scholarly journals Electronic Structure of the Principal Uranium Centre in Alkali Fluorides

1986 ◽  
Vol 39 (4) ◽  
pp. 555 ◽  
Author(s):  
WA Runciman ◽  
B Srinivasan ◽  
S Saebo
Keyword(s):  
Electronic Structure ◽  
Excited States ◽  
Sodium Fluoride ◽  
Lithium Fluoride ◽  
Energy Levels ◽  
Similar Model ◽  
Hexavalent Uranium ◽  
Fitting Procedures ◽  
Charge Transfer Transitions ◽  
Good Agreement

Fluorescent centres are formed when hexavalent uranium is incorporated into lithium fluoride and sodium fluoride in an oxygen atmosphere. The principal centre is believed to consist of a UOsF group. Calculations have been made of the electronic structure of this centre assuming that the excited states are due to charge transfer transitions. Different models are considered and fitting procedures used to find parameters yielding good agreement with the energy levels and 9 values of the seven lowest excited states of the centre in sodium fluoride. A similar model is believed to be applicable to the principal centre in lithium fluoride.

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.

THE THIRD SPECTRUM OF RHODIUM (Rh III)

1966 ◽  
Vol 44 (4) ◽  
pp. 895-915 ◽  
Author(s):  
Laura Iglesias
Keyword(s):  
Electronic Structure ◽  
Previous Analysis ◽  
Energy Levels ◽  
The Third ◽  
New Energy ◽  
Theoretical Predictions ◽  
Electronic Configurations ◽  
Good Agreement

The description of the Rh III spectrum has been extended and a new study of its electronic structure has been made. As a result of this investigation a previous analysis has been corrected and 154 new energy levels from the electronic configurations 4d7, 4d65s, and 4d65p have been determined. These are in very good agreement with the theoretical predictions.

scholarly journals Theoretical Study of Isospin Mixing States with T> 0 in sd Even-Even N=Z Nuclei Using Shell Model

2021 ◽  
Vol 12 (2) ◽  
pp. 2470-2475
Author(s):  
Anwer A. Al-Sammarraie , Et. al.
Keyword(s):  
Shell Model ◽  
Excited States ◽  
Transition Probabilities ◽  
Energy Levels ◽  
Electric Quadrupole ◽  
Electric Quadrupole Transition ◽  
The Difference ◽  
Experimental Values ◽  
Mixing States ◽  
Good Agreement

Nuclear excited states with T > 0 in sd even-even N=Z  nuclei have been studied by using shell model. The calculations have employed the USDB Hamiltonian in order to predict the energy levels, the reduced electric quadrupole transition probabilities and reduced magnetic dipole transition probabilities. The study also include the average number of nucleons in each sd- active orbitals. The results compared with available experimental data.  The comparison showed a good agreement between theoretical and experimental energy sates for most of the states studied in this work. On the other hand there was a difference between theoretical and experimental values of transition probabilities, but it can be said that it remained within the acceptable range of the difference.

The electronic structure and magnetic properties of uranyl-like ions II. Plutonyl

1956 ◽  
Vol 238 (1212) ◽  
pp. 31-45 ◽  
Keyword(s):  
Aqueous Solution ◽  
Magnetic Properties ◽  
Absorption Spectrum ◽  
Electronic Structure ◽  
Energy Levels ◽  
Electronic Configuration ◽  
Resonance Absorption ◽  
Experimental Results ◽  
Microwave Resonance ◽  
Good Agreement

The electronic configuration and bonding in (PuO 2 ) 2+ are considered. The calculated energy levels can be correlated satisfactorily with the absorption spectrum of (PuO 2 ) 2+ in aqueous solution by a plausible choice of numerical parameters. The microwave resonance absorption and paramagnetic susceptibility are derived on the basis of the model, and are in good agreement with experimental results.

LIFETIMES AND STRUCTURE OF EXCITED STATES OF 73AS

1999 ◽  
Vol 08 (01) ◽  
pp. 17-38 ◽  
Author(s):  
D. BUCURESCU ◽  
I. CĂTA-DANIL ◽  
M. IVAŞCU ◽  
N. MĂRGINEAN ◽  
L. STROE ◽  
...  
Keyword(s):  
Excited States ◽  
Transition Probabilities ◽  
Energy Levels ◽  
Branching Ratios ◽  
Model Calculations ◽  
Fermion Model ◽  
Electromagnetic Moments ◽  
Spectroscopic Factors ◽  
Existing Data ◽  
Good Agreement

The lifetimes of twelve low spin excited states in 73 As , below 2 MeV excitation, have been measured with the DSA method in the 73 Ge ( p , n γ) reaction. The existing data (energy levels, electromagnetic moments, transition probabilities and branching ratios, one-nucleon transfer spectroscopic factors) are discussed in the frame of multi-shell interacting boson-fermion model calculations. A good agreement is obtained for a large number of levels.

