Volume 34 Issue 4
Jul.  2014
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Zhang Qingguo, He Jian, You Jinghan. Research on the Effect of Opacity on Solar Coronal Soft X-ray OⅧ Spectral Line[J]. Journal of Space Science, 2014, 34(4): 384-389. doi: 10.11728/cjss2014.04.384
Citation: Zhang Qingguo, He Jian, You Jinghan. Research on the Effect of Opacity on Solar Coronal Soft X-ray OⅧ Spectral Line[J]. Journal of Space Science, 2014, 34(4): 384-389. doi: 10.11728/cjss2014.04.384

Research on the Effect of Opacity on Solar Coronal Soft X-ray OⅧ Spectral Line

doi: 10.11728/cjss2014.04.384
  • Received Date: 2013-04-15
  • Rev Recd Date: 2014-04-19
  • Publish Date: 2014-07-15
  • To study the effect of opacity on solar plasma X-rays in solar coronal region, using the basic theory of photon escape factor in spectral analysis, the effect of opacity on intensity ratio of solar OⅧ 1.897nm and 1.601nm spectral lines is analyzed. Under optically thick conditions, theory of the effect of photon escape factor on the intensity ratio of the solar spectral lines is discussed. In the calculation, the optically depth of OⅧ spectral lines is discussed, and finally the effective emission thickness of OⅧ ion in solar plasma is estimated. Results show that under optically thick conditions, the opacity has great effect on solar OⅧ spectral line, and the effective emission thickness of OⅧ ion is greater than that in other solar ultraviolet spectral line. This is important for plasma diagnose in solar plasma emission layer.

     

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  • [1]
    Irons F E. The escape factor in plasma spectroscopy-I. The escape factor defined and evaluated[J]. J. Quant. Spectrosc. Radiat. Trans., 1979, 22(1):1-20
    [2]
    Guo Ce, Xue Bingsen, Lin Zhaoxiang. Study for prediction method of X-ray flare characteristic parameters[J]. Chin. J. Space Sci., 2012, 32(6):771-777. In Chinese (郭策, 薛炳森, 林兆祥. 太阳X射线耀斑特征参数预报 方法研究[J]. 空间科学学报, 2012, 32(6):771-777)
    [3]
    Sun Weiying, Wu Ji. The study on bremsstrahlung of plasma in 1AU during quiet Sun and solar flare period[J]. Chin. J. Space Sci., 2004, 24(6):412-420. In Chinese (孙伟英, 吴季. 太阳宁静及耀斑期间1AU附近等离子体轫 致辐射研究[J]. 空间科学学报, 2004, 24(6):412-420)
    [4]
    Lin Huaan. The evolution of hard x-Ray energy spectrum in solar flares[J]. Chin. J. Space Sci., 1999, 19(4):295-300. In Chinese (林华安. 太阳耀斑硬X射线能谱演 变特征[J]. 空间科学学报, 1999, 19(4):295-300)
    [5]
    Rugge H R, McKenzie D L. X-ray line ratios for FeV!I!I observed in the solar coronal[J]. Astrophys. J., 1985, 297:338-346
    [6]
    Waljeski K, Moses D, Dere K P, et al. The composition of a coronal active region[J]. Astrophys. J., 1994, 429(2):909-923
    [7]
    Wattaker D S, Tallents G J. Iron opacity predictions under solar interior conditions[J]. Mon. Notic. Roy. Astron. Soc., 2009, 400(4):1808-1813
    [8]
    Brichhouse N S, Schmelz J T. The transparency of solar coronal active regions[J]. Astrophys. J. Lett., 2006, 636(1):L53-L56
    [9]
    Schmelz J T, Saba J L R, Strong K T. Resonance scattering of Fe XVⅡ-A density diagnostic[J]. Astrophys. J., 1992, 398:L115-L118
    [10]
    Meyer J P. The baseline composition of solar energetic particles[J]. Astrophys. J., 1985, 57(Supp.S):151-171
    [11]
    Schmeiz J T, Saba J L R, Chuavin J C, et al. Investigation the effect of opacity in soft x-Ray spectral lines emitted by solar coronal active regions[J]. Astrophys. J., 1997, 477:509-515
    [12]
    Keenan F P, Kingston A E. An approximate calculation of the effect of opacity on SiⅢ emission line ratios near the solar limb[J]. Mon. Notic. Roy. Astron. Soc., 1986, 220:493-500
    [13]
    Kastner S O, Bhatia A K. Half-widths, escape probabilities and intensity factors of opacity-broadened Doppler- and Voigt-profile lines[J]. J. Quant. Spectrosc. Radiat. Trans., 1997, 58(2):217-231
    [14]
    He J, Zhang Q G. Calculation of the effect of opacity in the solar spectral lines of carbon ions[J]. Adv. Space Res., 2013, 51:2002-2009
    [15]
    Saba J L R, Schmelz J T, Bhatia A K, et al. Fe XVⅡ soft s-Ray lines: theory and data comparisons[J]. Astrophys. J., 1999, 510:1064-1077
    [16]
    He J, Liao L L. The opacity of the solar spectral lines of CⅡ 133.5nm[J]. Spectr. Lett., 2012, 45(6):452-457
    [17]
    Doyle J G, Mcwhirter R W P. An approximate calculation of the effect of opacity in the solar spectral lines of CⅢ[J]. Mon. Notic. Roy. Astron. Soc., 1980, 193:947-955
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