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 Role of Beam Foil Spectroscopy in Understanding Basic Plasma Processes on the Sun

1990 ◽  
Vol 142 ◽  
pp. 439-440
Author(s):  
G. Krishnamurty ◽  
P. Meenakshi Raja Rao ◽  
P. Sarswathy ◽  
B.N. Raja Sekhar
Keyword(s):  
Quantitative Analysis ◽  
Spectral Line ◽  
Transition Probabilities ◽  
Radiative Transition ◽  
Decay Process ◽  
The Sun ◽  
Time Resolved ◽  
Beam Foil

Beam-Foil spectroscopy(BFS) has proved to be a valuable technique for the determination of radiative lifetimes of excited atomic levels leading to the evaluation of the transition probabilities. The time- resolved nature of the decay process in a collisionless environment is a unique characterstic of the beam-foil light source. The relevance of BFS to astrophysics comes from the importance of radiative transition probabilities in the quantitative analysis of optical spectra. Stellar abundances are obtained from the intensity of a spectral line which essentially is a product of the abundance of the element in the source and the probability of the transition. Thus the evaluation of accurate values of transition probabilities contribute significantly to stellar abundance analysis.

scholarly journals Working Group 2: Atomic Transition Probabilities

1979 ◽  
Vol 17 (1) ◽  
pp. 38-43
Author(s):  
W.L. Wiese
Keyword(s):  
Data Center ◽  
Working Group ◽  
Transition Probabilities ◽  
Atomic Transition ◽  
National Bureau ◽  
Critical Compilation ◽  
Group 2

The Data Center on Atomic Transition Probabilities at the National Bureau of Standards, Washington, D.C., has continued its bibliographical and critical compilation work on transition probabilities. A new general bibliography has been published, covering the literature references through October 1977 (1).

Determination of absolute atomic transition probabilities using time resolved optical pumping

1977 ◽  
Vol 21 (1) ◽  
pp. 116-120 ◽  
Author(s):  
L.R. Carlson ◽  
S.A. Johnson ◽  
E.F. Worden ◽  
C.A. May ◽  
R.W. Solarz ◽  
...  
Keyword(s):  
Optical Pumping ◽  
Transition Probabilities ◽  
Atomic Transition ◽  
Time Resolved

Accurate transition probabilities for the 2s2 1S - 2s2p 1P transition in Be I and B II

1999 ◽  
Vol 77 (2) ◽  
pp. 137-143 ◽  
Author(s):  
R E Irving ◽  
M Henderson ◽  
L J Curtis ◽  
I Martinson ◽  
P Bengtsson
Keyword(s):  
Decay Curve ◽  
Transition Probabilities ◽  
Theoretical Calculations ◽  
Transition Probability ◽  
Lifetime Measurements ◽  
Beam Foil

Transition probability determinations are reported for the 2s2 1S - 2s2p 1P transition in Be I and B II, based on lifetime measurements made by beam-foil excitation. The lifetimes were extracted by the ANDC method, which incorporates cascade-related decay curves into the analysis of the primary decay curve, thus accounting for the effects of cascade repopulation. The results are of higher precision than earlier measurements and improve the agreement with recent theoretical calculations. PACS No.: 32.70Cs

Determination of absolute transition probabilities in neutral cerium from branching ratio and lifetime measurements

1991 ◽  
Vol 8 (8) ◽  
pp. 1545 ◽  
Author(s):  
Scott E. Bisson ◽  
Earl F. Worden ◽  
John G. Conway ◽  
Brian Comaskey ◽  
John A. D. Stockdale ◽  
...  
Keyword(s):  
Transition Probabilities ◽  
Branching Ratio ◽  
Lifetime Measurements ◽  
Absolute Transition

Working Group 2: Atomic Transition Probabilities

1988 ◽  
Vol 20 (1) ◽  
pp. 117-123
Author(s):  
W. L. Wiese
Keyword(s):  
Data Center ◽  
Reference Data ◽  
Transition Probabilities ◽  
Transition Probability ◽  
Atomic Transition ◽  
National Bureau ◽  
Critical Data ◽  
Group 2 ◽  
Physical And Chemical ◽  
Near Future

The Data Center on Atomic Transition Probabilities at the National Bureau of Standards, Gaithersburg, Maryland, 20899, U.S.A. has continued its critical compilation work and maintains an up-to-date bibliographical data base. Work to revise and expand the existing NBS critical data compilations for the allowed and forbidden transitions in Fe-group elements, (Refs. A-D) has been completed. A single volume containing all these data for the Fe-group elements Sc to Ni is in press (Volume III of the NBS series of atomic transition probability tables) and is scheduled to be published in the near future, as a supplement to the Journal of Physical and Chemical Reference Data.

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