scholarly journals Wavelengths, transition probabilities, and oscillator strengths for M-shell transitions in tungsten ions with partially filled 3p subshell

2017 ◽  
Vol 95 (3) ◽  
pp. 283-290 ◽  
Author(s):  
Min Xu ◽  
Anying Yan ◽  
Shuang Wu ◽  
Feng Hu ◽  
Xiangfu Li
Keyword(s):  
Excited States ◽  
Electric Dipole ◽  
Transition Probabilities ◽  
Energy Levels ◽  
Experimental Results ◽  
Oscillator Strengths ◽  
Calculated Energy ◽  
Good Agreement

Wavelengths, transition probabilities, and oscillator strengths have been calculated for M-shell electric dipole (E1) transitions in Al-like W61+ through Cl-like W57+, with partially filled 3p subshell. The fully relativistic multiconfiguration Dirac–Fock (MCDF) method, taking quantum electrodynamical effect and Breit correction into account, was used in the calculations. Calculated energy levels of M-shell excited states in Al-like through Cl-like W ions from the method were compared with some available theoretical and experimental results, and good agreement with them was achieved.

scholarly journals Configuration Mixing for Po Isotopes within the Interacting Boson Model-2

2021 ◽  
Vol 66 (7) ◽  
pp. 582
Author(s):  
L.A. Najam ◽  
S.N. Abood ◽  
F.M.A. Al-Jomaily
Keyword(s):  
Excited States ◽  
Energy Levels ◽  
Least Square ◽  
Interacting Boson Model ◽  
Shape Coexistence ◽  
Least Square Fit ◽  
Configuration Mixing ◽  
Boson Model ◽  
Experimental Values ◽  
Good Agreement

We analyze a sequence of 194−204Po isotopes, using the Configuration Mixing (CM) Interacting Boson Model 2 (IBM-2). We set the parameters of Hamiltonian using a least-square fit for the known energy levels, electrical transition rates B(E2), and quadruple moments Q(2+1) for the first excited states. We have a good agreement with the experimental values for all the observables tested, and we infer that the feature of the shape coexistence is concealed in the isotopes of Po, just as in the isotopes of Os and Pt.

Energy Levels and Electromagnetic Transition of 90-94mo Nuclei Using Ibm-1

2020 ◽  
pp. 149-152
Keyword(s):  
Experimental Data ◽  
Transition Probability ◽  
Energy Levels ◽  
Dynamical Symmetry ◽  
Interacting Boson Model ◽  
Excitation Energies ◽  
Electromagnetic Transition ◽  
Boson Model ◽  
Energy States ◽  
Good Agreement

The energy states for the J , b , ɤ bands and electromagnetic transitions B (E2) values for even – even molybdenum 90 – 94 Mo nuclei are calculated in the present work of "the interacting boson model (IBM-1)" . The parameters of the equation of IBM-1 Hamiltonian are determined which yield the best excellent suit the experimental energy states . The positive parity of energy states are obtained by using IBS1. for program for even 90 – 94 Mo isotopes with bosons number 5 , 4 and 5 respectively. The" reduced transition probability B(E2)" of these neuclei are calculated and compared with the experimental data . The ratio of the excitation energies of the 41+ to 21+ states ( R4/2) are also calculated . The calculated and experimental (R4/2) values showed that the 90 – 94 Mo nuclei have the vibrational dynamical symmetry U(5). Good agreement was found from comparison between the calculated energy states and electric quadruple probabilities B(E2) transition of the 90–94Mo isotopes with the experimental data .

Systematic calculations of energy levels and transitions rates in Mo XXVIII

2020 ◽  
Vol 75 (8) ◽  
pp. 739-747
Author(s):  
Feng Hu ◽  
Yan Sun ◽  
Maofei Mei
Keyword(s):  
Energy Levels ◽  
Oscillator Strengths ◽  
Atomic Data ◽  
Data Sets ◽  
Electron Systems ◽  
Excitation Energies ◽  
Experimental Values ◽  
Qed Effects ◽  
Hyperfine Structures ◽  
Good Agreement

AbstractComplete and consistent atomic data, including excitation energies, lifetimes, wavelengths, hyperfine structures, Landé gJ-factors and E1, E2, M1, and M2 line strengths, oscillator strengths, transitions rates are reported for the low-lying 41 levels of Mo XXVIII, belonging to the n = 3 states (1s22s22p6)3s23p3, 3s3p4, and 3s23p23d. High-accuracy calculations have been performed as benchmarks in the request for accurate treatments of relativity, electron correlation, and quantum electrodynamic (QED) effects in multi-valence-electron systems. Comparisons are made between the present two data sets, as well as with the experimental results and the experimentally compiled energy values of the National Institute for Standards and Technology wherever available. The calculated values including core-valence correction are found to be in a good agreement with other theoretical and experimental values. The present results are accurate enough for identification and deblending of emission lines involving the n = 3 levels, and are also useful for modeling and diagnosing plasmas.

Sign in / Sign up

Export Citation Format

Share Document