Zobrazeno 1 - 10
of 89
pro vyhledávání: '"K A Berrington"'
Publikováno v:
Annales Geophysicae, Vol 21, Pp 1177-1182 (2003)
Anomalous ion line spectra have been identified in many experiments. Such spectra are defined as deviations from the standard symmetric "double-humped" spectra derived from incoherent scatter radar echoes from the upper atmosphere. Some anoma
Externí odkaz:
https://doaj.org/article/04e3132e579449b5a143cfd7d3b8e36c
Autor:
A. V. Pavlov, K. A. Berrington
Publikováno v:
Annales Geophysicae, Vol 17, Pp 919-924 (1999)
The atomic oxygen fine structure cooling rate of thermal electrons based on new effective collision strengths for electron impact excitation of the ground-state 3P fine-structure levels in atomic oxygen have been fitted to an analytical expression
Externí odkaz:
https://doaj.org/article/6b74f33c26b546e289d5b3bf530da7cb
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 39:4733-4745
A series of R-matrix calculations on K+ is used to derive electron excitation and ionization cross sections. The excitation cross section to the 4s and 3d levels leading to the K+ 60.1, 60.8 and 61.3 nm emission lines shows a poor agreement with the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3d8120daed12bc158752f6234ae57963
https://doi.org/10.1088/0953-4075/39/22/016
https://doi.org/10.1088/0953-4075/39/22/016
Autor:
K A Berrington
Publikováno v:
Journal of physics B: Atomic, molecular and optical physics
The collisional transition between two highly excited atomic states with different spin is investigated theoretically. Taking helium-like n1S − n3P as an example, it is found that the transition is driven in the highly ion-ized Fe ion purely by exc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8e7527df1b355b2a88f7fe4025bc5004
https://doi.org/10.1088/0953-4075/39/18/017
https://doi.org/10.1088/0953-4075/39/18/017
Publikováno v:
Astronomy & Astrophysics. 446:361-366
We present results for electron-impact excitation of F-like Fe calculated using R-matrix theory where an intermediate-coupling frame transformation (ICFT) is used to obtain level-resolved collision strengths. Two such calculations are performed, the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fc2d5c4aafca0cefe9035bace20cc571
https://doi.org/10.1051/0004-6361:20053631
https://doi.org/10.1051/0004-6361:20053631
Publikováno v:
The Astrophysical Journal. 630:1213-1216
Experimental cross sections are reported for the 1s22s2 1S → 1s22s2p 1Po transition in O+4 located at 19.689 eV. Use is made of the electron energy-loss method, using a merged electron-ion beam geometry. The center-of-mass interaction energies for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aee52e0d20531214b28ecacb82cc44c7
https://doi.org/10.1086/431752
https://doi.org/10.1086/431752
Publikováno v:
Astronomy & Astrophysics. 430:331-341
Collision strengths for electron induced transitions in the beryllium-like ion Fe+22 are calculated using the intermediate coupling frame transformation (ICFT) version of the R-matrix programs. Our target has 98 fine structure states 1 s(2) nl n'l' S
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e7b76aa2202133389dd982f95d038bcc
https://doi.org/10.1051/0004-6361:20041358
https://doi.org/10.1051/0004-6361:20041358
Publikováno v:
Astronomy & Astrophysics. 422:731-749
This is the first in a series of papers in which we benchmark recent atomic data available for astrophysical applications. We review various issues related to the completeness and accuracy of both theoretical and experimental data. In this paper, the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e90cc52aa187c6301752988774b02612
https://doi.org/10.1051/0004-6361:20034432
https://doi.org/10.1051/0004-6361:20034432
Publikováno v:
Annales Geophysicae, Vol 21, Pp 1177-1182 (2003)
Annales Geophysicae
Annales Geophysicae, European Geosciences Union, 2003, 21 (5), pp.1177-1182
Annales Geophysicae, Vol 21, Iss 5, Pp 1177-1182 (0000)
Annales Geophysicae
Annales Geophysicae, European Geosciences Union, 2003, 21 (5), pp.1177-1182
Annales Geophysicae, Vol 21, Iss 5, Pp 1177-1182 (0000)
Anomalous ion line spectra have been identified in many experiments. Such spectra are defined as deviations from the standard symmetric "double-humped" spectra derived from incoherent scatter radar echoes from the upper atmosphere. Some anomalous spe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::31c7a156605af1e611d47fb78c364fa5
https://www.ann-geophys.net/21/1177/2003/angeo-21-1177-2003.pdf
https://www.ann-geophys.net/21/1177/2003/angeo-21-1177-2003.pdf
Autor:
Shinobu Nakazaki, K A Berrington
Publikováno v:
Atomic Data and Nuclear Data Tables. 82:1-113
A comprehensive database of radiative data for Cl and its ions is presented, based on R -matrix calculations in LS coupling. Tables for each ion include bound state energies for terms up to n =9, oscillator strengths for transitions involving n ≤5
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::694e5ce193bf925ad35619a7fa35b886
https://doi.org/10.1006/adnd.2002.0880
https://doi.org/10.1006/adnd.2002.0880