High resolution, high pressure xenon gamma ray spectroscopy using primary and stimulated light emission

摘要

A design and readout of a xenon detection medium based device, which provides improved spectroscopic performance compared to currently commercially available devices. To achieve energy resolution improvement, a method to accurately measure radial spatial position for interacting events within a HPXe cylindrical detector is described using the plan as shown in FIG. 4. This is accomplished by utilization of light generated both at the gamma interaction site and at the collection point near the anode wire of the cylindrical detector. These light flashes are detected by a VUV photon detector. Light transmission is facilitated by incorporating a vacuum ultraviolet (VUV) light transparent window at least one end of the cylindrical ionization detector. With the known electron drift velocity in HPXe, the time between these two photopulses is sufficient to accurately determine the radial coordinate. Consequently, correction by electronic means for the electrostatic pulse dispersion using the expression graphed in FIG. 2 can be achieved in order to approach the true intrinsic energy resolution limit for HPXe.