Atomic transition probabilities for vanadium, chromium, and manganese (a critical data compilation of allowed lines)

Abstract

Atomic transition probabilities for about 2700 spectral lines of the elements vanadium, chromium, and manganese through all stages of ionization have been critically evaluated and compiled. All available literature sources have been utilized. Systematic trends along isoelectronic sequences have been extensively exploited to predict oscillator strengths (f-values) whenever no data were available in the literature. The data are presented in separate tables for each element and stage of ionization and ,are arranged according to multiplets and, when appropriate, also to 'transition arrays and increasing quantum numbers. For each line, the transition probability for spontaneous emission, the absorption oscillator strength, and the line strength are given, along with the spectroscopic designation, the wavelength, the statistical weights, and the energy levels (when available) of the upper and lower atomic states. In addition, the estimated accuracy and the literature reference are indicated. In short introductions, which precede the tables for each spectrum, the main justifications for the choice of the adopted data and for the accuracy rating are discussed. A general introduction contains some more details on our evaluation procedure.

Chemiluminescence in the Reaction of Mn Atoms with CF4

“…[22][23][24] For the blue channel, however, the e 6 D J f z 6 P J (∼446 nm), z 4 D J f a 4 D J In each case the normalization is the same as in Figure 3, and the curve corresponds to the best MLC fit to Y(ET 0 ), assuming two processes.…”

Elemental abundance analyses with DAO spectrograms

“…As improved gf values have become available, these more accurate values have been used. Some important substitutions have been Wiese et al (1996) for C, N, and O replacing those of earlier NIST (NBS) publications, Lanz & Artru (1985) for Si II multiplets 1 and 3 replacing those of Wiese et al (1969), Lawler & Dakin (1989) for Sc II replacing those of of Martin et al (1988) which replaced those of Wiese & Fuhr (1975), Biemont et al (1989) for V II replacing those of Martin et al (1988) which replaced those of Younger et al (1978), and Martin et al (1988) and Fuhr et al (1988) replacing those of various previous studies for many iron peak element lines. The shift in the studied spectral region between the spectra obtained photographically and with the electronic detectors might result in slight systematic errors as the gf value quality is somewhat wavelength dependent.…”

Hyperfine structure, lifetime and oscillator strength of V II

“…For comparison of all lifetime data available in the literature we include in Table 3, lifetime measurements of 12 odd-parity levels of V II performed by the time-resolved observation of the reemitted fluorescence after pulsed laser excitation [8] together with the values obtained by Kurucz [14], from the averaged f-values of the NBS compilation of Younger, Fuhr et al [15] based on lifetime measurements with the beam foil technique [16]. We gather in this table also those given by Schade et al [17], Den Hartog et al [18], Biémont et al [19] and Xu et al [20] and those obtained by means of ab initio calculations using Cowan code [21,22].…”