The Iron Project

The primary aim of the Iron Project is to compute collisional data for the iron-peak elements in various ionization stages. The first two phases of the project deal with fine structure transitions along several isoelectronic sequences and for all iron ions. Radiative data for a number of ions (e.g. low ionization stages of iron ions, Fe I - V), is also being computed to higher accuracy than in the earlier work from the Opacity Project (see PHOTOIONIZATION).

The Iron Project , IP Papers

A Brief Review, In Proceedings of the Symposium on Atomic Data Needs for X-Ray Astronomy, NASA GSFC, Dec, 16-17, 1999 : THE IRON PROJECT

IRON Project Papers as of October 2005

Atomic data from the IRON Project:

I. Goals and methods. D.G.Hummer, K.A.Berrington, W.Eissner, Anil K. Pradhan, H.E.Saraph, J.A.Tully, A&A 279, 298-309, 1993

II. Effective collision strengths for infrared transitions in carbon-like ions. D.J.Lennon, V.M.Burke, A&A Suppl. Ser. 103, 273-277, 1994

III. Rate coefficients for electron impact excitation of Boron-like ions: Na VI, Mg VIII, Al IX, Si X, S X, Ar XIV, Ca XVI and Fe XXII, Hong Lin Zhang, Mark Graziani and Anil K. Pradhan, A&A 283, 319-330, 1994

IV. Electron excitation of the 2P(3/2)-2P(1/2) fine structure transition in fluorine-like ions. H.E.Saraph, J.A.Tully, A&A Suppl. Ser. 107, 29-38,1994

V. Effective collision strengths for transitions in the ground configuration of oxygen-like ions. K.Butler, C.J.Zeippen, A&A Suppl. Ser. 108, 1, 1994

VI. Collision strengths and rate coefficients for Fe II. Hong Lin Zhang and Anil K.Pradhan, A&A 293, 953, 1995

VII. Radiative transition probabilities for Fe II. Sultana N. Nahar, A&A 293, 967, 1995

VIII. Electron excitation of the 3d^4 ^5Dj ground state fine structure transition in Ti-like ions V II, Cr III, Mn IV, Fe V, Co VI and Ni VII. K.A. Berrington, A&A Suppl. Ser. 109, 193, 1995

IX. Electron excitation of the ^2P0 3/2-1/2 fine structure transitions in chlorine-like ions from Ar II to Ni XII. J.C.Pelan and K.A.Berrington, A&A Suppl. Ser. 110, 209, 1995

X. Effective collision strengths for infrared transitions in silicon- and sulphur-like ions. M.E.Galavis, C.Mendoza and C.J.Zeippen, A&A Suppl. Ser. 111, 347, 1995

XI. The 2P_{1/2-3/3} fine-structure lines of Ar VI, K VII and Ca VIII. H.E.Saraph and P.J.Storey, A&A Suppl. Ser. 115, 151, 1996.

XII. Electron excitation of forbidden transitions in V-like ions Mn III, Fe IV, Co V, and Ni VI. K.A.Berrington and J.C. Pelan, A&A Suppl. Ser. 114, 367, 1995.

XIII. Electron excitation rates and emissivity ratios for forbidden transitions in Ni II and Fe II. M.A.Bautista and A.K.Pradhan, A&A Suppl. Ser. 115, 551, 1996

XIV. Electron impact excitation for the Fe XIV fine-structure transition ^2P^0_1/2 - ^2P^0_3/2, P.J.Storey, H.E.Mason, and H.E.Saraph, A&A Suppl. Ser. 309, 677, 1996.

XV. Electron excitation of the fine-structure transitions in hydrogen-like ions He II and Fe XXVI, R. Kisielius, K.A.Berrington, and P.H.Norrington, A&A Suppl. Ser. 118, 157, 1996.

XVI. Photoionization cross sections and oscillator strengths for Fe V, Manuel A. Bautista, A&A Suppl. Ser. 119, 105, 1996.

XVII. Radiative transition probabilities for dipole allowed and forbidden transitions in Fe III", Sultana N. Nahar and Anil K. Pradhan, A&A Suppl. Ser. 119, 507, 1996.

XVIII. Electron impact excitation collision strengths and rate coefficients for Fe III", Hong Lin Zhang, A&A Suppl. Ser. 119, 523, 1996.

