Journal ArticleDOI
Molecular Constants and Internuclear Potential of Ground-State Molecular Iodine
TLDR
In this paper, a reanalysis of the spectroscopic data for ground-state iodine yields improved rotational constants and vibrational energies which are used to compute a new RKR potential.Abstract:
A reanalysis of the spectroscopic data for ground-state iodine yields improved rotational constants and vibrational energies which are used to compute a new RKR potential. Polynomial representations of the vibrational energies and rotational constants are presented which fit all the data to within the respective experimental precision of Verma and of Rank and Baldwin. New approaches are introduced for separately obtaining the rotational Bυ and Dυ constants and for estimating error bounds for computed RKR turning points.read more
Citations
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Journal ArticleDOI
Femtosecond wave packet and chemical reaction dynamics of iodine in solution: Tunable probe study of motion along the reaction coordinate
TL;DR: In this article, one-and two-color time-domain probing of the resonant dichroic response of iodine in n−hexane following femtosecond B•X excitation at 580 nm is described.
Journal ArticleDOI
Molecular constants and Dunham expansion parameters describing the B-X system of the iodine molecule
TL;DR: In this paper, new molecular constants and polynomial expansion parameters for the B - X system of iodine were given for the bands with 0 ≤ v " ≤ 9 and 1 ≤ v '' ≤ 62", with standard deviations of 0.001, 0.0017, and 0.004 cm −1, respectively.
Journal ArticleDOI
Controlled dissociation of I2 via optical transitions between the X and B electronic states
TL;DR: The I 2 molecule, which has been the subject of a great deal of femtosecond work, is studied theoretically as a prospect for experimental control and the optimal field indicates a simple underlying structure, in contrast with many previous fields obtained by optimal control theory.
Journal ArticleDOI
Microscopic Reversibility for Rates of Chemical Reactions Carried Out with Partial Resolution of the Product and Reactant States
TL;DR: In this paper, the authors considered the application of the principle of microscopic reversibility for reaction rates measured in experiments that reveal some of the dependence on the rotational, vibrational, and/or translational states of the reactants or products.
Journal ArticleDOI
Femtosecond transient-grating techniques: Population and coherence dynamics involving ground and excited states
TL;DR: Time-resolved transient grating (TG) signals arising from four-wave mixing (FWM) processes are explored for the study of molecular dynamics in gas-phase systems ranging from single atoms to large polyatomic molecules as discussed by the authors.
References
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Journal ArticleDOI
Calculation of Intensity Distribution in the Vibrational Structure of Electronic Transitions: The B3Π0+u—X1Σ0+g Resonance Series of Molecular Iodine
Abstract: Franck—Condon overlap integrals have been calculated which predict within experimental error the intensity distribution of the sixty measured lines in the visible fluorescence spectrum of molecular iodine, B 3Π0+u(v′ = 15, 16, or 26)→X 1Σ0+g(v″ = 0 to 69). Rydberg—Klein—Rees potentials were used for both electronic states, and exact vibrational eigenfunctions were obtained by direct numerical solution of the radial Schrodinger equation, including vibration—rotation interaction. The electronic transition moment was assumed to be independent of internuclear distance. Overlap integrals derived in the same way for Morse potentials fail to give even qualitative agreement with experiment for lines with v″≳10. Because of the rapid oscillation of the vibrational wavefunctions for high v′ and v″, a shift in the potential of only 0.002 A is found to alter appreciably the calculated intensity distribution; thus the agreement obtained provides a very severe test of the RKR potentials and the Franck—Condon principle. The radiative lifetime of the B state has also been calculated from the absolute intensity of a single line and the integrated intensity of the band system, and the results compare favorably with direct lifetime measurements.
Journal ArticleDOI
Our Knowledge of the Fundamental Constants of Physics and Chemistry in 1965
TL;DR: In this article, the authors present a consistent set of values of the fundamental constants and present a careful and complete description of the steps taken to reach this end, with particular emphasis being placed on the identification and isolation of discrepancies and inconsistencies.
Journal ArticleDOI
Ultraviolet Resonance Spectrum of the Iodine Molecule
TL;DR: The ultraviolet spectrum of I2 observed in electric discharges in the region 1830-2370 A has been photographed at high resolution with a 21ft vacuum grating spectrograph, and a thorough and complete analysis of the data in this region is given.
Journal ArticleDOI
On the Recalculation of the Potential Curves for the Ground States of I2 and H2
TL;DR: In this article, a program for evaluating the integrals which appear in the Rydberg-Klein-Rees (RKR) method of determining potential curves from spectroscopic data is given.
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