Development of a gaseous Xe scintillator for particle identification of high-intensity and heavy ion beams.

We have developed a gaseous Xe scintillator as a new Δ E detector which is expected to have good radiation hardness and fast response. In this research, we made a new version of the detector whose thickness is comparable to that of an ion chamber which is the current standard Δ E detector in RIBF. We carried out a performance test of the detector in RIBF. The root-mean-square (rms) resolutions of the atomic number Z around Z = 35 and Z = 55 are found to be about 0.2 and 0.3, respectively. In addition, it has a good timing resolution for a 238U beam of 74.4(6) ps in rms. [ABSTRACT FROM AUTHOR]