Forbidden transition probabilities of astrophysical interest among low-lying states of V III

2007 ◽  
Vol 28 (2-3) ◽  
pp. 157-166 ◽  
Author(s):  
Andrei Irimia
Keyword(s):  
Transition Probabilities ◽  
Astrophysical Interest ◽  
Forbidden Transition

scholarly journals Committee 2: Transition Probabilities

1970 ◽  
Vol 14 (1) ◽  
pp. 127-128
Author(s):  
R. H. Garstang
Keyword(s):  
Transition Probabilities ◽  
Conference Report ◽  
Atomic Transition ◽  
National Bureau ◽  
Complete Coverage ◽  
Lifetime Measurements ◽  
Forbidden Transition ◽  
Beam Foil ◽  
Supply Information

A very great deal of work has been done during the last three years on the determination of atomic transition probabilities, and complete coverage here is impossible. Wiese and his staff at the National Bureau of Standards, Washington, have continued to collect all numerical results, and they can supply information as to what is available for any particular atom. They have published (1) a critical compilation of atomic transition probabilities for the atoms sodium to calcium (inclusive) in essentially the same way as an earlier compilation covered hydrogen to neon. At the time of writing a complete new bibliography is also in preparation (2), which will be published as NBS Special Publication 320 and which is complete up to June 1969. Review articles published include that of Layzer and Garstang (3) on theoretical allowed and forbidden transition probabilities, and the two volume conference report (4) covers beam foil spectroscopy (including lifetime measurements) in some detail. A fairly complete review of forbidden line transition probabilities was given by Garstang (5), where references to many original papers may be found. In the following we shall confine ourselves to mentioning a few areas of particular interest; detailed references can be traced through the bibliographies, reviews and abstracting journals.

scholarly journals Report on the recent advances performed in the determination of radiative parameters for spectral lines of astrophysical interest in heavy elements

2015 ◽  
Vol 11 (A29A) ◽  
Author(s):  
Pascal Quinet
Keyword(s):  
Atomic Physics ◽  
Periodic Table ◽  
Transition Probabilities ◽  
Spectral Lines ◽  
Heavy Elements ◽  
Radiative Lifetimes ◽  
Astrophysical Interest ◽  
The Past ◽  
Recent Advances

AbstractWe present an overview of the advances made during the past 15 years by the Atomic Physics and Astrophysics Group of Mons University regarding the analysis of the spectra, the transition probabilities, and the radiative lifetimes in heavy elements. More precisely, this review is focused on neutral and lowly ionized atoms belonging to the lanthanide group, the fifth row, and the sixth row of the periodic table (Z = 37–86), for which a very large amount of new data has been obtained.

scholarly journals The CHIANTI Database

2005 ◽  
Vol 13 ◽  
pp. 653-656 ◽  
Author(s):  
E. Landi ◽  
K.P. Dere ◽  
P.R. Young ◽  
M. Landini ◽  
H.E. Mason ◽  
...  
Keyword(s):  
Plasma Diagnostics ◽  
Transition Probabilities ◽  
Energy Levels ◽  
Radiative Transition ◽  
Atomic Energy ◽  
Astrophysical Interest ◽  
Future Developments ◽  
Synthetic Spectra ◽  
Atomic Energy Levels

AbstractThe CHIANTI database contains assessed atomic energy levels, wavelengths, radiative transition probabilities and excitation rates necessary to calculate line emissivities and synthetic spectra of a large number of ions of astrophysical interest. CHIANTI also includes a suite of programs to carry out plasma diagnostics. In the present paper we describe the contents of the CHIANTI database, its main applications and its future developments.

scholarly journals Interpretation of the spectrum of Pb(II). Theoretical transition probabilities and lifetimes

2001 ◽  
Vol 79 (7) ◽  
pp. 999-1009 ◽  
Author(s):  
C Colón ◽  
A Alonso-Medina
Keyword(s):  
Transition Probabilities ◽  
Energy Levels ◽  
Radiative Transition ◽  
Least Square ◽  
Large Contribution ◽  
Hartree Fock ◽  
Forbidden Transition ◽  
Method Of Least Square ◽  
Experimental Values ◽  
Good Agreement

Radiative transition probabilities for 190 lines arising from the ns 2S1/2, np 2P1/2,3/2, nd 2D3/2,5/2, nf 2F5/2,7/2, and 6p2 (4P1/2,3/2,5/2, 2D3/2,5/2, 2P1/2,3/2, and 2S1/2) levels of Pb(II) have been calculated. Lifetimes of the above mentioned levels have been determined from the present transition probabilities. These values were obtained in intermediate coupling (IC) and using ab initio relativistic Hartree-Fock calculations. For the IC calculations, we use the standard method of least-square fitting of experimental energy levels by means of computer codes from Cowan. The results of calculations for radiative transition probabilities and excited states lifetimes are presented and compared with the experimental results present in the literature and with other theoretical values. There is generally good agreement between our values and the experimental data available. Analysis of the interaction shows that the level 4P5/2 of the 6s6p2 configuration presents a large contribution to the 2D5/2 level of the 6s26d configuration. This result explains the good agreement between our result and the experimental values obtained to the observed as the 6s6p2 4P5/2 – 6s 25f2F7/2 dipole-forbidden transition. PACS Nos.: 32.70^*, 32.70Fw, 32.70Cs

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