rather extensively. It has been found that hydrogen and oxygen in stoichiometric proportions and mixed with either steam or helium may be made to react to the extent of 99.5% or greater at space velocities up to 30,000 hr-1, or even higher,… more
Date: January 15, 1952
Creator: Kuhn, D. W.; Ryon, A. D.; Palko, A. A. & Clewett, G. H.
Partner: UNT Libraries Government Documents Department
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Telemetry component tests in the FN tandem terminal

Description: When an electrostatic tandem accelerator is used primarily for heavy ion acceleration, numerous communication channels with the high voltage terminal are desirable. The ANL FN tandem operates at a tank pressure of 100 psi SF/sub 6/ at terminal voltages up to 9.5 MeV. A low powered He-Ne laser with 15 percent modulation has been successfully tested in the terminal under normal operating conditions. Such a system allows the transmission of information without the use of light guides. Multistrande… more
Date: January 1, 1977
Creator: Bicek, J. J.; Billquis, P. J. & Yntema, J. L.
Partner: UNT Libraries Government Documents Department
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Advanced NMR-based techniques for pore structure analysis of coal

Description: One of the main problems in coal utilization is the inability to properly characterize its complex pore structure. Coals typically have micro/ultra-micro pores but they also exhibit meso and macroporosity. We believe that measurement of the NMR parameters of various gas phase and adsorbed phase NMR active probes can provide the resolution to this problem. We will investigate the dependence of the common NMR parameters such as chemical shifts and relaxation times of several different nuclei and … more
Date: January 1, 1992
Creator: Smith, D. M.
Partner: UNT Libraries Government Documents Department
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