| Numéro |
J. Phys. Colloques
Volume 39, Numéro C6, Août 1978
The XVth International Conference on low temperature physicsQuantum Fluids and Solids Superconductivity |
|
|---|---|---|
| Page(s) | C6-1629 - C6-1630 | |
| DOI | https://doi.org/10.1051/jphyscol:19786610 | |
The XVth International Conference on low temperature physics
Quantum Fluids and Solids
Superconductivity
J. Phys. Colloques 39 (1978) C6-1629-C6-1630
DOI: 10.1051/jphyscol:19786610
Department of Physics, University of California, and Materials and Molecular Research Division, Lawrence Berkeley Laboratory, Berkeley, California 94720, U.S.A.
Quantum Fluids and Solids
Superconductivity
J. Phys. Colloques 39 (1978) C6-1629-C6-1630
DOI: 10.1051/jphyscol:19786610
A NEW MEASUREMENT OF THE COSMIC BLACK BODY RADIATION
D.P. Woody, N.S. Nishioka and P.L. RichardsDepartment of Physics, University of California, and Materials and Molecular Research Division, Lawrence Berkeley Laboratory, Berkeley, California 94720, U.S.A.
Résumé
Nous décrivons une expérience qui a permis de mesurer le spectre du rayonnement cosmique fondamental dans l'intervalle des nombres d'onde allant de 2 à 40 cm-1. Diverses techniques de basses températures furent utilisées, parmi lesquelles des pompes à effet fontaine et un détecteur refroidi par 3He. Le spectre est un très bon accord avec celui d'un corps noir à 2,9 K.
Abstract
An experiment to measure the spectrum of the cosmic background radiation over the wavenumber range from 2 to 40 cm-1 is described. A variety of low temperature techniques including fountain effect pumps and a 3He cooled detector were used to obtain high accuracy and sensitivity. The resulting spectrum is a close fit to a 2.9 K black body.