Positron annihilation and internal surfaces

Huang, W.F.; Huang, D.C.
September 1993
Applied Physics Letters;9/6/1993, Vol. 63 Issue 10, p1334
Academic Journal
Measures Doppler broadened gamma spectra from positron annihilations in alumina and several zeolites. Observation of the gamma line shape parameter; Investigation of porous molecular media; Use of positron annihilation spectroscopy as a microprobe for surface studies of porous materials.


Related Articles

  • Study on the Effect of Atmosphere on A-type Zeolite Using Positron Annihilation Lifetime Technique. Mohamed, Hamdy F. M. // Egyptian Journal of Solids;2001, Vol. 24 Issue 1, p41 

    The positron annihilation lifetime has been applied to study the effect of atmosphere (air and oxygen gas) on A-type zeolite (MS-4A). The measurements were performed at 1 atm of oxygen gas and at 1 atm of air media at room temperature. The lifetime spectra were analyzed using two methods: 1)...

  • Positron Annihilation Lifetime Spectroscopy Study of the Formation of Mesoporous Materials from the Zeolite Precursor. BOSNAR, S.; BOSNAR, D.; GRŽETA, B. // Acta Physica Polonica, A.;Mar2014, Vol. 125 Issue 3, p775 

    In this work, positron annihilation lifetime spectroscopy was used for the structural characterisation of porous materials prepared from amorphous zeolite precursors acting as the starting materials and hexadecyltrimethylammonium bromide acting as a mesoporous template. The best fits of the...

  • Heterogeneous distribution of adsorbed water molecules in NaX zeolite nanopores from the data of positron spectroscopy. Bardyshev, I.; Fomkin, A. // Protection of Metals;Jul2008, Vol. 44 Issue 4, p358 

    Adsorption techniques and positron annihilation method showed that the actual distribution of adsorbed water molecules in micropores of a crystalline NaX zeolite is substantially heterogeneous. Under atmospheric conditions when the whole micropore volume is thought of as filled with water, the...

  • Structure of amorphous alumina tubes studied by positron annihilation lifetime spectroscopy. Shantarovich, V.; Kevdina, I.; Miron, N.; Baronova, Yu.; Berdonosov, S.; Baronov, S.; Melikhov, I. // Inorganic Materials;Mar2005, Vol. 41 Issue 3, p255 

    Positron annihilation lifetime spectroscopy (PALS) is used to investigate the detailed structure of amorphous alumina tubes prepared via thermohydrolysis of anhydrous AlCl3 . The results demonstrate that PALS is a sensitive probe of the structure of amorphous materials, capable of distinguishing...

  • TGRS measurements of the positron annihilation spectrum from the galactic center. Harris, M. J.; Teegarden, B. J.; Cline, T. L.; Gehrels, N.; Palmer, D. M.; Ramaty, R.; Seifert, H. // AIP Conference Proceedings;2000, Vol. 510 Issue 1, p31 

    The TGRS experiment on board the Wind spacecraft includes a Ge detector with very high resolution (3–4 keV FWHM) at energies around 511 keV. To take advantage of WIND’s fixed pointing at the south ecliptic pole and its 3 s rotation, TGRS also includes a Pb occulter fixed on the...

  • Investigations of positron annihilation radiation. Milne, P. A.; Kurfess, J. D.; Kinzer, R. L.; Leising, M. D.; Dixon, D. D. // AIP Conference Proceedings;2000, Vol. 510 Issue 1, p21 

    By combining OSSE, SMM and TGRS observations of the galactic center region, Purcell et al. (1997) and Cheng et al. (1997) produced the first maps of galactic positron annihilation. That data-set has been augmented with additional data, both recent and archival, and re-analyzed to improve the...

  • Development of Hydrocracking Catalyst Support from Kaolin of Indonesian Origin. Rahayu, Endang Sri; Samadhi, Tjokorde Walmiki; Subagjo; Gunawan, Melia Laniwati // Advanced Materials Research;2014, Issue 896, p532 

    The global shift of petroleum refinery towards heavier crude oils means an increasing demand of hydrocracking catalysts. This work studies the conversion of a kaolin originating from the Bangka island in Indonesia into a hydrocracking catalyst support consisting of zeolite-Y and amorphous...

  • Immobilization of tritium-containing oil wastes by their incorporation in a cement matrix. Sazonov, A. B.; Aleshina, A. V.; Magomedbekov, E. P. // Radiochemistry;Aug2009, Vol. 51 Issue 4, p412 

    Tritium leaching from cement-based composites incorporating spent tritium-containing oil sorbed on zeolites, active alumina, or activated carbon was studied. Activated carbon is a preferable sorbent compared to the other examined materials, and with this sorbent the rate and degree of tritium...

  • Preparation and Characterization of Zeolite Membrane for Bioethanol Purification. Purbasari, Aprilina; Istirokhatun, Titik; Devi, Ariestya Meta; Mahsunnah, Lulluil; Susanto, Heru // Bulletin of Chemical Reaction Engineering & Catalysis;Jun2013, Vol. 8 Issue 1, p47 

    The use of bioethanol as an alternative fuel with a purity of more than 99.5% wt has prompted research on bioethanol purification. One of the promising methods used for bioethanol purification is pervaporation. This research is aimed to prepare and characterize zeolite membranes for...


Read the Article


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

Try another library?
Sign out of this library

Other Topics