5 Matching Results

Search Results

Results: 1 - 5
open access

Coherence in multilevel systems

Description: Mathematical descriptions of an excited state multilevel system are developed to include progressively the effects of coherent coupling, feeding, decay and relaxation, and the expressions are illustrated with several pulse coherence experiments utilizing zero field optically detected magnetic resonance of excited triplet states. A new method is described in which the time development of the coherent components in a multilevel system is monitored by using an observable that can measure only rela… more
Date: July 1, 1975
Creator: Breiland, W.G.
Partner: UNT Libraries Government Documents Department
open access

Proton--proton analyzing power measurements at 16 MeV

Description: Few attempts have been made to measure accurately the proton-proton analyzing powers at low energies. With the advent of polarized particle beams the measurement can now be made with high accuracy. Analyzing powers were measured at nine scattering angles from 10$sup 0$ to 35$sup 0$ in the laboratory system. As a check on systematic errors, analyzing power measurements were also made by scattering protons from $sup 4$He. In the p Vector-p case the measured values are in very good agreement with … more
Date: July 1, 1975
Creator: Lovoi, P.A.
Partner: UNT Libraries Government Documents Department
open access

Effect of free-particle collisions in high energy proton and pion-induced nuclear reactions

Description: The effect of free-particle collisions in simple ''knockout'' reactions of the form (a,aN) and in more complex nuclear reactions of the form (a,X) was investigated by using protons and pions. Cross sections for the $sup 48$Ti(p,2p)$sup 47$Sc and the $sup 74$Ge(p,2p)$sup 73$Ga reactions were measured from 0.3 to 4.6 GeV incident energy. The results indicate a rise in (p,2p) cross section for each reaction of about (25 +- 3) percent between the energies 0.3 and 1.0 GeV, and are correlated to a la… more
Date: July 1, 1975
Creator: Jacob, N.P. Jr.
Partner: UNT Libraries Government Documents Department
Back to Top of Screen