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  • 1
    Online Resource
    Online Resource
    X-Ray Yield and Line/Background Ratios for Electron Excitation
    AIP Publishing ; 1965
    In:  Journal of Applied Physics Vol. 36, No. 3 ( 1965-03-01), p. 699-702
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 36, No. 3 ( 1965-03-01), p. 699-702
    Abstract: X-ray yield in photons/sr/electron was measured for the Kα lines of Ti, Cr, Mn, Fe, Cu, Zn, Ge, Zr, and the Lα lines of Ta and Au. Incident electron energy was varied from 11 to 38 keV, and for some elements the take-off angle for emerging x rays was varied from 6 to 45 deg. Theoretical yield values calculated after the method of Metchnik and Tomlin showed an average deviation of about 30% from the measured values, a very satisfactory agreement. Line/background ratios were also measured for the same elements and conditions. Normalization to the natural x-ray line breadths gave ratios between 100/1 and 26 000/1 depending on the element and experimental conditions. Line/background ratios are consistently larger at low take-off angles indicating that the characteristic radiation must be generated relatively closer to the surface than the continuum of the same wavelength.
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/1.1714204
    Language: English
    Publisher: AIP Publishing
    Publication Date: 1965
    detail.hit.zdb_id: 220641-9
    detail.hit.zdb_id: 3112-4
    detail.hit.zdb_id: 1476463-5
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  • 2
    Online Resource
    Online Resource
    The APS Amendment on Professional Responsibility
    AIP Publishing ; 1972
    In:  Physics Today Vol. 25, No. 11 ( 1972-11-01), p. 42-49
    Details
    In: Physics Today, AIP Publishing, Vol. 25, No. 11 ( 1972-11-01), p. 42-49
    Abstract: On behalf of 276 members of The American Physical Society, I have introduced the amendment to the APS constitution described in the January issue of the Bulletin of that Society. I urge the membership of APS to give this amendment their most careful consideration.
    Type of Medium: Online Resource
    ISSN: 0031-9228 , 1945-0699
    URL: Article
    DOI: 10.1063/1.3071092
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 1972
    detail.hit.zdb_id: 2031187-4
    detail.hit.zdb_id: 208863-0
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  • 3
    Online Resource
    Online Resource
    Excitation of Characteristic X Rays by Protons, Electrons, and Primary X Rays
    AIP Publishing ; 1964
    In:  Journal of Applied Physics Vol. 35, No. 9 ( 1964-09-01), p. 2578-2581
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 35, No. 9 ( 1964-09-01), p. 2578-2581
    Abstract: Protons, electrons, and primary x rays were used to excite characteristic x radiation from individual specimens of Ti, Cr, Fe, Cu, Ge, Zr, and Au. X-ray yield expressed as (photons /sr)/ quantum increased with quantum energy in a similar manner for protons in the range about 1 MeV and electrons in the range about 50 keV. For primary x-ray excitation, the yield decreased with increasing quantum energy, a relationship opposite to that for proton or electron excitation. It appears that the relative values of photo-electric absorption and scattering must be quite different for x rays and electrons to account for their opposite relationship of yield vs energy.
