RESEARCH INVESTIGATION DIRECTED TOWARD EXTENDING THE USEFUL RANGE OF THE ELECTROMAGNETIC SPECTRUM.
Progress rept. no. 12 (Quarterly progress rept. no. 4), 16 Sep-15 Dec 65,
COLUMBIA RADIATION LAB NEW YORK
Pagination or Media Count:
Specular reflection of x rays by total reflection can be produced at grazing incidence from a uniform gold film evaporated onto annealed glass. Two designs for utilizing this effect to produce large-area x-ray gathering systems are presented. A magnetic resonance rf spectrometer is being constructed to study the hyperfine structure of the metastable states in potassium, rubidium, and lithium. With this spectrometer, magnetic quenching rather than inhomogeneous field deflection will be used for state selection. A second optical delay line was added to the existing photon -echo apparatus to provide a third excitation pulse. In addition to two-pulse echoes of the type previously studied, this arrangement produces a stimulated photon echo delayed from the third pulse by the time interval between the first two pulses. A precise measurement of the resonant self-broadening of the 6s26p7s3P10 state of lead has determined the collision-induced reaction rate to be 3.21 x 10 to the -8th power ccsec x N.
- Electrical and Electronic Equipment
- Atomic and Molecular Physics and Spectroscopy
- Solid State Physics