CHARGE SPECTRUM OF HEAVY AND SUPERHEAVY COMPONENTS OF GALACTIC COSMIC RAYS: RESULTS OF THE OLIMPIYA EXPERIMENT
CHARGE SPECTRUM OF HEAVY AND SUPERHEAVY COMPONENTS OF GALACTIC COSMIC RAYS: RESULTS OF THE OLIMPIYA EXPERIMENT
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银河宇宙线重和超重成分的电荷谱：奥林皮亚实验的结果
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
A. Volkov
中科院分区：
文献类型：
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作者：
V. Alexeev;A. Bagulya;M. Chernyavsky;A. Gippius;L. Goncharova;S. Gorbunov;M. Gorshenkov;G. Kalinina;N. Konovalova;Jieying Liu;P. Zhai;N. Okatyeva;Tatyana N. Pavlova;N. Polukhina;N. Starkov;T. N. Soe;C. Trautmann;E. Savchenko;T. Shchedrina;A. Vasiliev;A. Volkov
OLIMPIYA实验的目的是在作为核径迹探测器的石铁陨石的橄榄石晶体中寻找和识别银河系宇宙射线（GCR）重核和超重核的痕迹。该方法是基于这些晶体中粒子轨迹的逐层研磨和蚀刻。与其他作者的技术不同，这种无退火方法使用两个参数：沿轨迹的蚀刻速率（Vetch）和总轨迹长度(L)，来确定弹丸的电荷Z。在GSI （Darmstadt）和IMP（兰州）的加速器设施上进行了一系列不同的快速重离子辐照，以确定和校准弹丸电荷对Vetch和l的依赖。迄今为止，实验中最重要的结果之一是根据约11.6万处理径迹获得了zbbb40范围内的GCR原子核的电荷谱。经数据处理，共鉴定出电荷Z≥75的原子核384个，其中10个为锕系元素（90 < Z < 103）。其中3条轨道是由电荷为113 < Z < 129的原子核产生的。这种核可能是转移元素稳定岛的一部分。
The aim of the OLIMPIYA experiment is to search for and identify traces of heavy and superheavy nuclei of galactic cosmic rays (GCR) in olivine crystals from stony–iron meteorites serving as nuclear track detectors. The method is based on layer-by-layer grinding and etching of particle tracks in these crystals. Unlike the techniques of other authors, this annealing-free method uses two parameters: the etching rate along the track (Vetch) and the total track length (L), to identify charge Z of a projectile. A series of irradiations with different swift heavy ions at the accelerator facilities of GSI (Darmstadt) and IMP (Lanzhou) were performed in order to determine and calibrate the dependence of projectile charge on Vetch and L. To date, one of the most essential results of the experiment is the obtained charge spectrum of GCR nuclei within the range of Z > 40, based on about 11.6 thousand processed tracks. As the result of data processing, 384 nuclei with charges Z ≥ 75 have been identified, including 10 nuclei identified as actinides (90 < Z < 103). Three tracks were identified to be produced by nuclei with charges 113 < Z < 129. Such nuclei may be part of the Island of Stability of transfermium elements.