Results of a calibration of olivines from meteorites by means of 238U nuclei at the Bevalac accelerator
Perelygin V. P. , Stetsenko S. G.
The results of a calibration of the sensitivity of olivine crystals from meteorites by means by 238U nuclei at the Bevalac accelerator are reported. The spectra of etchable lengths of the accelerated 238U nuclei and of "ancient" tracks in these olivines show that the group of ancient tracks —210 μτη long found in 1980 in the Nuclear Reactions Laboratory of the Joint Institute for Nuclear Research was caused by galactic cosmic rays of the Th-U group. The possibility of an unambiguous identification of a group of anomalously long cosmic-ray tracks, 340-360 μτη long, is discussed.
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![](/ps/1116/article_16893_800_head.png "The results of a calibration of the sensitivity of olivine crystals from meteorites by means by <sup>238</sup>U nuclei at the Bevalac accelerator are reported. The spectra of etchable lengths of the accelerated <sup>238</sup>U nuclei and of "ancient" tracks in these olivines show that the group of ancient tracks <b>—</b>210 <i>μτη </i>long found in 1980 in the Nuclear Reactions Laboratory of the Joint Institute for Nuclear Research was caused by galactic cosmic rays of the Th-U group. The possibility of an unambiguous identification of a group of anomalously long cosmic-ray tracks, 340-360 <i>μτη </i>long, is discussed.")