A measurement of the intensity of the cosmic background radiation at 3.0 CM

Details A measurement of the intensity of the cosmic background radiation at 3.0 CM A measurement of the intensity of the cosmic background radiation at 3.0 CM

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984phdt.........6f&link_type=abstract

Ph.D. Thesis California Univ., Berkeley.

Statistics

4

Airglow, Background Radiation, Cooling, Cosmic Rays, Liquid Helium, Quantum Statistics, Rayleigh Scattering, Atmospheric Radiation, Rayleigh Number, Thermodynamic Properties, Wavelengths

Scientific paper

The intensity of the cosmic background radiation (CBR) was measured at a wavelength of 3.0 cm as part of a program to measure the Rayleigh-Jeans spectrum of the CBR at five wavelengths between 0.33 cm and 12 cm. The atmospheric emission was measured by rotating the radiometer. The CBR temperature is found by direct comparison with a liquid helium cooled absolute reference load. The weighted mean of five measurements is Tcbr = 2.70 + or - 0.09 K. Fitting these five measurements to a Bose-Einstein spectrum yields a thermodynamic temperature of 2.75 or 0.15 K and a chemical potential micrometer = (2.30 or 5.29) x 10(3). These is no evidence for a bremsstrahlung repopulation of photons at long wavelengths. The data are consistent with a blackbody spectrum of the CBR.

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