Spectroscopy of jet‐cooled metal–monocyclopentadienyl complexes: Laser excitation spectra of calcium and cadmium cyclopentadienides

1991 ◽  
Vol 94 (3) ◽  
pp. 1752-1758 ◽  
Author(s):  
Andrew M. Ellis ◽  
Eric S. J. Robles ◽  
Terry A. Miller
Keyword(s):  
Laser Excitation ◽  
Excitation Spectra

Resonant Photoluminescence Excitation in GaAs Grown Directly on Si

1988 ◽  
Vol 116 ◽  
Author(s):  
S. Zemon ◽  
C. Jagannath ◽  
S. K. Shastry ◽  
W. J. Miniscalco ◽  
G. Lambert
Keyword(s):  
Ground State ◽  
Heavy Hole ◽  
Laser Excitation ◽  
Free Exciton ◽  
Light Hole ◽  
The Other ◽  
Organometallic Vapor Phase Epitaxy ◽  
Photoluminescence Excitation ◽  
Excitation Spectra ◽  
Excitation Line

AbstractWe describe new results observed during resonant excitation in the excitonic region of GaAs grown directly on Si by organometallic vapor phase epitaxy. Two resolved features were found in the light hole photoluminescence (PL) region, one identified with a free exciton process and the other with donor-related transitions. Features which track the laser excitation line were observed and identified with a process in which a donor is excited from the n=l ground state to an n=2 excited state. The PL excitation spectra associated with these features have spectral widths as narrow as 1.5 meV. PL spectral widths of ~3 meV have been attained for the heavy hole exciton band, representing the narrowest value obtained for OMVPE material and an improvement of about 30% over our best previous results.

Spectroscopy of metastable species in a free-jet expansion: the β ← A transition in IBr

1994 ◽  
Vol 72 (11-12) ◽  
pp. 1294-1306 ◽  
Author(s):  
Jason O. Clevenger ◽  
Quentin P. Ray ◽  
Joel Tellinghuisen ◽  
Xiaonan Zheng ◽  
Michael C. Heaven
Keyword(s):  
High Resolution ◽  
Laser Irradiation ◽  
Laser Excitation ◽  
Excitation Spectra ◽  
Detailed Characterization ◽  
Free Jet ◽  
X State ◽  
Π State ◽  
Existing Data

The A 1(3Π) state of IBr is observed in a free-jet expansion of IBr in Ar, following photolysis with ArF laser irradiation. Laser excitation spectra are obtained for the β 1(3P2) ← A transition in medium (0.5 cm−1) and high (0.08 cm−1) resolution. Sixteen ν′–ν″ bands recorded in high resolution are rotationally analyzed, providing the first detailed characterization of the lowest three νlevels in the A state. An additional ~50 bandheads in the ν″ = 0 and 1 progressions are recorded for both I79Br and I81Br. The new data, which sample ν′ levels in the range 31–71, are combined with existing information for low ν in the β state to provide improved constants for the β state. These results are merged with least-squares parameters from a detailed reanalysis of existing data for the A and X(1Σ+) states to yield spectroscopic parameters valid for ν = 0–20 in the X state and ν = 0–26 in the A state. Among these results are the first precise estimates of the equilibrium parameters in the A state: Te = 12 369.68 (14) cm−1, ωe = 134.22 (13) cm−1, Be = 0.042 40 (5) cm−1, Re = 2.8583 (16) Å.

Fourier Transform Fluorescence Spectrometry

1988 ◽  
Vol 42 (8) ◽  
pp. 1563-1566 ◽  
Author(s):  
B. Hlivko ◽  
H. Hong ◽  
R. R. Williams
Keyword(s):  
Fourier Transform ◽  
Fluorescence Polarization ◽  
Fluorescence Spectra ◽  
Laser Excitation ◽  
Emission Spectra ◽  
Laser Fluorescence ◽  
Fluorescence Spectrometry ◽  
Excitation Spectra ◽  
Polarization Spectra ◽  
Monochromatic Source

A variety of fluorescence spectra have been measured interferometrically, demonstrating the feasibility of Fourier Transform Fluorescence Spectrometry (FT-FS). Emission spectra have been measured with the use of a monochromatic source and an interferometer as the emission selector. Excitation spectra have been measured with the use of a multi-line laser. Fluorescence polarization spectra have also been recorded with the use of laser excitation. The analytical characteristics of working curves are discussed.

