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Unstable states in dissociation of relativistic nuclei
The European Physical Journal A ( IF 2.6 ) Pub Date : 2020-10-06 , DOI: 10.1140/epja/s10050-020-00252-3
D. A. Artemenkov , V. Bradnova , M. M. Chernyavsky , E. Firu , M. Haiduc , N. K. Kornegrutsa , A. I. Malakhov , E. Mitsova , A. Neagu , N. G. Peresadko , V. V. Rusakova , R. Stanoeva , A. A. Zaitsev , P. I. Zarubin , I. G. Zarubina

Results are presented on the identification of the unstable nuclei \(^{8}\)Be and \(^{9}\)B and the Hoyle state (HS) in the relativistic dissociation of the isotopes \(^{9}\)Be, \(^{10}\)B, \(^{10}\)C, \(^{11}\)C, \(^{12}\)C, and \(^{16}\)O in a nuclear track emulsion (NTE). The main motivation for the study is the prospect of using these states in the search for more complex unstable states that decay with their participation. The possibilities of the NTE method for studying the contribution of multiple ensembles of the lightest He and H nuclei to the fragmentation of relativistic nuclei are described in brief. It is shown that to identify relativistic decays \(^{8}\)Be and \(^{9}\)B and HS in NTE, it is sufficient to determine the invariant mass as a function of angles in pairs and triples of He and H fragments in the approximation of conservation of momentum per nucleon of the parent nucleus. The formation of HS in the dissociation \(^{16}\)O \(\rightarrow \) 4\(\alpha \) is observed. According to the criteria established in this way, the contribution of the unstable states to the relativistic fragmentation of \(^{28}\)Si and \(^{197}\)Au nuclei was estimated. Promising applications of the NTE method in the study of nuclear fragmentation are discussed.



中文翻译:

相对论核解离中的不稳定状态

结果呈现在不稳定的原子核的识别\(^ {8} \) Be和\(^ {9} \) B和在同位素的相对论离解的霍伊尔状态(HS)\(^ {9} \ )铍,\(^ {10} \) B,\(^ {10} \) C,\(^ {11} \) C,\(^ {12} \) C,和\(^ {16} \)核径迹乳剂(NTE)中的O。这项研究的主要动机是利用这些状态寻找随着参与而衰减的更复杂的不稳定状态的前景。简要介绍了NTE方法研究最轻He和H核的多个集合对相对论核分裂的贡献的可能性。结果表明,要确定NTE中的相对论衰变\(^ {8} \) Be和\(^ {9} \) B和HS,确定不变质量作为成对和三次三倍角的函数即可。 He和H片段近似于母核每个核子的动量守恒。离解\(^ {16} \) O \(\ rightarrow \) 4中HS的形成\(\ alpha \)被观察到。根据以这种方式建立的标准,估计了不稳定状态对\(^ {28} \) Si和\(^ {197} \) Au原子相对论碎片的贡献。讨论了NTE方法在核碎裂研究中的应用前景。

更新日期:2020-10-07
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