核径迹探测器奇异粒子的探测
Nuclear Track Detectors. Searches for Exotic Particles
摘要:
我们使用核径迹探测器(NTD)CR 39和Makrofol用于许多目的:i)在SPS和较低能量加速器重离子束下的暴露,用于校准目的和碎裂研究。ii)大统一理论和中等质量磁单极(IMM)、核微粒、Q球和宇宙辐射中的奇异粒子。在格兰萨索地下实验室进行的MACRO实验中,使用了约1000 m^2的CR 39探测器(加上反射器和流光管),确定了超重GUT极的上限为1.4 × 10 ^-16 cm^-2 s^-1 sr^-1(4 × 10 ^-5 <beta<1)。在高海拔Chacaltaya实验室(海拔5230米)进行的SLIM实验,使用427 m^2的CR 39探测器,暴露4.22 y,得出IMM的上限约为1.3 x 10 ^-15 cm^-2 s^-1 sr^-1。这些实验也对其他提到的外来粒子的通量产生了有趣的上限。㈢环境研究、辐射监测、中子剂量测定。
英文摘要:
We used Nuclear Track Detectors (NTD) CR39 and Makrofol for many purposes: i) Exposures at the SPS and at lower energy accelerator heavy ion beams for calibration purposes and for fragmentation studies. ii) Searches for GUT and Intermediate Mass Magnetic Monopoles (IMM), nuclearites, Q-balls and strangelets in the cosmic radiation. The MACRO experiment in the Gran Sasso underground lab, with ~1000 m^2 of CR39 detectors (plus scintillators and streamer tubes), established an upper limit for superheavy GUT poles at the level of 1.4x10^-16 cm^-2 s^-1 sr^-1 for 4x10^-5 <beta<1. The SLIM experiment at the high altitude Chacaltaya lab (5230 m a.s.l.), using 427 m^2 of CR39 detectors exposed for 4.22 y, gave an upper limit for IMMs of ~1.3x10^-15 cm^-2 s^-1 sr^-1. The experiments yielded interesting upper limits also on the fluxes of the other mentioned exotic particles. iii) Environmental studies, radiation monitoring, neutron dosimetry.
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