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On the Positronium Continuum and 0.511 MeV Line in Solar Flares
作者姓名:L.I.Miroshnichenko
作者单位:IZMIRAN,Troitsk,Moscow Region,142190,Russia
基金项目:the National Natural Science Foundation of China.
摘    要:We have studied the influence of the density of the annihilation region on the positronium continuum. A relation between the ratio 3γ/2γ and the densityis explicitly given, with which one can derive directly from the observed 3γ/2γ the density where the annihilation occurs. A unique solution may be found from the observed width of the 0.511MeV line. We applied the method to three flares observed by GRS/SMM. It is shown that due to the measuring uncertainties in the 0.511 MeV line width, we cannot distinguish a chromospheric source from a coronal source, though both accurately localized. To improve the measuring accuracy of the 0.511MeV line and the ratio 3γ/2γ will be an important step for a better understanding of the annihilation process in solar flares.

关 键 词:电子偶素  电磁感应  闭联集  比率  X射线  伽马射线

On the Positronium Continuum and 0.511 MeV Line in Solar Flares
L.I.Miroshnichenko.On the Positronium Continuum and 0.511 MeV Line in Solar Flares[J].Chinese Journal of Astronomy and Astrophysics,2004,4(4):357-364.
Authors:Wei-QunGan JinChang You-PingLi YangSu LIMiroshnichenko
Institution:[1]PurpleMountainObservatory,ChineseAcademyofSciences,Nanjing210008 [2]IZMIRAN,Troitsk,MoscowRegion,142190,Russia
Abstract:
Keywords:Sun: flares - Sun: X-rays  gamma-rays
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