Probing of alignment and orientation using electric-dipole-forbidden transitions

1993 ◽  
Vol 89 (10) ◽  
pp. 1551 ◽  
Author(s):  
Craig A. Taatjes ◽  
Steven Stolte
Keyword(s):  
Electric Dipole ◽  
Forbidden Transitions

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 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.

Recent Radiative and Collisional Atomic Data of Astrophysical Interest

1988 ◽  
Vol 102 ◽  
pp. 129-132
Author(s):  
K.L. Baluja ◽  
K. Butler ◽  
J. Le Bourlot ◽  
C.J. Zeippen
Keyword(s):  
Mass Production ◽  
Bound States ◽  
Physical Models ◽  
Impact Excitation ◽  
Electron Impact Excitation ◽  
Atomic Data ◽  
Isoelectronic Sequence ◽  
Astrophysical Interest ◽  
Radiative Transitions ◽  
Forbidden Transitions

SummaryUsing sophisticated computer programs and elaborate physical models, accurate radiative and collisional atomic data of astrophysical interest have been or are being calculated. The cases treated include radiative transitions between bound states in the 2p4and 2s2p5configurations of many ions in the oxygen isoelectronic sequence, the photoionisation of the ground state of neutral iron, the electron impact excitation of the fine-structure forbidden transitions within the 3p3ground configuration of CℓIII, Ar IV and K V, and the mass-production of radiative data for ions in the oxygen and fluorine isoelectronic sequences, as part of the international Opacity Project.

Electric dipole and quadrupole moment and dipole polarizability of CS, SiO and SiS

2000 ◽  
Vol 98 (8) ◽  
pp. 481-491 ◽  
Author(s):  
George Maroulis, Constantinos Makris, Deme
Keyword(s):  
Quadrupole Moment ◽  
Electric Dipole ◽  
Dipole Polarizability
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