Tioukov Valeri, Alexandrov Andrey, Bozza Cristiano, Consiglio Lucia, D'Ambrosio Nicola, De Lellis Giovanni, De Sio Chiara, Giudicepietro Flora, Macedonio Giovanni, Miyamoto Seigo, Nishiyama Ryuichi, Orazi Massimo, Peluso Rosario, Sheshukov Andrey, Sirignano Chiara, Stellacci Simona Maria, Strolin Paolo, Tanaka Hiroyuki K M
Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Napoli, Italy.
Dipartimento di Fisica, Università degli Studi di Salerno, Fisciano, Italy.
Sci Rep. 2019 Apr 30;9(1):6695. doi: 10.1038/s41598-019-43131-8.
Muography consists in observing the differential absorption of muons - elementary particles produced through cosmic-ray interactions in the Earth atmosphere - going through the volcano and can attain a spatial resolution of tens of meters. We present here the first experiment of nuclear emulsion muography at the Stromboli volcano. Muons have been recorded during a period of five months by a detector of 0.96 m area. The emulsion films were prepared at the Gran Sasso underground laboratory and were analyzed at Napoli, Salerno and Tokyo scanning laboratories. Our results highlight a significant low-density zone at the summit of the volcano with density contrast of 30-40% with respect to bedrock. The structural setting of this part of the volcanic edifice controls the eruptive dynamics and the stability of the "Sciara del Fuoco" slope, which is affected by recurrent tsunamigenic landslides. Periodical imaging of the summit of the Stromboli volcano such as that provided by muography can become a useful method for studying the evolution of the internal structure of the volcanic edifice.
μ子成像技术是通过观测μ子（一种由宇宙射线与地球大气层相互作用产生的基本粒子）穿过火山时的差异吸收情况来实现的，其空间分辨率可达数十米。我们在此展示了在斯特龙博利火山进行的首次核乳胶μ子成像实验。使用一个面积为0.96平方米的探测器，在五个月的时间里记录μ子。乳胶膜在大萨索地下实验室制备，并在那不勒斯、萨勒诺和东京的扫描实验室进行分析。我们的结果突出显示，火山顶部存在一个显著的低密度区域，与基岩相比，密度反差为30% - 40%。火山 edifices 这一部分的结构设置控制着喷发动力学以及“Sciara del Fuoco”斜坡的稳定性，该斜坡受到反复发生的海啸成因滑坡的影响。像μ子成像技术所提供的对斯特龙博利火山顶部的定期成像，可能会成为研究火山 edifices 内部结构演化的一种有用方法。