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/1.1713803
    Language: English
    Publisher: AIP Publishing
    Publication Date: 1964
    detail.hit.zdb_id: 220641-9
    detail.hit.zdb_id: 3112-4
    detail.hit.zdb_id: 1476463-5
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  • 4
    Online Resource
    Online Resource
    Electron Probe Intensity Calculations for 20–50 Kev Electrons
    AIP Publishing ; 1962
    In:  Journal of Applied Physics Vol. 33, No. 1 ( 1962-01-01), p. 233-233
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 33, No. 1 ( 1962-01-01), p. 233-233
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/1.1728500
    Language: English
    Publisher: AIP Publishing
    Publication Date: 1962
    detail.hit.zdb_id: 220641-9
    detail.hit.zdb_id: 3112-4
    detail.hit.zdb_id: 1476463-5
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  • 5
    Online Resource
    Online Resource
    Ne–H–H potential energy surface including electron correlation
    AIP Publishing ; 1975
    In:  The Journal of Chemical Physics Vol. 63, No. 5 ( 1975-09-01), p. 1741-1747
    Details
    In: The Journal of Chemical Physics, AIP Publishing, Vol. 63, No. 5 ( 1975-09-01), p. 1741-1747
    Abstract: An ab initio calculation of the Ne–H–H potential energy hypersurface for a wide range of H2 internuclear separation (0.8⩽R⩽5.0 bohr) and Ne–H2 separation (2.5⩽X⩽6.0 bohr) is reported. Calculations were carried out for both the collinear and perpendicular bisector geometries. For the perpendicular bisector geometry, the potential surface has the property previously found for He–H2 of exerting a contractive force on the H2 molecule as the noble gas atom approaches. The surface demonstrates a crossover point near 3.0 bohr where the contractive force changes to a stretching force. Analytic fits to the potential energy surface are presented and discussed in detail. In particular, the ’’dumbbell’’ model was not found to provide a good description of the potential surface. Because of the wide range in values of X and R for which points were calculated, the surface reported here should be useful for trajectory studies of diatomic dissociation and atom recombination.
    Type of Medium: Online Resource
    ISSN: 0021-9606 , 1089-7690
    URL: Article
    DOI: 10.1063/1.431570
    Language: English
    Publisher: AIP Publishing
    Publication Date: 1975
    detail.hit.zdb_id: 3113-6
    detail.hit.zdb_id: 1473050-9
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  • 6
    Online Resource
    Online Resource
    Electromechanical properties in CaTiO3 modified Na0.5Bi0.5TiO3-BaTiO3 solid solutions above morphotropic phase boundary
    AIP Publishing ; 2022
    In:  AIP Advances Vol. 12, No. 3 ( 2022-03-01)
    Details
    In: AIP Advances, AIP Publishing, Vol. 12, No. 3 ( 2022-03-01)
    Abstract: The structural, electromechanical, and dielectric properties of (1 − x)(0.8Na0.5Bi0.5TiO3-0.2BaTiO3)-xCaTiO3 [(1 − x) (0.8NBT-0.2BT)-xCT] ceramics are studied as candidates for room temperature actuators with high field-induced strain. The choice of 0.8NBT-0.2BT as a starting composition is motivated by the large tetragonality in this concentration range, even though it is located far away from the morphotropic phase boundary. CaTiO3 was chosen as a third component to decrease the depolarization temperature and achieve a high field-induced strain at room temperature. The measured strains at the field-induced phase transition are remarkably lower than might be expected from the jump in unit cell parameters at the phase transition. This inconsistency could be related to an incomplete field-induced phase transition from the ferroelectric phase to the nonpolar phase. Among all of the manufactured samples, the phase transition is close to room temperature in the composition with x = 0.100, which allows obtaining unipolar strains up to 0.23% at E = 65 kV/cm. Electrostrictive-like strain was observed not only above the depolarization temperature but also in the region of field-induced phase transition.
