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J/A+AS/131/499 IRON Project XXIX. Boron isoelectronic sequence (Galavis+ 1998)
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Atomic data from the IRON Project. XXIX. Radiative rates for transitions within
the n=2 complex in ions of the boron isoelectronic sequence
Galavis M.E., Mendoza C., Zeippen C.J.
<Astron. Astrophys. Suppl. Ser. 131, 499 (1998)>
=1998A&AS..131..499G (SIMBAD/NED BibCode)
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ADC_Keywords: Atomic physics
Keywords: atomic data - atomic process
Abstract:
As part of the IRON Project, radiative rates have been calculated for
the E1, E2 and M1 transitions within the n=2 complex in ions of the
boron isoelectronic sequence (6<=Z<=28). The computations have been
carried out with the atomic structure code SUPERSTRUCTURE which
facilitates the generation of extended radiative datasets including
configuration interaction, Breit-Pauli relativistic contributions and
semi-empirical term-energy corrections. By means of extensive
comparisons with the available datasets for this sequence, with
detailed single-ion calculations and recent experiments, we have been
able to assign accuracy ratings to the present A-values. We find that
in general the spin-allowed and spin-forbidden E1 transitions are
accurate to 10% and 20%, respectively, except for a few transitions in
ions with Z<=7 that are perturbed by admixture with low-lying n=3
states (e.g. 2s^2^3l) and for those affected by the avoided crossing
of the 2s2p^2^ ^2^S1/2 and ^2^P1/2 which takes place at Z~22. It is
concluded that, statistically, the present dataset is the most
accurate to date for this astrophysically relevant sequence.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
acds.dat 32 2254 Transition probabilities for ions with Z=6 to Z=28
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See also:
J/A+AS/103/273 : IRON Project II IR collision strengths of C-like ions
J/A+A/283/319 : IRON Project III B-like ions
J/A+AS/108/1 : IRON Project V Collision strengths of O-like ions
J/A+A/293/953 : IRON Project VI Fe II collision strengths
J/A+A/293/967 : IRON Project VII Fe II radiative transitions
J/A+AS/109/193 : IRON Project VIII Electron excitation of Ti-like ions
J/A+AS/119/509 : IRON Project XVII Radiative transition in Fe III
J/A+AS/119/523 : IRON Project XVIII Electron impact for Fe III
J/A+AS/120/361 : IRON Project XIX Fe II radiative transitions
J/A+AS/123/159 : IRON Project XXII C and O radiative rates
J/A+AS/123/575 : IRON Project XXIII Fe XXII excitation rate coefficients
J/A+AS/126/373 : IRON Project XXVII Fe IV collision strengths
J/A+AS/131/153 : IRON Project XXXI Fe XII electron excitation
J/A+AS/135/347 : IRON Project XXXV Fe XXIV & Fe XXV oscillator strengths
J/A+AS/136/395 : IRON Project XXXVII Fe VI collision strengths
J/A+AS/137/165 : IRON Project XXXVIII Fe XV electron excitation
J/A+AS/143/483 : IRON Project XLII Fe XXI electron impact excitation
J/A+AS/144/141 : IRON Project XLIII Fe V transition probabilities
Byte-by-byte Description of file: acds.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Z Atomic number
4- 12 A9 --- Ion Ion
14- 17 I4 --- j j level
19- 21 I3 --- i i level
23- 32 E10.3 s-1 Aij Transition probability
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Acknowledgements: Martha Elena Galavis <mgalavis@pion.ivic.ve>
References:
1993A&A...279..298H : IRON Project I Goal and methods
1994A&AS..107...29S : IRON Project IV Electron excitation of F-like ions
1995A&AS..110..209P : IRON Project IX Electron excitation of Cl-like ion
1995A&AS..111..347G : IRON Project X Si- & S-like ions IR coll. strengths
1996A&AS..115..151S : IRON Project XI Ar VI, K VII & CaVIII fine-structure
1995A&AS..114..367B : IRON Project XII V-like ions electron excitation
1996A&AS..115..551B : IRON Project XIII Ni II & Fe II electron excitation
1996A&A...309..677S : IRON Project XIV Fe XIV fine-structure transition
1996A&AS..118..157K : IRON Project XV He II & Fe XXVI Electron excitation
1996A&AS..119..105B : IRON Project XVI Fe V oscillator strengths
1997A&AS..122..167B : IRON Project XX Fe I oscillator strengths
1997A&AS..122..177P : IRON Project XXI Fe I fine-structure transition
1997A&AS..126..105B : IRON Project XXIV Fe XXIV electron excitation
1998A&AS..127..545B : IRON Project XXV Fe XII electron excitation
1997A&AS..126..365B : IRON Project XXVI Fe IV oscillator strengths
1998A&AS..129..161B : IRON Project XXVIII F-like ions fine-structure trans.
1999A&AS..134..369S : IRON Project XXX P III, S IV & Cl V collision data
1998A&AS..133..245G : IRON Project XXXII Ar III effective collision strength
1999A&AS..135..159M : IRON Project XXXIII Carbon radiative rates
1999A&AS..136..385E : IRON Project XXXIV Fe XVI electron impact excitation
1999A&AS..137..175C : IRON Project XXXVI Fe XXIII electron excitation
1999A&AS..137..529B : IRON Project XXXIX Ni II oscillator strengths
2000A&AS..141..285S : IRON Project XL Fe XIV electron excitation
2000A&AS..142..313B : IRON Project XLI Fe VII electron excitation
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(End) Patricia Bauer [CDS] 13-Aug-1998