Reexamination of the Claim of Marinov <i>et al.</i>on Discovery of Element 112

作     者：S. R. Hashemi-Nezhad Reinhard Brandt Wolfram Westmeier 

作者机构：School of Physics University of Sydney NSW 2006 Australia Kernchemie FB Chemie Philipps Universitä t Marburg Germany Dr. Westmeier GmbH Ebsdorfergrund Germany 

出 版 物：《World Journal of Nuclear Science and Technology》 (核科学与技术国际期刊（英文）)

年 卷 期：2018年第8卷第4期

页      面：147-159页

学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学] 

主　　题：Element 112 Tungsten Target Spallation Products Heavy Ion Fusion 

摘      要：Marinov et al. have detected spontaneous fission events in sources separated from tungsten targets irradiated with 24 GeV protons. These fission events could not be attributed to actinides or to any other known isotope. Marinov et al. propose that fission events are due to production of element 112 (Eka-Hg) in the tungsten target. We have addressed Marinov’s claim with a new analysis of their data and modern theoretical model calculations of possible interactions. Using data available in the literature the spontaneous fission half-life of the Eka-Hg was estimated to be ~74 days. This is dramatically longer than the half-life obtained for 283112Cn, produced in the fusion of energetic 48Ca ions with 238U. Monte Carlo calculations show that enough Sr isotopes are produced in the tungsten target to make the production of element 112 via fusion of Sr and W feasible;however, if such fusion was possible it had to be deep sub-barrier fusion.