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J/A+AS/131/499   IRON Project XXIX. Boron isoelectronic sequence (Galavis+ 1998)
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)
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. 2s²3l) and for those affected by the avoided crossing
    of the 2s2p² ²S1/2 and ²P1/2 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:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
acds.dat          32     2254   Transition probabilities for ions with Z=6 to Z=28


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
                                           NEW TABLES (12-Nov-1998)
    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
                                           NEW TABLES (12-Nov-1998)
    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
    J/A+AS/147/111 : IRON Project XLIV    Fe VI trans. prob. & line ratio
    J/A+AS/147/253 : IRON Project XLV     Ar XIII, Fe XXI trans. probabilities
    J/A+A/365/268  : IRON Project XLVII   Ni III electron impact excitation
    J/A+A/372/1078 : IRON Project XLIX    Fe XX electron impact excitation
    J/A+A/372/1083 : IRON Project L       Fe XIX electron impact excitation
    J/A+A/394/753  : IRON Project LI      Fe IX electron impact excitation
    J/A+A/408/789  : IRON Project LIII    Fe XVII transition probabilities
    J/A+A/413/779  : IRON Project LIV     Fe XX transition probabilities
    J/A+A/420/763  : IRON Project LV      Ni II electron impact excitation
    J/A+A/437/345  : IRON Project LIX     Fe IV transition probabilities
    J/A+A/448/779  : IRON Project LXI     Fe IV radiative transitions
    J/A+A/457/721  : IRON Project LXII    Fe XVIII allowed and forbidden trans.
    J/A+A/466/763  : IRON Project LXIII   Fe¹⁹⁺ electron impact excitation


Byte-by-byte Description of file: acds.dat

   Bytes Format Units   Label     Explanations

   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


Acknowledgements: Martha Elena Galavis 


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
  2001A&A...365..258P : IRON Project XLVI   Fe X electron excitation
  2003A&A...401.1177C : IRON Project LII    Ni²⁴ electron excitation
  2005A&A...436.1123M : IRON Project LVII   Ni IV radiative transition rates
  2005A&A...433..717S : IRON Project LVIII  Fe XII electron impact excitation
  2006A&A...446..361W : IRON Project LX     Fe¹⁷⁺ electron impact excitation
(End)                                          Patricia Bauer [CDS]  13-Aug-1998
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