The target thickness for nitrogen was determined from the beam energy loss in HIRFL-CSRe during the experimental study of the K-REC process in 197 MeV/u Xe54＋-N2 collisions. Furthermore, the corresponding integrated ...The target thickness for nitrogen was determined from the beam energy loss in HIRFL-CSRe during the experimental study of the K-REC process in 197 MeV/u Xe54＋-N2 collisions. Furthermore, the corresponding integrated luminosity of （1.15±0.06） x 10^30 cm-2 was obtained. As an independent check on the energy-loss method, we have also determined the integrated luminosity by measuring the produced X-rays from the K-REC process with a known differential cross section. The values of （1.12±0.06） x 10^30 and （1.09±0.06） x 1030 cm-2 were obtained by using two high-purity germanium （HPGe） detectors which were oriented at 90% and 120%with respect to the beam path, respectively. The consistent results confirmed the feasibility of the energy-loss method, which may have an important impact on future internal target experiments at HIRFL-CSRe.展开更多
基金Supported by National Natural Science Foundation of China(11179017,11105201,U1532130,and U1332206)
文摘The target thickness for nitrogen was determined from the beam energy loss in HIRFL-CSRe during the experimental study of the K-REC process in 197 MeV/u Xe54＋-N2 collisions. Furthermore, the corresponding integrated luminosity of （1.15±0.06） x 10^30 cm-2 was obtained. As an independent check on the energy-loss method, we have also determined the integrated luminosity by measuring the produced X-rays from the K-REC process with a known differential cross section. The values of （1.12±0.06） x 10^30 and （1.09±0.06） x 1030 cm-2 were obtained by using two high-purity germanium （HPGe） detectors which were oriented at 90% and 120%with respect to the beam path, respectively. The consistent results confirmed the feasibility of the energy-loss method, which may have an important impact on future internal target experiments at HIRFL-CSRe.
