Near-LTE linear response calculations with a collisional-radiative model for He-like Al ions

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Description

We investigate the non-equilibrium atomic kinetics using a collisional-radiative (CR) model modified to include line absorption. Steady-state emission is calculated for He-like aluminum ions immersed in a specified radiation field having fixed deviations from a Planck spectrum. The net emission is interpreted in terms of NLTE population changes. The calculation provides an NLTE response matrix, and in agreement with a general relation of non-equilibrium thermodynamics, the response matrix is symmetric. We compute the response matrix for 1% and 50% changes in the photon temperature and find linear response over a surprisingly large range.

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17 p.

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More, R.M. & Kato, T. January 6, 1998.

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Description

We investigate the non-equilibrium atomic kinetics using a collisional-radiative (CR) model modified to include line absorption. Steady-state emission is calculated for He-like aluminum ions immersed in a specified radiation field having fixed deviations from a Planck spectrum. The net emission is interpreted in terms of NLTE population changes. The calculation provides an NLTE response matrix, and in agreement with a general relation of non-equilibrium thermodynamics, the response matrix is symmetric. We compute the response matrix for 1% and 50% changes in the photon temperature and find linear response over a surprisingly large range.

Physical Description

17 p.

Notes

INIS; OSTI as DE98052081

Other: FDE: PDF; PL:

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  • Kyoto University workshop on spectroscopy of nonequilibrium plasmas, Kyoto (Japan), 15-16 Dec 1997

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  • Other: DE98052081
  • Report No.: UCRL-JC--129333
  • Report No.: CONF-971228--
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 300247
  • Archival Resource Key: ark:/67531/metadc688754

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  • January 6, 1998

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  • July 25, 2015, 2:20 a.m.

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  • April 10, 2017, 2:05 p.m.

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More, R.M. & Kato, T. Near-LTE linear response calculations with a collisional-radiative model for He-like Al ions, article, January 6, 1998; California. (digital.library.unt.edu/ark:/67531/metadc688754/: accessed September 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.