search

cloudy-astrophysics / bug-tracker-migration-test

Trial run for importing the nublado.org Trac tickets as GitHub issues
0 stars 0 forks source link

collision strengths for H-like 13 ? Z ? 42 (trac #353) #355

Open cloudy-bot opened 9 years ago

cloudy-bot commented 9 years ago

reported by: @CloudyLex

Title:  
Radiative rates and electron-impact excitation for the n ? 6 fine-structure levels in H-
like ions with 13 ? Z ? 42

Authors:    
Li, S.; Yan, J.; Li, C. Y.; Si, R.; Guo, X. L.; Huang, M.; Chen, C. Y.; Zou, Y. M.

Affiliation:    
AA(Applied Ion Beam Physics Laboratory, Fudan University, Key Laboratory of the Ministry of Education, PR China chychen@fudan.edu.cn; Shanghai EBIT Lab, Institute of Modern Physics, Department of Nuclear Science and Technology, Fudan University, 200433, Shanghai, PR China), AB(Institute of Applied Physics and Computational Mathematics, 100088, Beijing, PR China; Center for Applied Physics and Technology, Peking University, 100871, Beijing, PR China), AC(Institute of Applied Physics and Computational Mathematics, 100088, Beijing, PR China), AD(Applied Ion Beam Physics Laboratory, Fudan University, Key Laboratory of the Ministry of Education, PR China; Shanghai EBIT Lab, Institute of Modern Physics, Department of Nuclear Science and Technology, Fudan University, 200433, Shanghai, PR China), AE(Applied Ion Beam Physics Laboratory, Fudan University, Key Laboratory of the Ministry of Education, PR China; Shanghai EBIT Lab, Institute of Modern Physics, Department of Nuclear Science and Technology, Fudan University, 200433, Shanghai, PR China), AF(Applied Ion Beam Physics Laboratory, Fudan University, Key Laboratory of the Ministry of Education, PR China; Shanghai EBIT Lab, Institute of Modern Physics, Department of Nuclear Science and Technology, Fudan University, 200433, Shanghai, PR China), AG(Applied Ion Beam Physics Laboratory, Fudan University, Key Laboratory of the Ministry of Education, PR China; Shanghai EBIT Lab, Institute of Modern Physics, Department of Nuclear Science and Technology, Fudan University, 200433, Shanghai, PR China), AH(Applied Ion Beam Physics Laboratory, Fudan University, Key Laboratory of the Ministry of Education, PR China; Shanghai EBIT Lab, Institute of Modern Physics, Department of Nuclear Science and Technology, Fudan University, 200433, Shanghai, PR China)
Publication:    
Astronomy & Astrophysics, Volume 583, id.A82, 9 pp. (A&A Homepage)
Publication Date:   
11/2015
Origin: 
EDP Sciences
Astronomy Keywords: 
atomic data, atomic processes
DOI:    
10.1051/0004-6361/201526567
Bibliographic Code: 
2015A&A...583A..82L
Abstract

Context. Many observed emission lines from space missions are due to highly 
charged H-like ions. An analysis of the lines provides information on the 
temperature, density, and chemical composition of plasmas. A wide range of atomic 
parameters, such as energy levels, radiative rates, and excitation rate coefficients 
are needed to achieve this goal. 

Aims: In this paper we report on calculations for energy levels, radiative rates, 
collision strengths, and effective collision strengths for transitions among the 36 
lowest levels of the n ? 6 configurations of highly charged H-like ions with 13 ? Z ? 
42. 

Methods: The widely used Flexible Atomic Code (FAC) is adopted for the calculation. 
Energy levels and radiative rates are calculated within the relativistic configuration-
interaction method. Employing relativistic distorted-wave approximation, direct 
excitation collision strengths are calculated at eleven scattered electron energies E'f 
= 0.001, 0.002, 0.005, 0.01, 0.02, 0.05, 0.1, 0.2, 0.5, 1.0, and 2.5, where E'f is in units 
of Z2 rydbergs. Collision strengths at higher energies are estimated by 
interpolation/extrapolation using relativistic Bethe form. Resonance contributions 
through the relevant He-like doubly excited n'l'n''l'' configurations with n' ? 7 and n'' 
? 75 are explicitly taken into account using the independent-process isolated-
resonance approximation. Radiation damping effects are taken into account. 

Results: We present the radiative rates, oscillator strengths, and line strengths for all 
electric dipole (E1), magnetic dipole (M1), electric quadrupole (E2), magnetic 
quadrupole (M2), electric octupole (E3), and magnetic octupole (M3) transitions. 
Assuming a Maxwellian electron velocity distribution, we report effective collision 
strengths over a wide temperature range between 2 × 103 × Z2 and 2 × 106 × Z2 K. 
We believe that the present results are the most extensive and definitive atomic 
dataset to date for highly charged H-like ions.

