> 1, if the'/> SELF-SHIELDING OF X-RAYS AND GAMMA RAYS IN COMPACT SOURCES
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Astrophysical journal >SELF-SHIELDING OF X-RAYS AND GAMMA RAYS IN COMPACT SOURCES
【24h】

SELF-SHIELDING OF X-RAYS AND GAMMA RAYS IN COMPACT SOURCES

机译：紧凑光源中X射线和伽马射线的自屏蔽

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

It is generally supposed that when the " compactness" l ≡ Lσ_T/(rm_e c~3) in photons above the pair-production threshold is large, few γ-rays can escape. We demonstrate that even when l > > 1, if the high-energy and low-energy photons are produced in geometrically separated regions, many of the γ-rays can, in fact, escape. Pair production along a thin surface separating the two sources creates enough Compton optical depth to deflect most of the low-energy photons away from the high-energy ones. Those few low-energy photons that penetrate the shielding surface are reduced in opacity by advection to large distance and small density, by relativistic beaming along the inner edge of the surface, and by Compton upscattering to higher energies inside the surface. The pairs in this surface flow outward relativistically, forming a structure resembling a pair-dominated mildly relativistic jet.
机译：通常认为，当成对产生阈值以上的光子中的“紧密度” l≡Lσ_T/（rm_e c〜3）大时，几乎没有γ射线可以逃逸。我们证明，即使当l 1时，如果在几何上分开的区域中生成高能和低能光子，则实际上许多γ射线都可以逃逸。沿将两个源分开的薄表面上的成对产生可产生足够的康普顿光学深度，以使大多数低能光子偏离高能光子。通过平流到较大的距离和较小的密度，通过沿表面内边缘的相对论射束以及通过康普顿向上散射到表面内部的较高能量，可以使穿透屏蔽表面的少数几个低能量光子的不透明度降低。该表面中的对相对地向外流动，形成类似于以对为主体的轻相对论射流的结构。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号