    Type of Medium: Online Resource
    ISSN: 2158-3226
    URL: Article
    DOI: 10.1063/5.0072329
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 2583909-3
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  • 7
    Online Resource
    Online Resource
    Aligning Single Crystals for X-Ray Diffraction
    AIP Publishing ; 1952
    In:  Review of Scientific Instruments Vol. 23, No. 8 ( 1952-08-01), p. 442-443
    Details
    In: Review of Scientific Instruments, AIP Publishing, Vol. 23, No. 8 ( 1952-08-01), p. 442-443
    Type of Medium: Online Resource
    ISSN: 0034-6748 , 1089-7623
    URL: Article
    DOI: 10.1063/1.1746349
    Language: English
    Publisher: AIP Publishing
    Publication Date: 1952
    detail.hit.zdb_id: 209865-9
    detail.hit.zdb_id: 1472905-2
    SSG: 11
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  • 8
    Online Resource
    Online Resource
    Thickness Measurement of Thin Coatings by X—Ray Absorption
    AIP Publishing ; 1946
    In:  Review of Scientific Instruments Vol. 17, No. 3 ( 1946-03-01), p. 99-101
    Details
    In: Review of Scientific Instruments, AIP Publishing, Vol. 17, No. 3 ( 1946-03-01), p. 99-101
    Abstract: A method is described for determining the thickness of thin coatings on crystalline bases by means of an x-ray source and a Geiger counter, both situated on the same side of the coating. The x-rays pass through the coating and are reflected at a Bragg diffraction angle from the base, back to the counter, their intensity being reduced by absorption due to the double transmission through the coating. The thickness of the coating is computed from the measured absorption. The method is applicable to coating thicknesses in the range 10−5 to 10−2 centimeter.
    Type of Medium: Online Resource
    ISSN: 0034-6748 , 1089-7623
    URL: Article
    DOI: 10.1063/1.1770449
    Language: English
    Publisher: AIP Publishing
    Publication Date: 1946
    detail.hit.zdb_id: 209865-9
    detail.hit.zdb_id: 1472905-2
    SSG: 11
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  • 9
    Online Resource
    Online Resource
    Compact Curved-Crystal X-Ray Spectrometer
    AIP Publishing ; 1958
    In:  Review of Scientific Instruments Vol. 29, No. 5 ( 1958-05-01), p. 425-426
    Details
    In: Review of Scientific Instruments, AIP Publishing, Vol. 29, No. 5 ( 1958-05-01), p. 425-426
    Abstract: A curved-crystal spectrometer has been designed with all the mechanism except the crystal and detector arms contained in a box 6×7×3½ inches. Three sets of arms are provided for focusing circles of 10-, 20-, and 40-cm radius. Either automatic drive at from ½ to 8 degrees 2θ per minute or manual scanning may be used. Precision-cut commercial gears result in accurate positioning and less than 0.01° 2θ backlash in the drive mechanism. Thus the spectrometer is satisfactory for use with rather perfect crystals such as quartz as well as with the alkali halides. Interchange of crystals and alignment of new crystals is simple and rapid.
    Type of Medium: Online Resource
    ISSN: 0034-6748 , 1089-7623
    URL: Article
    DOI: 10.1063/1.1716214
    Language: English
    Publisher: AIP Publishing
    Publication Date: 1958
    detail.hit.zdb_id: 209865-9
    detail.hit.zdb_id: 1472905-2
    SSG: 11
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  • 10
    Online Resource
    Online Resource
    Electron Probe X-Ray Microanalyzer
    AIP Publishing ; 1957
    In:  Review of Scientific Instruments Vol. 28, No. 9 ( 1957-09-01), p. 709-712
    Details
    In: Review of Scientific Instruments, AIP Publishing, Vol. 28, No. 9 ( 1957-09-01), p. 709-712
    Abstract: A 1–3 micron electron probe of simplified design has been constructed for x-ray spectrochemical analysis of metallic and nonmetallic specimens. At operating conditions of 20–30 kv and less than 0.1 microampere beam current, counting rates of about 3000 counts per second are obtained from pure elements such as iron; thus compositions as low as a few tenths percent are detectable. At increased voltage and current and with a beam size of 10–20 micron, counting rates may be increased to 50 000 counts per second. Applications include analysis of inclusions in metals and minerals, mass transfer material from liquid-metal cooling systems, phase composition, and intermetallic diffusion studies.
    Type of Medium: Online Resource
    ISSN: 0034-6748 , 1089-7623
    URL: Article
    DOI: 10.1063/1.1715982
    Language: English
    Publisher: AIP Publishing
    Publication Date: 1957
    detail.hit.zdb_id: 209865-9
    detail.hit.zdb_id: 1472905-2
    SSG: 11
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