Radiative and non-radiative transition probabilities and quantum yields for excited states of Er3+ in germanate and tellurite glasses

1974 ◽  
Vol 15 (1) ◽  
pp. 125-140 ◽  
Author(s):  
R. Reisfeld ◽  
Y. Eckstein
Keyword(s):  
Excited States ◽  
Transition Probabilities ◽  
Radiative Transition ◽  
Quantum Yields ◽  
Tellurite Glasses

Energies and Auger widths of the high-lying double-excited states for Be-like neon

2011 ◽  
Vol 89 (6) ◽  
pp. 697-702 ◽  
Author(s):  
Lin Zhuo ◽  
Bing-Cong Gou ◽  
Feng Wang
Keyword(s):  
Saddle Point ◽  
Excited States ◽  
Transition Probabilities ◽  
Radiative Transition ◽  
Oscillator Strengths ◽  
Doubly Excited States ◽  
Rotation Method ◽  
Resolution Electron ◽  
Doubly Excited ◽  
Theoretical Results

Energies and Auger widths of high-lying doubly-excited states 1s23lnl′ (n = 3–6) for Be-like neon are calculated using a saddle-point variational method and saddle-point complex-rotation method. The relativistic corrections and mass polarization are obtained with first-order perturbation theory. The configuration structure of the high-lying doubly-excited series is checked by relativistic perturbation corrections. The oscillator strengths and radiative transition probabilities are also calculated. Our results of energies and Auger widths are compared with the available theoretical results in the literature. Auger channel energies are compared with those from high-resolution electron spectroscopy. Excellent agreement is obtained in each state.

Fluorescence and Judd-Ofelt Analysis of Er3+ Doped CaF2 Transparent Ceramic

2014 ◽  
Vol 875-877 ◽  
pp. 23-27
Author(s):  
Ru Zhen Xing ◽  
Bing Chu Mei ◽  
Jing Hong Song ◽  
Xiao Nv Li
Keyword(s):  
Excited States ◽  
Cross Sections ◽  
Fluorescence Spectra ◽  
Room Temperature ◽  
Transition Probabilities ◽  
Radiative Transition ◽  
Transparent Ceramic ◽  
Ofelt Theory ◽  
Radiation Trapping ◽  
Intensity Parameters

In this paper, we evaluated the spectra parameters of Er3+.The absorption spectra of Er3+:CaF2transparent ceramic was measured at room temperature (RT). Based on the Judd–Ofelt theory, the intensity parameters were Ω2= 5.02×10−20cm2, Ω4= 3.40×10−20cm2and Ω6= 0.38×10−20cm2, and then the values of the radiative transition probabilities, radiative lifetimes and integrated emission cross-sections of excited states were calculated. Full width at half maximum (FWHM) of the fluorescence spectra for4I13/2→4I15/2transition was investigated, being 17nm. The decay time was found to be 24.3ms, which is longer than the theoretically calculated value indicating a radiation trapping effect in this work.

‘Excimer’ fluorescence - X. Spectral studies of 9-methyl and 9, 10-dimethyl anthracene

1966 ◽  
Vol 291 (1427) ◽  
pp. 570-582 ◽  
Keyword(s):  
Transition Probabilities ◽  
Entropy Change ◽  
Radiative Transition ◽  
Fluorescence Yield ◽  
Concentration Quenching ◽  
Spectral Studies ◽  
Quantum Yields ◽  
Excimer Fluorescence ◽  
Excimer Formation ◽  
Monomer Fluorescence

The monomer and excimer fluorescence spectra and quantum yields of solutions of 9-methyl anthracene and 9-10-dimethyl anthracene in several solvents were observed as a function of concentration and temperature ( T ). The monomer and excimer fluorescence quantum efficiencies, the molar excimer/monomer fluorescence yield K , and the Stern–Volmer concentration quenching parameter K' , were determined at room temperature. K was observed as a function of T , and the excimer binding energy B evaluated. At high T, K for a given solute is independent of the solvent, indicating that B , ∆ S , the entropy change on excimer formation, and ( k fD ) 0 /( k fM ) 0 , the ratio of the excimer and monomer radiative transition probabilities in vacuo , are solvent-independent molecular properties. It is proposed that the excimer structure of any compound is similar to that of two adjacent molecules in the crystal lattice, with a reduced intermolecular spacing, and that the excimer fluorescence polarization is that of the 1 L a — 1 A monomer fluorescence. This model accounts for the different types of photodimerization behaviour in the meso -substituted anthracenes. It is proposed that all concentration quenching in aromatic hydrocarbons is due to the formation of excimers and/or stable photodimers.

New measurements of SVL lifetimes and quantum yields in benzene vapor: Herzberg-Teller comparisons of radiative transition probabilities

1976 ◽  
Vol 17 (4) ◽  
pp. 377-389 ◽  
Author(s):  
William R. Ware ◽  
Alberto M. Garcia ◽  
C.S. Parmenter ◽  
M.D. Schuh ◽  
Kenneth Y. Tang
Keyword(s):  
Transition Probabilities ◽  
Radiative Transition ◽  
Benzene Vapor ◽  
Quantum Yields

scholarly journals RELATIVISTIC CALCULATION OF THE RADIATIVE TRANSITION PROBABILITIES AND LIFETIMES OF EXCITED STATES FOR THE RUBIDIUM ATOM IN A BLACK-BODY RADIATION FIELD

2021 ◽  
pp. 126-133
Author(s):  
P. Zaichko ◽  
A. Kuznetsova ◽  
A. Tsudik ◽  
V. Mansarliysky
Keyword(s):  
Radiation Field ◽  
Excited States ◽  
Transition Probabilities ◽  
Theoretical Data ◽  
Black Body ◽  
Radiative Transition ◽  
Relativistic Energy ◽  
Effective Lifetime ◽  
Rubidium Atom ◽  
Relativistic Calculation

We present the results of relativistic calculation of the radiative transition probabilities and excited states lifetimes for a heavy Rydberg atomic systems in a black-body (thermal) radiation field on example of the rubidium. As theoretical approach we apply the combined generalized relativistic energy approach and relativistic many-body perturbation theory with ab initio Dirac zeroth  approximation. There are obtained the calculational data for the radiative transition probabilities and excited states lifetimes, in particular, the rubidium atom in the Rydberg states with principal quantum number n=10-100. It is carried out the comparison of obtained theoretical data on the effective lifetime for the group of Rydberg  nS states of the rubidium atom at a temperature of T = 300K with experimental data as well as data of alternative theoretical calculation based on the improved quasiclassical model.  It is shown that the  accuracy of the theoretical data on the radiative transition probabilities and excited states lifetimes is provided by a correctness of the corresponding relativistic wave functions and accounting for the exchange-correlation effects.

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