Superlattice Channeling Radiation as an Intense, Quasi- Monochromatic X-Ray Source

超晶格通道辐射作为一种强的准单色x射线源正在被研究。应变层超晶格具有与超晶格晶体各层方向交替的弯曲面。一个高能带电粒子沿着一个弯曲的平面被引导，它将跟随晶体中的弯曲，这种振荡将导致它发射辐射。高能量（10-100 McV）电子沿着应变层超晶格的弯曲平面通道发射x射线辐射，其单峰为。10%全宽一半最大值（FWHM）。这种辐射被对准成一束窄光束，比标准的通道辐射更强，比产生的背景辐射强得多。超晶格通道辐射的特性使其成为无创数字减影血管造影的一个有前途的x射线源，这需要强烈的、可调的辐射峰。

Superlattice channeling radiation is being investigated as an intense, quasi-monochromatic X-ray source. A strained layer superlattice possesses bent planes which alternate direction with each layer of the superlattice crystal. A high energy charged particle which is channeled along a bent plane will follow the bends in the crystal and this oscillation will cause it to emit radiation. High energy (10-100 McV) electrons channeled along the bent planes of a strained layer superlattice emit X-ray radiation in a single peak of .10% full width half maximum (FWHM). This radiation is collimated into a narrow beam, more intense than standard channeling radiation and far more intense than the background radiation produced. The characteristics of superlattice channeling radiation make it a promising X-ray source for non-invasive digital subtraction angiography, which requires intense, tunable radiation peaks.