Laser-induced fluorescence of MnS: rotational analysis of the A6Σ+ – X6Σ+ transition

1985 ◽  
Vol 63 (11) ◽  
pp. 1380-1388 ◽  
Author(s):  
M. Douay ◽  
B. Pinchemel ◽  
C. Dufour
Keyword(s):  
Laser Excitation ◽  
Band System ◽  
Single Mode ◽  
Laser Induced Fluorescence ◽  
Spin Rotation ◽  
Spin Interaction ◽  
Rotational Analysis ◽  
Excitation Spectra ◽  
High Resolution Spectrometer ◽  
Resolution Spectrometer

Laser-excitation spectra of the rotational structure of the A6Σ+ – X6Σ+ transition of MnS has been performed. The combination of a single-mode dye laser and a high-resolution spectrometer have allowed analysis of a very congested spectrum in which the spin–rotation interaction completely dominates the spin–spin interaction. The (0,1) and (0,3) bands have been analyzed from laser-excitation spectra, and some information has been extracted from the emission spectrum of the (0,0) band. In addition, observation of a second band system confirms results already published by Monjazeb and Mohan.

Laser excitation spectra of magnesium oxide in the 353–383 nm region

1985 ◽  
Vol 113 (4) ◽  
pp. 323-329 ◽  
Author(s):  
B. Bourguignon ◽  
J. McCombie ◽  
J. Rostas
Keyword(s):  
Magnesium Oxide ◽  
Laser Excitation ◽  
Excitation Spectra

Spectroscopic Characterization of Open-Shell Cations: Emission and Laser Excitation spectra of Rotationally Cooled CH3(C?C)2X+, X = Cl, Br

1984 ◽  
Vol 67 (5) ◽  
pp. 1222-1232 ◽  
Author(s):  
Dieter Klapstein ◽  
Robert Kuhn ◽  
John P. Maier ◽  
Liubomir Misev ◽  
Martin Ochsner
Keyword(s):  
Laser Excitation ◽  
Spectroscopic Characterization ◽  
Open Shell ◽  
Excitation Spectra

High-resolution visible spectrum for the A3Π(l)–X1Σ+ system of IBr

1994 ◽  
Vol 72 (11-12) ◽  
pp. 1265-1272 ◽  
Author(s):  
Dominique R. T. Appadoo ◽  
Peter F. Bernath ◽  
Robert J. Le Roy
Keyword(s):  
High Resolution ◽  
Mechanical Behaviour ◽  
Laser Excitation ◽  
Visible Spectrum ◽  
Molecular Constants ◽  
Excitation Spectra ◽  
The Core ◽  
Global Fit ◽  
X State ◽  
Infrared Data

New high-resolution absorption and laser excitation spectra of the A3Π(1)–X1Σ+ system of IBr, consisting of approximately 4000 lines of over 40 bands spanning the vibrational range ν′ = 6–29 and ν″ = 1–4 for each of the two isotopomers, have been recorded and analyzed. Combined with previous microwave and infrared data and fluorescence progressions into the X state, and with new data obtained from laser excitation of the lowest levels of the A state, they formed the core of a global fit to mass-reduced Dunham expansions that yields new molecular constants for the A and X states of I79Br and I81Br. Inability to fully account for all data within the experimental uncertainties points to the existence of substantial perturbations or "non-mechanical" behaviour for A-state levels ν′ > 24.

scholarly journals Laser Excitation Spectra and Lifetime Measurements of the CO d(3Δi) State

1991 ◽  
Vol 11 (2) ◽  
pp. 119-127
Author(s):  
Bradley E. Miller ◽  
Peter A. Schulz
Keyword(s):  
Excitation Spectrum ◽  
Laser Excitation ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Excitation Spectra ◽  
Lifetime Measurements ◽  
Radiative Lifetimes ◽  
Rotational States ◽  
Vibrational Levels ◽  
First Time

CO in a supersonic pulsed beam is excited to the d3Δi state by VUV photons generated in a nonlinear four-wave mixing scheme. An excitation spectrum of the CO d3Δi (ν′ = 20, J′ = 1–3) is obtained at a resolution of 0.8 cm−1 for the first time. The radiative lifetimes of the rotational states are measured as 1.70 ± 0.08 μs, which are similar to but shorter than the lifetimes associated with lower vibrational levels.

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