摘要
太阳质子耀斑X射线辐射特征的研究,为太阳质子事件的警报提供一个重要的途径和方法。本文分析了第21周太阳活动峰年(1977—1986)期间质子耀斑和相应的GOES和SMM卫星观测的X射线辐射资料,结果表明:大部分质子耀斑的硬X射线峰值流量F_HX≥10~4s/c;积分流量F_0≥10~6counts;硬X射线辐射到达峰值时间T_R≥100s;持续时间T_D≥10~3s;X光子最高能量E_x≥300keV;平均能谱指数r≤3.5;高能时延T_L≥10s。利用这些X射线暴的特征参数,对第21周峰年大质子事件作警报检验,结果是:报准率为94％,虚报率为40％。
Studying the characteristics of solar X-ray emission for proton flare will provide an important way and method for proton event warning. The observational data of proton flares and relevant X-ray emission obtained by GOES and SMM satellites during the 21st Solar Maximum are analysed in this paper. It shows that,for most proton flares, the hard X-ray emission has following properties: the peak flux Fux≥104 c/s, duration time Tn≥103 sec, maximum X-ray photon energy Ex≥300 keV, average spectral index<3.5, high energy time delay TL> 10 sec, integral flux F0>106 counts, rising time TR>102 sec. By using these characteristic parameters to warn the proton events, the a correct prediction rate of 94% and a false prediction rate of 40% are obtained respectively.
出处
《空间科学学报》
CAS
CSCD
北大核心
1993年第2期122-128,共7页
Chinese Journal of Space Science
基金
国家自然科学基金
