Radioisotope Centre POLATOM, National Centre for Nuclear Research, Andrzeja Sołtana 7, 05-400, Otwock, Poland.
European Commission, Joint Research Centre (JRC), Geel, Belgium.
Appl Radiat Isot. 2023 May;195:110733. doi: 10.1016/j.apradiso.2023.110733. Epub 2023 Feb 18.
The L6 chondritic meteorite, HaH-346, fell in Libya. However, neither the exact date of the fall nor the exact size of the original meteoroid or asteroid is known. A specimen of the meteorite, weighing 488 g, was measured using ultra low-background gamma-ray spectrometry in the 225 m deep underground facility HADES. Activation products Na, Al, Co, Co, Mn and Ti were detected. The detection efficiency was determined by 3D scanning the meteorite and introducing this in the computer model of the detector and sample implemented in the MCNP6.2 Monte Carlo code. The activities of Na and Al support the hypothesis that the fall took place on 26 August 2018. Furthermore, the Co and Al activities indicate that the original radius of meteoroid was between 50 and 80 cm, which suggests the mass prior to atmospheric entry was between 2400 and 7300 kg.
L6 球粒陨石 HaH-346 降落在利比亚。然而，下落的确切日期以及原始流星体或小行星的确切大小都不清楚。使用 HADES 地下 225 米深的超低本底伽马射线光谱仪对重达 488 克的陨石标本进行了测量。探测到激活产物 Na、Al、Co、Mn 和 Ti。通过对陨石进行 3D 扫描，并将其引入探测器和样品的探测器模型中，在 MCNP6.2 蒙特卡罗代码中实现，确定了检测效率。Na 和 Al 的活性支持了 2018 年 8 月 26 日发生坠落的假说。此外，Co 和 Al 的活性表明，流星体的原始半径在 50 到 80 厘米之间，这表明进入大气层前的质量在 2400 到 7300 公斤之间。
