Transition probabilities and oscillator strengths of E1 transitions in Fe XII and Fe XIV

Journal Article · Thu Sep 15 04:00:00 EDT 2011 · Atomic Data and Nuclear Data Tables

DOI:https://doi.org/10.1016/j.adt.2011.03.002· OSTI ID:21592591

Non-orthogonal orbitals in the multiconfiguration Hartree-Fock approach are used to calculate line strengths, oscillator strengths and transition probabilities for E1 transitions among the fine-structure levels of the 3s{sup 2}3p{sup 3}, 3s3p{sup 4}, 3s{sup 2}3p{sup 2}3d, 3s3p{sup 3}3d, 3p{sup 5} and 3s{sup 2}3p3d{sup 2} configurations in Fe XII and 3s{sup 2}3p, 3s3p{sup 2}, 3s{sup 2}3d, 3p{sup 3}, 3s3p3d, 3p{sup 2}3d, 3s3d{sup 2}, 3p3d{sup 2}, 3s{sup 2}4s, 3s{sup 2}4p, 3s3p4s and 3s{sup 2}4d configurations in Fe XIV. The lifetimes of excited levels belonging to these configurations of Fe XII and Fe XIV are also presented. An accurate representation of the levels has been obtained using spectroscopic and correlation radial functions. The wavefunctions exhibit large correlations and significant dependence of one-electron valence orbitals due to both the total and intermediate terms. The relativistic corrections are included through the one-body and two-body operators in the Breit-Pauli Hamiltonian. Progressively larger calculations are performed to check for important electron correlation contributions and for convergence of results. The atomic wavefunctions give excitation energies which are in close agreement with experiment. The present oscillator strengths and transition probabilities compare very well with previous large scale calculations. - Highlights: {yields} Fe XII and Fe XIV oscillator strengths and transition probabilities for E1 transitions. {yields} Energies and lifetimes of excited levels of Fe XII and Fe XIV. {yields} Multiconfiguration Hartree-Fock calculations with non-orthogonal radial functions.

• OSTI ID: 21592591
• Journal Information: Atomic Data and Nuclear Data Tables, Journal Name: Atomic Data and Nuclear Data Tables Journal Issue: 5 Vol. 97; ISSN ADNDAT; ISSN 0092-640X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
APPROXIMATIONS
CALCULATION METHODS
COMPARATIVE EVALUATIONS
CONVERGENCE
CORRELATIONS
E1-TRANSITIONS
ELECTRON CORRELATION
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EVALUATION
EXCITATION
EXCITED STATES
FINE STRUCTURE
FUNCTIONS
HAMILTONIANS
HARTREE-FOCK METHOD
IRON
LIFETIME
MANY-BODY PROBLEM
MATHEMATICAL OPERATORS
METALS
MULTIPOLE TRANSITIONS
NUCLEAR DATA COLLECTIONS
OSCILLATOR STRENGTHS
PROBABILITY
QUANTUM OPERATORS
RELATIVISTIC RANGE
TRANSITION ELEMENTS
TWO-BODY PROBLEM
WAVE FUNCTIONS