Thermal radiative properties of the noble metals at cryogenic temperatures. [Gold]

Journal Article · Sun Aug 01 00:00:00 EDT 1976 · J. Heat Transfer; (United States)

DOI:https://doi.org/10.1115/1.3450573· OSTI ID:7334581

Toscano, W M ^[1]; Cravalho, E G

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1. CTi--Cryogenics, Waltham, MA

Experimental values of the monochromatic, near normal emittance, epsilon/sub lambda N/, of gold at cryogenic temperatures are presented and compared with values predicted by existing theoretical models. From this comparison recommendations are made regarding the engineering suitability of these models. Data obtained for epsilon/sub lambda N/ of gold in the wavelength range 1 to 30..mu.. and at temperatures of 300, 79, and 6.0/sup 0/K are compared with the Drude free electron model, the anomalous skin effect theory for both specular and diffuse electron reflections, and the Holstein quantum mechanical model. Results show that the anomalous skin effect model with diffuse electron reflections predicts epsilon/sub lambda N/ most accurately. At room temperature and at liquid nitrogen temperature the agreement between this model and the data is within 5 percent. At liquid helium temperatures the agreement is somewhat poorer, i.e., within 30 percent.

• OSTI ID: 7334581
• Journal Information: J. Heat Transfer; (United States), Vol. 98:3
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
GOLD
THERMODYNAMIC PROPERTIES
EMISSIVITY
LOW TEMPERATURE
MEDIUM TEMPERATURE
THERMAL RADIATION
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
ELECTROMAGNETIC RADIATION
ELEMENTS
METALS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RADIATIONS
SURFACE PROPERTIES
TRANSITION ELEMENTS
360104* - Metals & Alloys- Physical Properties
656102 - Solid State Physics- Superconductivity- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena- (-1987)