XIX. Radiative transition probabilities for forbidden lines in Fe II, P. Quinet, M.Le Dourneuf, C.J.Zeippen, A&A Suppl. Ser. 120, 361, 1996

XX. Photoionization cross sections and oscillator strengths for Fe I, Manuel A. Bautista, A&A Suppl. Ser. 122, 167, 1997

XXI. Electron excitation of fine-structure transitions involving the 3d^6 4s^2 ^5D ground state and the 3d^7 4s ^5F metastable state of Fe I, J. Pelan and K. A. Berrington, A&A Suppl. Ser. 122, 177, 1997

XXII. Radiative rates for forbidden transitions within the ground state configurations of ions in the carbon and oxygen isoelectronic sequences, M.E.Galavis, C. Mendoza and C.J.Zeippen, A&A Suppl. Ser. 123, 159, 1997

XXIII. Relativistic excitation rate coefficients for Fe XXII with inclusion of radiation damping, Hong Lin Zhang and Anil K. Pradhan, A&A Suppl. Ser. 123, 575, 1997

XXIV. Electron excitation of Li-like Fe XXIV between the n=2 and n'=2,3,4 fine-structure levels, K.A.Berrington and J.A.Tully, A&A Suppl. Ser. 126, 105, 1997

XXV. Electron impact excitation of fine-structure transitions in the ground state configuration of Fe XII, A.M.Binello, H.E.Mason and P.J.Storey, A&A Suppl. Ser. 127, 545, 1998

XXVI. Photoionization cross sections and oscillator strengths for Fe IV, Manuel A. Bautista and Anil K. Pradhan, A&A Suppl. Ser. 126, 365, 1997

XXVII. Electron impact excitation collision strengths and rate coefficients for Fe IV, Hong Lin Zhang and Anil K. Pradhan, A&A Suppl. Ser. 126, 373, 1997

XXVIII. Electron excitation of the ^2P_3/2 --> ^2P_1/2 fine structure transition in fluorine-like ions at higher temperatures, K.A. Berrington, H.E. Saraph and J.A. Tully, A&A Suppl. Ser. 129, 161, 1998

XXIX. Radiative rates for transitions within the n=2 complex in ions of the boron isoelectronic sequence, M.E.Galavis, C.Mendoza and C.J.Zeippen A&A Suppl. Ser. 131, 499, 1998

XXX. Collisional rates for the ^2P^o_1/2 - ^2P^o_3/2 fine-structure lines of P III, S IV and Cl V, H.E. Saraph and P.J. Storey, A&A Suppl. Ser. 134, 369, 1999.

XXXI. Electron impact excitation of optically allowed and intercombination electric dipole transitions in Fe XII, A.M.Binello, H.E. Mason and P.J. Storey, A&A Suppl. Ser. 131, 153, 1998

XXXII. On the accuracy of the effective collision strength for the electron impact excitation of the quadrupole transition in Ar III, M.E.Galavis, C.Mendoza and C.J.Zeippen, A&A Suppl. Ser. 133, 326, 1998

XXXIII. Radiative rates for the intercombination transitions in the carbon isoelectronic sequence, C. Mendoza, C.J. Zeippen and P.J. Storey, A&A Suppl.Ser. 135, 159, 1999.

XXXIV. Electron impact excitation of Fe XVI, W. Eissner, M.E. Galavis, C. C. Mendoza and C.J. Zeippen, A&A Suppl. Ser. 136, 385, 1999

XXXV. Relativistic fine structure oscillator strengths for Fe XXIV and Fe XXV, Sultana N. Nahar and Anil K. Pradhan, A&A Suppl. Ser. 135, 347, 1999

XXXVI. Electron excitation of Be-like Fe XXIII between 1s^2 2l_1 2l_2 SLJ and 1s^2 2l_3 2l_4 S'L'J', M.C. Chidichimo, V. Zeman, J.A. Tully and K.A. Berrington, A&A Suppl. Ser. 137, 175, 1999

XXXVII. Electron impact excitation collision strenths and rate coefficients for Fe VI, Guo Xin Chen and Anil K. Pradhan, A&A Suppl. Ser. 136, 395, 1999

XXXVIII. Electron Impact excitation of fine-structure transitions in the n=3 complex of Fe XV, W. Eissner, M.E. Galavis, C. Mendoza and C.J.Zeippen, 137,165,1999

