Time and internal energy dependent fluorescence spectra of naphthol⋅water clusters

1994 ◽  
Vol 101 (9) ◽  
pp. 7327-7336 ◽  
Author(s):  
Richard D. Knochenmuss ◽  
David E. Smith
Keyword(s):  
Internal Energy ◽  
Fluorescence Spectra ◽  
Water Clusters ◽  
Energy Dependent

Excess Energy-Dependent Photodissociation Probabilities for O2- in Water Clusters: O2-.cntdot.(H2O)n, 1 .ltoreq. n .ltoreq. 33

1995 ◽  
Vol 99 (21) ◽  
pp. 8453-8457 ◽  
Author(s):  
David J. Lavrich ◽  
Mark A. Buntine ◽  
David Serxner ◽  
Mark A. Johnson
Keyword(s):  
Water Clusters ◽  
Excess Energy ◽  
Energy Dependent

scholarly journals Multiphoton Dissociation of Phenylsilane Upon Excitation at 212.5 NM

1996 ◽  
Vol 16 (3) ◽  
pp. 157-166 ◽  
Author(s):  
Mohamed Oujja ◽  
Margarita Martín ◽  
Rebeca De Nalda ◽  
Marta Castillejo
Keyword(s):  
Internal Energy ◽  
Excited States ◽  
Fluorescence Spectra ◽  
Narrow Band ◽  
Energy Content ◽  
Laser Energy ◽  
Emission Spectra ◽  
Molecular Fragments ◽  
Multiphoton Dissociation ◽  
Nm Range

The photodissociation processes that follow the photolysis of phenylsilane with a narrow band laser at 212.5 nm were studied by observing photofragment fluorescence spectra in the 200 to 900 nm range. Emission from several excited states of Si atoms was detected together with emissions from the molecular fragments SiH(A2∆) and C2(d3∏g). Si and SiH emissions show a quadratic dependence with laser energy whereas dependence for C2 emission is cubic, indicating the participation of two and three photon processes in the formation of the respective fragments. The emission spectra of the molecular fragments provides information about their internal energy content and allows discussion of the possible channels responsible for the appearance of those fragments.

SIGMAL: A Program for Calculating L-Shell lonization Cross-Sections

1981 ◽  
Vol 39 ◽  
pp. 198-199 ◽  
Author(s):  
R.F. Egerton
Keyword(s):  
Cross Sections ◽  
Fortran Program ◽  
Absorption Data ◽  
X Ray ◽  
Atomic Electrons ◽  
Energy Dependent ◽  
Hydrogenic Model ◽  
Electron Energy Loss ◽  
X Ray Absorption ◽  
Shell Ionization

SIGMAL is a short (∼ 100-line) Fortran program designed to rapidly compute cross-sections for L-shell ionization, particularly the partial crosssections required in quantitative electron energy-loss microanalysis. The program is based on a hydrogenic model, the L1 and L23 subshells being represented by scaled Coulombic wave functions, which allows the generalized oscillator strength (GOS) to be expressed analytically. In this basic form, the model predicts too large a cross-section at energies near to the ionization edge (see Fig. 1), due mainly to the fact that the screening effect of the atomic electrons is assumed constant over the L-shell region. This can be remedied by applying an energy-dependent correction to the GOS or to the effective nuclear charge, resulting in much closer agreement with experimental X-ray absorption data and with more sophisticated calculations (see Fig. 1 ).

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