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1990

Physics Faculty Research and Scholarship

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Full-Text Articles in Physics

Correlation-Dimension Calculations For Broadband Intensity Fluctuations In Emission From A Heavily Saturated Source Of Amplified Spontaneous Emission, B. Das, Alfonso M. Albano, N. B. Abraham Jun 1990

Correlation-Dimension Calculations For Broadband Intensity Fluctuations In Emission From A Heavily Saturated Source Of Amplified Spontaneous Emission, B. Das, Alfonso M. Albano, N. B. Abraham

Physics Faculty Research and Scholarship

Broadband intensity fluctuations from a heavily saturated source of amplified spontaneous emission (ASE) operating on the 3.51-μm transition of xenon show no evidence of a dynamical origin represented by a low-dimensional underlying chaotic attractor. The broadband coupled-mode fluctuations in ASE thus seem to be stochastic when contrasted with the recently reported deterministic nature of similar broadband fluctuations of single-mode lasers operating on the same transition.


Methyl Reorientation In Methylphenanthrenes. Ii. Solid-State Proton Spin-Lattice Relaxation In The 1-Ch3, 9-Ch3, And 1-Cd3, 9-Ch3 Systems, F B. Mallory, C. W. Mallory, K. G. Conn, Peter A. Beckmann Jan 1990

Methyl Reorientation In Methylphenanthrenes. Ii. Solid-State Proton Spin-Lattice Relaxation In The 1-Ch3, 9-Ch3, And 1-Cd3, 9-Ch3 Systems, F B. Mallory, C. W. Mallory, K. G. Conn, Peter A. Beckmann

Physics Faculty Research and Scholarship

We report proton Zeeman relaxation rates R as a function of temperature T at 8.5 and 53 MHz in polycrystalline 1,9-dimethylphenanthrene (1,9-DMP) and l-trideuteriomethyl-9-methylphenanthrene (1, 9-DMP[1-d3]). The data are interpreted using a Davidson-Cole spectral density for intramolecular reorientation and the implications of this are discussed. R vs T−1data for 1,9-DMP[1-d3] are used to determine the parameters that characterize the reorientation of the 9-methyl group. By assuming that the parameters characterizing the dynamics of the 9-methyl group are the same in 1,9-DMP and 1,9-DMP[1-d3], we subtract out the R vs T ...