J/A+AS/143/483 IRON Project XLII. Fe XXI (Butler+, 2000) ================================================================================ Atomic data from the IRON Project. XLII: Electron impact excitation of Fe XXI. Butler K., Zeippen C.J. =2000A&AS..143..483B ================================================================================ ADC_Keywords: Atomic physics Keywords: atomic data - atomic processes Description: Effective collision strengths for transitions between 52 fine structure states calculated in a Breit-Pauli approximation are provided in ups.dat. Results are provided for logT in the range of 3.0-7.4 in steps of 0.1. The level indices refer to the ordering given in Table 2 text where the energies are also given. The format is most easily described by the fortran program provided - readups.f - which may be used to interface with user programs. Oscillator strengths for all dipole allowed transitions are provided in osc.dat which are also indexed with respect to Table 2. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table2.dat 39 52 Calculated versus observed target energies table4.dat 38 34 Transition probabilities for 2s^2^2p^2^-2s2p^3^ lines osc.dat 35 348 Comparison of oscillator strengths ups.dat 91 8958 Effective collision strengths readups.f 60 37 Fortran program to read ups.dat -------------------------------------------------------------------------------- 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/131/499 : IRON Project XXIX Boron isoelectronic sequence 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 fine-structure transitions 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 probabiliti 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 Fe^19+^ electron impact excitation Byte-by-byte Description of file: table2.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 2 I2 --- Index [1,52] Index 4- 10 I7 cm-1 Ecalc ? Calculated target energy 12- 18 I7 cm-1 Eobs Observed (Corliss & Sugar, 1982, J. Phys. Chem. Ref. Data 11, 135) target energy 20- 39 A20 --- Term Term -------------------------------------------------------------------------------- Byte-by-byte Description of file: table4.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 8 A8 --- Upper Upper term of transition 10- 17 A8 --- Lower Lower term of transition 20- 28 E9.3 --- TP This work transition probability 30- 38 E9.3 --- TPFFS Froese, Fischer & Saha (1995, Phys. Scr. 32, 181) transition probability -------------------------------------------------------------------------------- Byte-by-byte Description of file: osc.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 2- 5 I4 --- iu [1,52] Index of upper level 6- 9 I4 --- il [1,52] Index of lower level 15- 23 E9.3 --- gf1 Oscillator strength from this work 26- 34 E9.3 --- gf2 Oscillator strength from Aggarwal et al. (1997ApJS..108..575A) -------------------------------------------------------------------------------- Acknowledgements: Keith Butler 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 Ni^24^ 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 Fe^17+^ electron impact excitation ================================================================================ (End) Patricia Bauer [CDS] 04-May-2000