The quantitative characterization of liquid and solid surfaces with metastable helium atoms

Morgner, H.
February 2000
AIP Conference Proceedings;2000, Vol. 500 Issue 1, p687
Academic Journal
The electron spectroscopy based on the excitation energy of metastable rare gas atoms is a valuable tool for surface analysis because its surface sensitivity does not depend on the limited mean free path of the emitted electrons in condensed matter, but is perfect due to the physics of the emission process. Up to recently, the application of the method has suffered from the fact that a quantitative evaluation of the measured spectra has not been possible. The present contribution describes some progress in this respect which has been made during the last few years. © 2000 American Institute of Physics.


Related Articles

  • Study of two-body and three-body channels for the reaction of metastable helium atoms with selected atomic and molecular species. Pouvesle, J. M.; Khacef, A.; Stevefelt, J.; Jahani, H.; Gylys, V. T.; Collins, C. B. // Journal of Chemical Physics;3/1/1988, Vol. 88 Issue 5, p3061 

    This work reports the measurements of rate coefficients for excitation transfer reactions of metastable He(2 3S) atoms, produced in 0.3–4 atm of helium, with various reactants presenting a wide range of characteristics. In all cases studied, three-body reaction channels were identified...

  • Potential energy curves and transport properties for the interaction of He with other ground-state atoms. Partridge, Harry; Stallcop, James R.; Levin, Eugene // Journal of Chemical Physics;10/8/2001, Vol. 115 Issue 14 

    The interactions of a He atom with a heavier atom are examined for 26 different elements, which are consecutive members selected from three rows (Li–Ne, Na–Ar, and K,Ca, Ga–Kr) and column 12 (Zn, Cd) of the Periodic Table. Interaction energies are determined using...

  • Vibrational excitation in He+(Hsub 2]O)[sub 11] collisions: Quantum calculations and experiment. Brudermann, J.; Buck, U.; Fredj, E.; Gerber, R.B.; Ratner, M.A. // Journal of Chemical Physics;12/8/1999, Vol. 111 Issue 22, p10069 

    Studies the vibrational excitation in helium atoms scattered from a beam of water clusters. Elastic scattering, rotationally inelastic scattering of monomers and vibrational excitation of the clusters; Use of quantum calculations; Shearing modes of the outer and middle rings.

  • Role of dielectric screening in atom–surface interactions. Schwartz, Carey // Journal of Chemical Physics;7/1/1985, Vol. 83 Issue 1, p437 

    The effect of dielectric screening of a substrate by an overlayer is calculated. Both the overlayer and substrate are modeled as dielectric continua which are then treated by linearized hydrodynamics. The effect of dielectric screening is a shift of the plane to which the total van der Waals...

  • Localization of helium around microscopic impurities in liquid helium. Gordon, E. B.; Shestakov, A. F. // Low Temperature Physics;Jan2000, Vol. 26 Issue 1 

    The structure and properties of the environment of impurity atoms Im immersed in liquid helium are examined. It is demonstrated that there are two qualitatively different types of structure of the layer of helium atoms nearest to Im: structures characterized by attraction and repulsion. In the...

  • Micrometer-sized nozzles and skimmers for the production of supersonic He atom beams. Braun, J.; Day, P.K.; Toennies, J.P.; Witte, G. // Review of Scientific Instruments;Aug1997, Vol. 68 Issue 8, p3001 

    Describes micrometer-sized nozzles and skimmers made from drawn glass tubes and their production of highly monoenergetic helium atom beams. Measured speed ratios of the intense beams provided by the glass nozzles; Reduction of the size of helium-atom surface-scattering time-of-flight...

  • Magneto-optical trap of metastable helium-3 atoms. Kumakura, M.; Morita, N. // Applied Physics B: Lasers & Optics;2000, Vol. 70 Issue 4, p555 

    Abstract. A magneto-optical trap of metastable [sup 3]He atoms has been demonstrated. Some 10[sup 5] atoms have been confined in a region with a diameter of m 0.4 mm at a temperature of is approximately equal to 0.5 mK; the atomic number density is estimated to be 10[sup 9]/cm[sup 3] at the trap...

  • Paired-up helium atoms make it big. Brumfiel, Geoff // Nature;8/21/2003, Vol. 424 Issue 6951, p865 

    Reports that researchers have coaxed helium atoms together to create a super sized molecules in Paris, France. Features of helium gas; Procedures applied by researchers to create molecules; Quantum behavior of helium atoms.

  • Study of two-body and three-body channels for the reaction of metastable helium atoms with nitrogen. Pouvesle, J. M.; Stevefelt, J.; Collins, C. B. // Journal of Chemical Physics;3/1/1985, Vol. 82 Issue 5, p2274 

    This work reports the characterization of late time periods in the decay of metastable He(2 3S) atoms produced in 1–4 atm of helium containing up to 1400 mTorr of N2. Results have been obtained that exploit the large dynamic range and high data acquisition rates available from time...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics