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  • 1
    Electronic Resource
    Electronic Resource
    Photoemission from silver into liquid ammonia (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 87 (1987), S. 7242-7247 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We report here part of a detailed study of pulsed photoemission into pure liquid NH3. We find that scavengers and salts are not essential to the detection of photoelectrons in NH3, in contrast to previous measurements in H2O. A six order-of-magnitude range in the quantum yield has been found. Maximum yields are near 10−2 electrons per photon. As previous workers, we find a two-slope response to the yield curve which may be interpreted in terms of two thresholds. We interpret out observations in terms of photoinjection into a band of localized states lying below the conduction band of the NH3. The bottom of the conduction band in NH3 is found to be 0.95 eV below the vacuum. The band of localized states extends approximately 0.4 eV lower. Our analysis does not support either the ″4/2's″ or the ″5/2′s″ laws relating the yield to the excess energy above threshold.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.453368
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  • 2
    Electronic Resource
    Electronic Resource
    A model for photoinjection into polar fluids (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 84 (1986), S. 1901-1904 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The presence of fluctuating dipoles in a polar liquid has been suggested to cause an intrinsic tail of localized states extending below the conduction band edge at −V0. If such preexisting states are the final states for photoinjection into such a liquid, then they cannot be described by the conventional treatment which assumes free-particle states. In this elementary model, the effect of both free and localized final states on the Fowler theory for photoemission is determined. Well above threshold Fowler's 1/2-power law is found. The near-threshold behavior is governed by the exponential tail in the final density of states. The results compare well with recent results on photoinjection into H2O and NH3. We find V0 to lie near −0.80 eV in NH3.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.450438
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  • 3
    Electronic Resource
    Electronic Resource
    Paradromic Rings (1923)
    [s.l.] : Nature Publishing Group
    Nature 111 (1923), S. 882-882 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] PROF. C. V. BOYS, in his letter “A Puzzle Paper Band” in NATURE of June 9, p. 774, gives scant credit to the geometers. Forty years ago they described the endless band of paper with a half-turn twist in it, and found that if cut down the middle line it gave a single endless band with four ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/111882b0
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  • 4
    Electronic Resource
    Electronic Resource
    The Spirit-level as a Seismoscope (1905)
    [s.l.] : Nature Publishing Group
    Nature 72 (1905), S. 80-80 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A MISCONCEPTION seems to prevail among seismologists as to the behaviour of a spirit-level. A displacement of the bubble is regarded as conclusive evidence of the tilting of the instrument. It should be pointed out, however, that this is far from being the case. For a second cause, equally ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/072080a0
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  • 5
    Electronic Resource
    Electronic Resource
    The Hydrometer as a Seismometer (1905)
    [s.l.] : Nature Publishing Group
    Nature 72 (1905), S. 198-198 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A SHORT time ago (NATURE, May 25) I directed attention to a misconception which seemed to prevail among seismologists as to the behaviour of a spirit-level. It may perhaps be useful to point out another fallacy, also of an elementary hydro-mechanical nature, involved in some of the unsuccessful ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/072198b0
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  • 6
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    COMPASS, Deviations of the: A Graphic Method (1905)
    London : Periodicals Archive Online (PAO)
    The RUSI journal. 49 Part 1 (1905:Jan./June) 64 
    Details
    ISSN: 0307-1847
    Topics: Political Science
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:p225-1905-049-01-000005
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