太阳耀斑硬X射线能谱演变特征

	太阳耀斑硬X射线能谱演变特征
	林华安
刊名	空间科学学报
	1999
卷号	19 期号:4 页码:295-300
关键词	耀斑硬X射线能谱演变时变辐射方程
ISSN号	0254-6124
其他题名	THE EVOLUTION OF HARD X-RAY ENERGY SPECTRUM IN SOLAR FLARES
通讯作者	北京8701信箱
中文摘要	太阳硬X射线是耀斑设有电子束流与太阳大气相互作用产生的轫致辐射,根据简单的太阳耀珏环物理模型,假定具充量与能谱同步变化的高能电子束流从耀斑环顶部注入,计算了硬x射线辐射在不同的靶物质密度区的能谱演变特征.结果表明;硬X射线辐射在低大气密度靶区呈现软－硬－硬的能谱演变特征,在高密度靶区硬X射线能谱则具有软－硬－软的变化特征.
英文摘要	The hard X-rays of solar flares are produced by Bremsstrahlung interaction of high energy electron beam impinging on solar atmosphere. Based on a simple phys-ical model of flare loop, and under the assumption that the high energy electrons with synchronous variation between the beam flux and spectrum index are injected from the top of the loop, some calculated results about hard X-ray spectrum evo-lution with different atmosphere density are obtained in this paper. These results show:in low density area, such as in the top of loop, the hard X-ray spectrum has soft-hard-hard evolution property, in high density area, such as in the foot points of loop, the spectrum possesses soft-hard-soft variation. The time duration of injecting electrons will influence the height of region in the loop where the one type of hard X-ray spectrum evolution will transform into the other one.
学科主题	空间环境
收录类别	CSCD
语种	中文
CSCD记录号	CSCD:688156
内容类型	期刊论文
源URL	[http://ir.cssar.ac.cn/handle/122/253]
专题	国家空间科学中心_空间环境部
推荐引用方式 GB/T 7714	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.
APA	林华安.(1999).太阳耀斑硬X射线能谱演变特征.空间科学学报,19(4),295-300.
MLA	林华安."太阳耀斑硬X射线能谱演变特征".空间科学学报 19.4(1999):295-300.