Measurements of the thermal radiative properties of liquid uranium

Journal Article · Mon Nov 01 04:00:00 EST 1993 · Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States)

DOI:https://doi.org/10.1115/1.2911355· OSTI ID:5573580

Havstad, M A; McLean, W II ^[1]; Self, S A ^[2]

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1. Lawrence Livermore National Lab., CA (United States)
2. Stanford Univ., CA (United States)

Measurements of the thermal radiative properties of liquid uranium have been made using an instrument with two optical systems, one for measuring the complex index of refraction by ellipsometry, the other for measuring the normal spectral emissivity by direct comparison to an integral blackbody cavity. The measurements cover the wavelength range 0.4-10 [mu]m with sample temperatures between 1410 and 1630 K. Two 5-KeV ion sputter guns and an Auger spectrometer produce and verify, in situ, atomically pure sample surfaces. Good agreement between the two methods is observed for the normal spectral emissivity, which varies with wavelength in a manner typical of transition metals. The two components of the complex index of refraction - the index of refraction and the extinction coefficient - increase with wavelength from approximately 3 at 0.4 [mu]m to approximately 20 at 9.5 [mu]m. Both components of polarized reflectivity are shown for visible to infrared wavelengths. 24 refs., 7 figs., 3 tabs.

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5573580
• Journal Information: Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States), Journal Name: Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States) Vol. 115:4; ISSN 0022-1481; ISSN JHTRAO
• Country of Publication: United States
• Language: English

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ACTINIDES
AUGER ELECTRON SPECTROSCOPY
DATA
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELEMENTS
ELLIPSOMETRY
FLUIDS
INFORMATION
INFRARED RADIATION
LIQUID METALS
LIQUIDS
MATHEMATICAL MODELS
MEASURING METHODS
METALS
NUMERICAL DATA
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RADIATIONS
REFRACTION
SPECTROSCOPY
SPUTTERING
THEORETICAL DATA
THERMODYNAMIC PROPERTIES
ULTRAHIGH VACUUM
URANIUM