D. Hemming

University of Bristol

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J. D. Leslie

Seattle University

Miriam H. Thomas

Combat Capabilities Development Command Soldier Center

M. G. Priestley

University of Bristol

James A. Blackburn

Wilfrid Laurier University

L. W. Kry

R. Sati

Tilka Manjhi Bhagalpur University

Cooperative Institutions

University of Bristol

University of Waterloo

Combat Capabilities Development Command Soldier Center

Armed Forces Institute of Pathology

Seattle University

University of Washington

Johannes Gutenberg University Mainz

University of Illinois Urbana-Champaign

Alfred P. Sloan Foundation

Bristol Robotics Laboratory

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Magnetoreflection of antimony for circularly polarized radiation

Journal of Physics F Metal Physics (1976)

Miriam H. Thomas M. G. Priestley D. Hemming

The magnetoreflection spectrum of antimony has been measured for circularly polarized radiation. The lowest energy peak for the 0.149 eV gap is observed to split into four components, two for each polarization. These show considerable deviations from the Cohen-Lax two-band model, and values of mc=0.240 m0, gc=99 for the conduction band, and mv=0.0164 m0, gv=76 for the valence band, have been inferred from a generalization of the Maltz selection rules.

10.1088/0305-4608/6/3/006

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Helium Film Profile on a Gold and a Quartz Substrate

Canadian Journal of Physics (1971)

D. Hemming

The thickness of the static saturated helium film has been measured by an ellipsometric technique on a gold substrate at 2.13 °K and on a quartz substrate at 2.10 °K. The height, H, and the thickness of the film, d, are related by H = const. × d −n where n = 3.91 ± 0.15 and d = 323 ± 3 Å at H = 1 cm for the gold substrate. For the quartz substrate n = 3.08 ± 0.13 and d = 228 ± 2 Å at H = 1 cm; except that for thicknesses greater than 250 Å, the profile appears to steepen.

10.1139/p71-315

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Far-infrared absorption in bulk samples of superconducting niobium and tantalum

Canadian Journal of Physics (1970)

D. Hemming R. Sati J. D. Leslie

Measurements have been made of far-infrared absorption in bulk samples of superconducting niobium and tantalum at 1.41 °K. The results indicate a gap width 2Δ of 23.8 ± 0.2 cm −1 for niobium and 10.3 ± 0.2 cm −1 for tantalum. The measured values of the critical temperature, T c , for these samples are 9.38 ± 0.04 °K for niobium and 4.33 ± 0.02 °K for tantalum. In terms of these values of T c , 2Δ is 3.66 ± 0.05 kT c for niobium and 3.43 ± 0.08 kT c for tantalum. These values of 2Δ are in good agreement with those obtained by other methods, unlike earlier far-infrared absorption measurements on bulk niobium and tantalum that indicated anomalously low values of 2Δ.

10.1139/p70-157

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A Technique in Ellipsometry for Measuring the Thickness of a Nonabsorbing Film on a Nonabsorbing Substrate

Applied Optics (1969)

D. Hemming

Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text D. Hemming, "A Technique in Ellipsometry for Measuring the Thickness of a Nonabsorbing Film on a Nonabsorbing Substrate," Appl. Opt. 8, 207-208 (1969) Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article

Ellipsometry

10.1364/ao.8.000207

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Far-Infrared Absorption in Bulk Samples of Superconducting d-h.c.p. Lanthanum

Canadian Journal of Physics (1972)

L. W. Kry D. Hemming

Far-infrared absorption measurements have been made on bulk samples of d-h.c.p. lanthanum and the results indicate a gap width, 2Δ, of 11.6 ± 0.3 cm −1 or 1.44 ± 0.04 meV. Using a value of T c = 4.87 ± 0.02 °K, taken from the literature, this gives 2Δ = (3.43 ± 0.09)kT c .

Lanthanum

10.1139/p72-337

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Bolometer Operating Points for Maximum Responsivity

Applied Optics (1968)

James A. Blackburn D. Hemming J. D. Leslie

Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text J. A. Blackburn, D. Hemming, and J. D. Leslie, "Bolometer Operating Points for Maximum Responsivity," Appl. Opt. 7, 979-981 (1968) Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article

10.1364/ao.7.000979

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