Excess energy dependence in radiationless transitions. Triplet to ground state nonradiative rate calculations in benzene

1984 ◽  
Vol 81 (8) ◽  
pp. 3554-3558 ◽  
Author(s):  
H. Hornburger ◽  
H. Kono ◽  
S. H. Lin
Keyword(s):  
Energy Dependence ◽  
Ground State ◽  
Excess Energy ◽  
Radiationless Transitions

Effect of the lifetime of the intermediate 5Li state in the 6Li(3He, αp)4He reaction

1968 ◽  
Vol 46 (20) ◽  
pp. 2241-2251 ◽  
Author(s):  
M. A. Reimann ◽  
P. W. Martin ◽  
E. W. Vogt
Keyword(s):  
Dimensional Analysis ◽  
Energy Dependence ◽  
Ground State ◽  
Intermediate State ◽  
Two Dimensional ◽  
Short Life ◽  
Semiclassical Model ◽  
Analysis Technique ◽  
The Asymmetry

A cylindrical asymmetry about the direction of motion of 5Li has been seen in the breakup of the ground state of this nucleus observed as an intermediate state in the reaction 6Li(3He, pα)4He. Measurements were made at bombarding energies of 1.00, 1.25, and 1.50 MeV with isotopically enriched LiF targets using a two-dimensional analysis technique. We explain both the rough magnitude of the asymmetry and its qualitative energy dependence in terms of a simple semiclassical model. In this model the origin of the asymmetry is associated with the short life of the 5Li intermediate state and with the memory retained by the proton during this short life of its "localization" at the time of formation of 5Li.

Electronic Excess Energy in Modulated Positive-Background Model

1982 ◽  
Vol 21 ◽  
Author(s):  
H. Yahauchi
Keyword(s):  
Ground State Energy ◽  
Ground State ◽  
State Energy ◽  
Electron Gas ◽  
Alloy System ◽  
Excess Energy ◽  
Absolute Zero ◽  
Background Model ◽  
Zero Temperature ◽  
Modulation Wavelength

ABSTRACTElectronic excess energy of a composition-modulated alloy system at absolute zero temperature is obtained using Hohenberg and Kohn's formula (for the ground-state energy of an inhomogeneous electron gas) in a modulated positive-background model. Dependence of the electronic excess energy on the modulation wavelength is studied. Two leading terms in the excess energy are examined to elucidate the limitation of this model.

scholarly journals Fluorescence Property and its Magnetic Field Dependence Across the Photodissociation Threshold of CH3CHO and CD3CDO in a Supersonic Jet

1994 ◽  
Vol 13 (3-4) ◽  
pp. 207-222 ◽  
Author(s):  
Nobuhiro Ohta
Keyword(s):  
Magnetic Field ◽  
Excitation Energy ◽  
Triplet State ◽  
Energy Dependence ◽  
Level Density ◽  
Excess Energy ◽  
Zero Field ◽  
Statistical Limit ◽  
Fluorescence Characteristics ◽  
Dissociation Threshold

Fluorescence characteristics of jet-cooled acetaldehyde at zero field is confirmed to change from the small molecule behavior to the statistical limit behavior in CH3CHO and to the intermediate case in CD3CDO, as the excitation energy increases across the dissociation threshold located below 320 nm. The excitation energy dependence both of the intensity and of the lifetime of the slow fluorescence shows that the dissociation rate becomes faster abruptly with increasing excess energy above the threshold, and the excess energy dependence above the threshold seems to be more drastic in CH3CHO than in CD3CDO. External magnetic field as well as the dissociation in the triplet state plays a role to increase the level density of the triplet state coupled to S1. On excitation below the dissociation threshold, the magnetic quenching of fluorescence becomes more efficient with increasing excess energy and the efficiency of the quenching is larger in CD3CDO than that in CH3CHO by a factor of about 2. On excitation above the threshold, however, the efficiency becomes lower with increasing excitation energy. Thus, the magnetic field effects on fluorescence also change drastically across the dissociation threshold.

Excess energy dependence of internal conversion in the S1 state of azulene

1988 ◽  
Vol 89 (7) ◽  
pp. 4441-4443 ◽  
Author(s):  
Sudhir K. Kulkarni ◽  
Jonathan E. Kenny
Keyword(s):  
Energy Dependence ◽  
Internal Conversion ◽  
Excess Energy
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