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2 edition of Two investigations on helium at low temperatures. found in the catalog.

Two investigations on helium at low temperatures.

Henri Hein Tjerkstra

Two investigations on helium at low temperatures.

by Henri Hein Tjerkstra

  • 238 Want to read
  • 27 Currently reading

Published in Scheveningen .
Written in English

    Subjects:
  • Helium.,
  • Low temperature research.

  • Classifications
    LC ClassificationsQD181.H4 T5
    The Physical Object
    Pagination49, [1] p.
    Number of Pages49
    ID Numbers
    Open LibraryOL6208948M
    LC Control Number56032478
    OCLC/WorldCa12823968

      Based on helium properties in this condition e.g., at low temperatures and high pressures, the liquefaction of helium decreased due to the throttling process. Increasing the stages from 2 to 3 enhance the level of liquefaction by 2%, while increasing the stages from 3 to 4 enhance the liquefaction by % at the cycle optimal : Morteza Ardeshir Larijani, Mahdi Eslami, Hossein Afshin. ofpressure,volume,temperature,enthalpyandentropyforpressures up to atmospheres, specific volumes from 5to liters per kilo- gram andtemperatures from K to Z0K.

    Superfluidity was originally discovered in liquid helium by Pyotr Kapitsa and John F. has since been described through phenomenology and microscopic theories. In liquid helium-4, the superfluidity occurs at far higher temperatures than it does in heliumEach atom of helium-4 is a boson particle, by virtue of its integer spin.A helium-3 atom is a fermion particle; it can form bosons. Investigations On Liquid Helium Top results of your surfing Investigations On Liquid Helium Start Download Portable Document Format (PDF) and E-books (Electronic Books) Free Online Rating News / is books that can provide inspiration, insight, knowledge to the reader.

    The PAS investigations revealed a clear difference between the He implantation effects in Fe and EUROFER 97 at K. For both materials the mean positron lifetimes increased with He dose in the range 1 – appm, although the increase was stronger for Fe than for EUROFER 97 and for both materials smaller for implantation at K than at by: 4. @article{osti_, title = {Detection of significant differences between absorption spectra of neutral helium and low temperature photoionized helium plasmas}, author = {Bartnik, A. and Wachulak, P. and Fiedorowicz, H. and Fok, T. and Jarocki, R. and Szczurek, M.}, abstractNote = {In this work, spectral investigations of photoionized He plasmas were performed.


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Two investigations on helium at low temperatures by Henri Hein Tjerkstra Download PDF EPUB FB2

Adsorption isotherms of helium have been measured on two adsorbents, jewellers rouge and steel, the temperatures ranging from °K to °K. The isot Cited by: TWO OFFPRINTS: 1) LOW TEMPERATURE INVESTIGATIONS.

2) LIQUID HYDROGEN CALORIMETRY. [James. DEWAR] on *FREE* shipping on qualifying : James. DEWAR. Investigations into the properties of substances at low temperatures, which have led, amongst other things, to the preparation of liquid helium.

HEIKE KAMERLINGH ONNES. Investigations into the properties of substances at low temperatures, which have led, amongst other things, to the preparation of liquid helium. at low temperatures in continuation of the previous investigations already carried out at Leiden+. It falls naturally into two parts, the first dealing with measurements of the susceptibilities of powdered substances and the second in which measurements on crystals are described.

It was decided to investigate the following series of com. Because helium diffusion at temperatures over is very rapid in a geologic sense, a cooling apatite will retain no memory of the high temperature diffusion mechanism, and so it is of no significance to low temperature thermochronometry.

roetric Implications A helium closure temperature of just 75 is far lower than that reported for any other dating technique, and has important implications for Cited by: Reprinted from: "Compressibility Factor for Helium", Data Sheet in A Compendium of the Properties of Materials at Low Temperature (Pnese 11) by the National Bureau of Standards, Cryogenic Engineering Laboratory, R.

Stewart and V. Johnson. On the change of electric resistance of pure metals at very low temperature etc. The resistance of pure mercury at helium temperatures.

Leiden: Eduard Ijdo, First printing of the first announcement of the discovery of superconductivity, the disappearance of electrical resistance in certain materials at very low temperatures.

Purchase Proceedings of the Ninth International Cryogenic Engineering Conference, Kobe, Japan, May - 1st Edition.

Print Book & E-Book Book Edition: 1. Basics of Low-temperature Refrigeration A. Alekseev 1. Linde AG, Munich, Germany. Abstract. This chapter gives an overview of the principles of low temperature refrigeration and the thermodynamics behind it.

Basic cryogenic processes - Joule-Thomoson process, Brayton process as well as Claude process are - described and Size: 2MB. Chapter E2: Borehole geophysics applied to ground-water investigations, by W.S. Keys: USGS—TWRI Book 2, Chapter E2. Chapter F1: Application of drilling, coring and sampling techniques to test holes and wells, by Eugene Shuter and W.E.

Teasdale: USGS—TWRI Book 2, Chapter F1. Book 3: Applications of Hydraulics. At temperatures substantially below the phase-boundary temperatures, the ordered liquid might revert smoothly into a modification of anomalous thermal behavior, i.e.

The temperature-dependant thermophysical properties of pure argon [27, 38], pure helium and argon-helium mixtures at equilibrium [38][39][40], and the volume radiation heat loss (S R) [27] are. The institute is world famous for research in low temperature physics.

This is a collection of six articles on the basic achievements of the Institute during the last few years. They include the discoveries of crystallization waves in helium and quantum magnetic breakdown. A LN 2 /LHe cryostat equipped with 80 K and 4 K radiation shields and a needle valve for vapor helium cooling was used to provide a K low temperature environment.

Heike Kamerlingh Onnes and Jacob Clay reinvestigated Dewar's earlier experiments on the reduction of resistance at low temperatures. Onnes began the investigations with platinum and gold, replacing these later with mercury (a more readily refinable material).

All peaks of helium release can be divided into three groups: low temperature (below K), middle temperature (– K) and high temperature (above K). Desorption at low temperature is mainly attributed to helium at interstitial sites and surface sites, where helium does not need much energy to overcome the looser binding.

This time around, much of the demand has to do with helium's ability to liquefy at very low temperatures — just degrees Kelvin (− F). Investigations on the adsorption of helium at very low temperatures. Physica16 (4), DOI: /(50) Earl A.

Long, Lothar Meyer. Anomalous Adsorption of Helium at Liquid Helium Temperatures. Physical Review76 (3), DOI: /PhysRevCited by: Density, ρ, has units typically [kg/m3] or [lb/ft3], and is defined by the ratio of the mass to the volume of a substance. ρ = m/V [1] where m = mass, units typically [kg] or [lb] V = volume, units typically [m 3] or [ft 3].

Specific weight, γ, has units typically [N/m 3] or [lb f /ft 3] is defined by the ratio of the weight to the volume of a substance. Investigation of the properties of helium-4 at low temperatures A. Gorshkov Chemical and Petroleum Engineering vol pages – () Cite this articleAuthor: A.

Gorshkov. consequence of the ability to reach liquid-helium temperatures. Of course, it’s roughly known when the first two super-conductivity experiments were carried out.

Kamerlingh Onnes’s two earliest reports to the KNAW about zero resis - tance and “supraconductivity,” as .At higher temperatures, helium will solidify with sufficient pressure.

At room temperature, this requires aboutatm. Helium I. Below its boiling point of kelvins and above the lambda point of kelvins, the isotope helium-4 exists in a normal colorless liquid state, called helium : group 18 (noble gases).COVID Resources.

Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.