XXXIX. Photoionization Cross Sections and Oscillator STrengths for Ni II, Manuel A. Bautista, A&A Suppl. Ser. 137, 529, 1999

XL. Electron impact excitation of the Fe XIV EUV transitions, P.J. Storey, H.E.Mason and P.R.Young, A&A Suppl. Ser. 141, 285, 2000

XLI. Electron excitation rates among the 3d^2 fine-structure levels of Ca-like Fe VII, K.A.Berrington, S.Nakazaki and P.H.Norrington, A&A Suppl. Ser. 142, 313, 2000

XLII. Electron impact excitation of Fe XXI, K.Butler and C.J.Zeippen, A&A Suppl. Ser. 143, 483, 2000

XLIII. Transition Probilities for Fe V, S.N.Nahar, F.Delahaye, Anil. K. Pradhan and C.J.Zeippen, A&A Suppl. Ser. 144,141, 2000

XLIV. Transition probabilities and line rations for FeVI with fluorescent excitation in planetary nebulae, Guo Xin Chen and Anil K. Pradhan, A&A Suppl. Ser. 147, 111, 2000

XLV. Relativistic transition probabilities for carbon-like Ar XIII and Fe XXI using Breit-Pauli R-matrix method, Sultana N. Nahar, A&A Suppl. Ser. 147, 253, 2000

XLVI. Electron excitation of 3s3p^6 and 3s^23p^43d fine-structure transitions in Fe X, John C. Pelan and Keith A. Berrington, A&A, 365, 258, 2001.

XLVII. Electron Impact Excitation of NiIII, Manuel A. Bautista, A&A, 365, 268, 2001.

XLVIII. Electron excitation of the 2s2p^6 and 2s^22p^43l fine-structure transitions of Fe XVIII, Keith A. Berrington and John C. Pelan, A&A, 365, 258, 2001.

XLIX. Electron impact excitation of Fe XX, K.Butler and C.J.Zeippen, A&A, 372, 1078, 2001.

L. Electron impact excitation of Fe XIX, K. Butler and C.J. Zeippen, A&A, 372, 1083, 2001.

LI. Electron impact excitation of Fe IX, P.J. Storey, C.J. Zeippen, and M. Le Dourneuf, Astronomy and Astrophyisics, 394, 753, 2002

LII. Electron excitation of Ni+24, M. Chidichimo, N.R. Badnell and J.A. Tully, Astronomy and Astrophysics, 401, 1177, 2003

LIII. Relativistic allowed and forbidden transition probabilities for Fe XVII, S. N. Nahar, W. Eissner, G.-X. Chen and A. K. Pradhan, A&A 408, 789, 2003

LIV. Relativistic calculations for allowed and forbidden fine structure transitions in Fe XX, S. N. Nahar, A&A 413, 779, 2004

LV. Electron impact excitation of Ni II, M. A. Bautista, A&A 420, 763, 2004

LVI. Relativistic calculations for allowed and forbidden fine structure transitions in Fe XX", Sultana N. Nahar, Astronomy and Astrophysics, 413, 779, 2004

LVII. Radiative transition rates and collision strengths within the 3d7 configuration of Ni IV, M. Melendez and M.A. Bautista, A&A 436, 1123, 2005

LVIII. Electron impact excitation of Fe XII, P. J. Storey, G. Del Zanna, H. E. Mason and C. J. Zeippen, A&A 433, 717, 2005

LIX. New radiative transition probabilities for Fe IV including fine structure", Sultana N. Nahar and Anil K. Pradhan, Astronomy and Astrophysics, 437, 345, 2005

LX. Electron-impact excitation of $n=3,4$ levels of Fe^{17+}, M. C. Witthoeft, N. R. Badnell, G. del Zanna, K. A. Berrington, J. C. Pelan , A&A, in press

LXI. Radiative E1, E2, E3, and M1 Transition Probabilities for Fe IV, Sultana N. Nahar, A&A, in press

LXII. Allowed and forbidden transitions in Fe XVIII in relativistic Breit-Pauli approximation, Sultana N. Nahar, A&A, in press

ABSTRACTS OF IP PAPERS: Iron Project .

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Revised: Oct. 26, 2005