固体表面反质子反射的实验证据
Experimental evidence of antiproton reflection by a solid surface
摘要:
我们在这里报告的实验证据的反射的一个大部分的低能量反质子束的铝墙。这是从分析一组反质子的湮灭得出的,这些反质子在撞击装置的端壁后在稀薄的氦气中静止。铝中反质子路径的蒙特卡罗模拟表明,所观察到的反射主要是通过在铝核上的多次卢瑟福式散射发生的,至少在1-10 keV的能量范围内,该现象在分析的数据中是最明显的。这些结果与普遍的信念相矛盾,根据这种信念,物质和反物质之间的相互作用是由毁灭性的湮灭现象所主导的。
英文摘要:
We report here experimental evidence of the reflection of a large fraction of a beam of low energy antiprotons by an aluminum wall. This derives from the analysis of a set of annihilations of antiprotons that come to rest in rarefied helium gas after hitting the end wall of the apparatus. A Monte Carlo simulation of the antiproton path in aluminum indicates that the observed reflection occurs primarily via a multiple Rutherford-style scattering on Al nuclei, at least in the energy range 1-10 keV where the phenomenon is most visible in the analyzed data. These results contradict the common belief according to which the interactions between matter and antimatter are dominated by the reciprocally destructive phenomenon of annihilation.
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