Full Tables 1-4 are available at the CDS via anonymous ftp to http://cdsarc.u-
strasbg.fr (ftp://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?
J/A+A/583/A82

Migrated from https://www.nublado.org/ticket/353

{
    "status": "new",
    "changetime": "2019-02-04T13:02:49Z",
    "_ts": "1549285369825011",
    "description": "{{{\nTitle:\t\nRadiative rates and electron-impact excitation for the n ? 6 fine-structure levels in H-\nlike ions with 13 ? Z ? 42\n\nAuthors:\t\nLi, S.; Yan, J.; Li, C. Y.; Si, R.; Guo, X. L.; Huang, M.; Chen, C. Y.; Zou, Y. M.\n\nAffiliation:\t\nAA(Applied Ion Beam Physics Laboratory, Fudan University, Key Laboratory of the Ministry of Education, PR China chychen@fudan.edu.cn; Shanghai EBIT Lab, Institute of Modern Physics, Department of Nuclear Science and Technology, Fudan University, 200433, Shanghai, PR China), AB(Institute of Applied Physics and Computational Mathematics, 100088, Beijing, PR China; Center for Applied Physics and Technology, Peking University, 100871, Beijing, PR China), AC(Institute of Applied Physics and Computational Mathematics, 100088, Beijing, PR China), AD(Applied Ion Beam Physics Laboratory, Fudan University, Key Laboratory of the Ministry of Education, PR China; Shanghai EBIT Lab, Institute of Modern Physics, Department of Nuclear Science and Technology, Fudan University, 200433, Shanghai, PR China), AE(Applied Ion Beam Physics Laboratory, Fudan University, Key Laboratory of the Ministry of Education, PR China; Shanghai EBIT Lab, Institute of Modern Physics, Department of Nuclear Science and Technology, Fudan University, 200433, Shanghai, PR China), AF(Applied Ion Beam Physics Laboratory, Fudan University, Key Laboratory of the Ministry of Education, PR China; Shanghai EBIT Lab, Institute of Modern Physics, Department of Nuclear Science and Technology, Fudan University, 200433, Shanghai, PR China), AG(Applied Ion Beam Physics Laboratory, Fudan University, Key Laboratory of the Ministry of Education, PR China; Shanghai EBIT Lab, Institute of Modern Physics, Department of Nuclear Science and Technology, Fudan University, 200433, Shanghai, PR China), AH(Applied Ion Beam Physics Laboratory, Fudan University, Key Laboratory of the Ministry of Education, PR China; Shanghai EBIT Lab, Institute of Modern Physics, Department of Nuclear Science and Technology, Fudan University, 200433, Shanghai, PR China)\nPublication:\t\nAstronomy & Astrophysics, Volume 583, id.A82, 9 pp. (A&A Homepage)\nPublication Date:\t\n11/2015\nOrigin:\t\nEDP Sciences\nAstronomy Keywords:\t\natomic data, atomic processes\nDOI:\t\n10.1051/0004-6361/201526567\nBibliographic Code:\t\n2015A&A...583A..82L\nAbstract\n\nContext. Many observed emission lines from space missions are due to highly \ncharged H-like ions. An analysis of the lines provides information on the \ntemperature, density, and chemical composition of plasmas. A wide range of atomic \nparameters, such as energy levels, radiative rates, and excitation rate coefficients \nare needed to achieve this goal. \n\nAims: In this paper we report on calculations for energy levels, radiative rates, \ncollision strengths, and effective collision strengths for transitions among the 36 \nlowest levels of the n ? 6 configurations of highly charged H-like ions with 13 ? Z ? \n42. \n\nMethods: The widely used Flexible Atomic Code (FAC) is adopted for the calculation. \nEnergy levels and radiative rates are calculated within the relativistic configuration-\ninteraction method. Employing relativistic distorted-wave approximation, direct \nexcitation collision strengths are calculated at eleven scattered electron energies E'f \n= 0.001, 0.002, 0.005, 0.01, 0.02, 0.05, 0.1, 0.2, 0.5, 1.0, and 2.5, where E'f is in units \nof Z2 rydbergs. Collision strengths at higher energies are estimated by \ninterpolation/extrapolation using relativistic Bethe form. Resonance contributions \nthrough the relevant He-like doubly excited n'l'n''l'' configurations with n' ? 7 and n'' \n? 75 are explicitly taken into account using the independent-process isolated-\nresonance approximation. Radiation damping effects are taken into account. \n\nResults: We present the radiative rates, oscillator strengths, and line strengths for all \nelectric dipole (E1), magnetic dipole (M1), electric quadrupole (E2), magnetic \nquadrupole (M2), electric octupole (E3), and magnetic octupole (M3) transitions. \nAssuming a Maxwellian electron velocity distribution, we report effective collision \nstrengths over a wide temperature range between 2 \u00d7 103 \u00d7 Z2 and 2 \u00d7 106 \u00d7 Z2 K. \nWe believe that the present results are the most extensive and definitive atomic \ndataset to date for highly charged H-like ions.\n\nFull Tables 1-4 are available at the CDS via anonymous ftp to http://cdsarc.u-\nstrasbg.fr (ftp://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?\nJ/A+A/583/A82\n\n}}}",
    "reporter": "gary",
    "cc": "",
    "resolution": "",
    "time": "2015-11-24T13:08:53Z",
    "component": "atomic/molecular data base",
    "summary": "collision strengths for H-like 13 ? Z ? 42",
    "priority": "good to do",
    "keywords": "",
    "version": "trunk",
    "milestone": "no milestone",
    "owner": "nobody",
    "type": "enhancement"
}
cloudy-bot commented 9 years ago

@peter-van-hoof-noaccount changed milestone from "" to "no milestone"