Now showing items 6855-6874 of 10784

• #### Photodynamics of iodobenzene in the B continuum studied by resonance Raman spectroscopy ﻿

(1994)
A new technique for obtaining continuously scanned Raman excitation profiles (REP's) is described. The technique relies on simultaneous stepping of the laser wavelength (excitation frequency), the angle of a frequency-doubling ...

(1958)

(1959)
• #### Photoelastic study of stresses in frames with deep members ﻿

(1961)
The photoelastic technique was employed to investigate the normal stress variation in elastic pinned-end portal rigid frames with deep members. Length to depth ratios were varied for both beams and columns.. Plastic models ...

(1979)
• #### Photoelectron spectroscopy of negative cobalt clusters: Correlation of promotion energy to reactivity ﻿

(1992)
Photoelectron spectra of negatively charged cobalt clusters in the size range of 4-26 atoms have been obtained. The electron affinity (E.A.) values along with the reported ionization potential (I.P.) have been used to ...

(1971)
• #### PHOTOEXCITATION OF CESIUM THROUGH DISSOCIATIVE STATES OF THE CESIUM DIMER ﻿

(1987)
The two-photon excitation of cesium to high-n Rydberg levels through resonant dissociative states of the dimer is investigated over the wavelength range 6000-5900A. Highly vibrationally excited $\sp1\Sigma\sb{\rm g}\sp+$ ...
• #### PHOTOEXCITATION OF REACTION COMPLEXES ﻿

(1984)
Emission at the Na D lines has been observed from the intersection of crossed molecular beams of K and NaCl irradiated by a CW dye laser at wavelengths from 590 nm to 735 nm. The three-beam signal exhibits a threshold near ...
• #### Photofragmentation studies of semiconductor positive cluster ions ﻿

(1989)
Laser photofragmentation of Si, Ge, and GaAs positive cluster ions prepared by laser vaporization and supersonic beam expansion has been investigated in a tandem time-of-flight mass spectrometer. Si$\sb{\rm n}\sp +$ up to ...
• #### PHOTOIONIZATION EXPERIMENTS IN A SUPERSONIC MOLECULAR BEAM ﻿

(1981)
The uses of resonance enhanced two-photon ionization (R2PI) for studying unimolecular energy redistribution of molecules in a supersonic molecular beam is explored. The R2PI process relies on initially exciting a molecule ...
• #### Photoluminescence of crystalline thin film buckminsterfullerene ﻿

(1995)
A method is described for the growth of high purity crystalline thin film C$\sb{60}$. Films grown by this method are analyzed by means of x-ray diffraction, low energy electron diffraction, and photoluminescence. An excimeric ...
• #### Photoluminescence of nitrogen-doped zinc selenide by photo-assisted MOCVD ﻿

(1993)
Zinc selenide is a wide band-gap (2.67 eV) II-VI compound semiconductor with potential use as a blue electro-optic device material. Problems with obtaining suitable p-type conductivity have limited device development. Zinc ...
• #### Photoluminescence studies of single-walled carbon nanotubes: Chirality-resolved length characterization and porphyrin sensitized electronic energy transfer ﻿

(2009)
Photoluminescence spectroscopy has emerged as a powerful technique for characterizing the structure and optical properties of single-walled carbon nanotubes (SWCNT). While SWCNT diameter and chirality information is now ...
• #### Photolysis of azoalkanes. Reactions and kinetics of the 1-cyclopropyl-1,3-cyclopentanediyl biradical and 1-cyclopropylcyclopentyl radical ﻿

(1991)
The 1-cyclopropylcyclopentyl radical (114a) and 1-cyclopropylcyclohexyl radical (114b) were generated in the presence of PhSH via 366 nm photolysis of azo-1-cyclopropylcyclopentane and azo-1-cyclopropylcyclohexane respectively. ...
• #### Photometers on the satellite Aurora 1 ﻿

(1968)
Uses of photometer and combined photometer-particle measurements from a satellite are discussed with respect to increasing understanding of geophysical phenomena. Several potential observational possibilities are explored ...
• #### Photon Management Strategies in Two Dimensional Molybdenum Disulfide ﻿

(2016-07-28)
Here we take a first step toward tackling the challenge of incomplete optical absorption in monolayers of transition metal dichalcogenides for conversion of photon energy, including solar, into other forms of energy. We ...
• #### Photonic band gap materials: Optical properties of hollow spherical shells ﻿

(2001)
Optical transmission studies of three-dimensionally ordered photonic crystals of close-packed spherical shells are presented. These samples are fabricated using a double-template method, which allows for extensive control ...
• #### Photonic crystals at visible, x-ray, and terahertz frequencies ﻿

(2008)
Photonic crystals are artificial structures with a periodically varying refractive index. This property allows photonic crystals to control the propagation of photons, making them desirable components for novel photonic ...
• #### Photonics-based strategies for minimally invasive cancer diagnosis using endogenous and molecular contrast ﻿

(2008)
Optical- and spectroscopic-based screening and imaging strategies possess unique advantages for minimally invasive cancer diagnosis. In this dissertation, we investigated how diagnostic results based on such techniques can ...