Zobrazeno 1 - 10 of 13 pro vyhledávání: '"T. K. Krueger"'
1
Transition probabilities for N IV, O V and O VI
Autor: S. J. Czyzak, T. K. Krueger
Publikováno v: Astrophysics and Space Science. 60:99-117
Dipole lengths and dipole velocities have been determined for a series of transitions in N IV, O V and O VI. Some of these transitions are of astrophysical interest and the remainder were computed to give a more complete picture of the transitions in
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6469ef63d5edb51fac4035062ce050ed
https://doi.org/10.1007/bf00648246
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2
Electron collisions with ions of the 3p3configuration
Autor: T K Krueger, S J Czyzak
Publikováno v: Proceedings of the Physical Society. 90:623-627
Extensive calculations are being made of the cross sections for electron impact excitation of the metastable levels of the 3pq (q = 2, 3, 4) configuration. These cross sections are important in the interpretation of gaseous nebulae spectra. Collision
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6daa962b709d222526c8e8b093c9162c
https://doi.org/10.1088/0370-1328/90/3/307
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3
Excitation of forbidden lines in gaseous nebulae - II. Calculations for 3p q ions
Autor: S. J. Czyzak, T. K. Krueger
Publikováno v: Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences. 318:531-539
The formulation for electron collisions with ions in configurations 1s 2 2s 2 2p 2 and 1s 2 2s 2 2p 6 3s 2 3q q has been given in paper I of the present series (Saraph, Seaton & Shemming 1969). The present paper gives results of numerical calculation
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::512b8e63b7ba861a3e38dcafa09341fc
https://doi.org/10.1098/rspa.1970.0159
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6
Excitation of Metastable Levels in Low Density Nebular Plasmas: [SII] and [ArIV]
Autor: T. K. Krueger, Lawrence H. Aller, S. J. Czyzak
Publikováno v: Proceedings of the National Academy of Sciences of the United States of America. 66(2)
Diagnostics of low density nebular plasma by means of its forbidden line spectrum require not only a knowledge of certain intensity ratios as a function of its density and temperature but also a knowledge of the occupation numbers of relevant ionic l
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c087c38a5a4c020abe3a6ef629439d79
https://pubmed.ncbi.nlm.nih.gov/16591841
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7
Collision Strengths for Excitation of Forbidden Lines
Autor: Michael John Seaton, T. K. Krueger, P. A. P. de Martins, Hannelore E. Saraph, S. J. Czyzak, J. Shemming
Publikováno v: Planetary Nebulae ISBN: 9789401034753
New calculations of collision strengths are being made for ions in configurations np q , n=2 and 3 and q= 1−5. Wave functions for the entire system are represented by sums over anti-symmetrized products of ion functions and orbitals for the collidi
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::66b5b51d79541bbaf58a1685d3b588b0
https://doi.org/10.1007/978-94-010-3473-9_22
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9
Excitation of forbidden lines: Calculations for the 2p3, 2p4, 3p2and 3p4isoelectronic sequences
Autor: H E Saraph, S J Czyzak, T K Krueger, J. Shemming
Publikováno v: Proceedings of the Physical Society. 92:1146-1147
Using methods described by Saraph, Seaton and Shemming in 1966, collision strengths have been calculated for the isoelectronic sequences 2p3, 2p4, 3p2 and 3p4.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8e1199c2a88c44e588cc29024dcf1e42
https://doi.org/10.1088/0370-1328/92/4/143
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10
Yttrium Abundance in the Sun
Autor: T. K. Krueger, J. Ross, S. J. Czyzak, Lawrence H. Aller
Publikováno v: The Astrophysical Journal. 152:765
Solar abundance of Y derived from Y II lines by computing transition probabilities and oscillator strength involving several configurations
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1398710bd043332cda9f458458e86a03
https://doi.org/10.1086/149593
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