scholarly journals Oscillator-strength enhancement of electric-dipole-forbidden transitions in evanescent light at total reflection

2005 ◽  
Vol 71 (1) ◽  
Author(s):  
Satoshi Tojo ◽  
Masahiro Hasuo
Keyword(s):  
Oscillator Strength ◽  
Electric Dipole ◽  
Total Reflection ◽  
Strength Enhancement ◽  
Forbidden Transitions ◽  
Evanescent Light

Electric-dipole forbidden transitions for probing atomic state preparation: the case of the Autler-Townes effect

2021 ◽  
Author(s):  
Fernando Ramirez-Martinez ◽  
Francisco Sebastian Ponciano Ojeda ◽  
Santiago Hernandez-Gomez ◽  
Alberto Del Angel Medina ◽  
Cristian Adrián Moijca-Casique ◽  
...  
Keyword(s):  
Electric Dipole ◽  
Atomic State ◽  
State Preparation ◽  
Forbidden Transitions

scholarly journals Laser spectroscopy of the 5P3/2 → 6Pj (j = 1/2 and 3/2) electric dipole forbidden transitions in atomic rubidium

2018 ◽  
Author(s):  
F. Ponciano-Ojeda ◽  
S. Hernández-Gómez ◽  
C. Mojica-Casique ◽  
L. M. Hoyos ◽  
J. Flores-Mijangos ◽  
...  
Keyword(s):  
Laser Spectroscopy ◽  
Electric Dipole ◽  
Forbidden Transitions

Electric-dipole forbidden transitions in C60: oscillator strengths induced by the spin–orbit coupling

2002 ◽  
Vol 589-590 ◽  
pp. 139-145 ◽  
Author(s):  
Toshiki Hara ◽  
Yasushi Nomura ◽  
Susumu Narita ◽  
Hirotoshi Ito ◽  
Tai-ichi Shibuya
Keyword(s):  
Electric Dipole ◽  
Orbit Coupling ◽  
Oscillator Strengths ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Forbidden Transitions

scholarly journals How much better are InGaN/GaN nanodisks than quantum wells—Oscillator strength enhancement and changes in optical properties

2014 ◽  
Vol 104 (5) ◽  
pp. 051116 ◽  
Author(s):  
Lei Zhang ◽  
Leung-Kway Lee ◽  
Chu-Hsiang Teng ◽  
Tyler A. Hill ◽  
Pei-Cheng Ku ◽  
...  
Keyword(s):  
Optical Properties ◽  
Quantum Wells ◽  
Oscillator Strength ◽  
Strength Enhancement

scholarly journals A Laboratory Astrophysics Problem: The Lifetime of Very Long-Lived Levels in Low-Charge Ions

Atoms ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 21 ◽  
Author(s):  
Elmar Träbert
Keyword(s):  
Electric Dipole ◽  
Experimental Approach ◽  
Laboratory Astrophysics ◽  
Emission Lines ◽  
Transition Rates ◽  
Line Intensities ◽  
Forbidden Transitions ◽  
Singly Charged ◽  
Low Charge ◽  
Charged Ions

Emission lines of singly charged ions populate many astrophysical spectra. However, the interpretation of the line intensities (usually line ratios) often depends on the transition rates of the decays of very long-lived low-lying levels. For example, the line ratio of two electric-dipole forbidden transitions in the 3s 2 3p 3 ground configuration of singly ionized sulfur (ion S + , spectrum S II) has been interpreted in terms of a density diagnostic for planetary nebulae, i.e., for densities in the order of 10 4 cm − 3 . The predicted lifetimes of the 2 D 3 / 2 , 5 / 2 o levels are in the order of one hour. Modeling indicates that a 10% uncertainty of the lifetime determination in this case corresponds to a 50% uncertainty of the density diagnostic. The available theoretical lifetime predictions scatter by much more than 10%. Considerations about an experimental approach are presented with the goal of instigating a measurement of the actual level lifetimes.

Calculation of Wavelengths, Transition Probabilities and Oscillator Strengths for E1 and M1 Transitions in Cu-Like Au Ion

2015 ◽  
Vol 723 ◽  
pp. 799-803
Author(s):  
Min Xu
Keyword(s):  
Excited States ◽  
Magnetic Dipole ◽  
Configuration Interaction ◽  
Electric Dipole ◽  
Transition Probabilities ◽  
Energy Levels ◽  
Oscillator Strengths ◽  
Forbidden Transitions ◽  
Calculation Results ◽  
Good Agreement

Wavelengths, transition probabilities and oscillator strengths have been calculated for electric dipole (E1) transitions and magnetic dipole (M1) transitions in Cu-like Au ion. These values are obtained in the configuration interaction (CI) and using the fully relativistic multiconfiguration Dirac-Fock (MCDF) method including quantum electrodynamical (QED) effect and Breit correction. Obtained energy levels of some excited states in Cu-like Au ion from the method are generally in good agreement with valuable theoretical and experimental results. The calculation results indicate that for high-Z highly ionized atom, some forbidden transitions are very important.

scholarly journals Calculation and Comparison of Energy Interaction and Intensity Parameters for the Interaction of Nd(III) with DL-Valine, DL-Alanine and β-Alanine in Presence and Absence of Ca2+/Zn2+ in Aqueous and Different Aquated Organic Solvents Using 4f-4f Transition Spectra as Probe

2009 ◽  
Vol 2009 ◽  
pp. 1-9 ◽  
Author(s):  
H. Debecca Devi ◽  
Ch. Sumitra ◽  
Th. David Singh ◽  
N. Yaiphaba ◽  
N. Mohondas Singh ◽  
...  
Keyword(s):  
Amino Acids ◽  
Oscillator Strength ◽  
Organic Solvents ◽  
Electric Dipole ◽  
Spectral Energy ◽  
Ligand Interaction ◽  
Energy Parameters ◽  
Energy Interaction ◽  
Intensity Parameters ◽  
Presence And Absence

Absorption difference and comparative absorption spectrophotometric studies involving 4f-4f transitions of Nd(III) and different amino acids: DL-valine, DL-alanine, and β-alanine in presence and absence of Ca(II) and Zn(II) in aqueous and different aquated organic solvents have been carried out. Variations in the spectral energy parameters: Slater-Condon (FK) factor, Racah (EK), Lande factor (ξ4f), nephelauxetic ratio (β), bonding (b1/2), percentage covalency (δ) are calculated to explore the mode of interaction of Nd(III) with different amino acids: DL-valine, DL-alanine, and β-alanine. The values of experimentally calculated oscillator strength (P) and computed values of Judd-Ofelt electric dipole intensity parameters, Tλ (λ = 2,4,6), are also determined for different 4f-4f transitions. The variation in the values of P and Tλ parameters explicitly shows the relative sensitivities of the 4f-4f transitions as well as the specific correlation between relative intensities, ligand structures, and nature of Nd(III)-ligand interaction.

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