Heavy lithium isotope ^11,12Li production in pion absorption reactions on a ¹⁴C radioactive target

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• 作者：Yu. B. Gurov (1) r>E. M. Kalinin (1) r>V. S. Karpukhin (1) r>S. V. Lapushkin (1) r>I. V. Laukhin (1) r>V. A. Pechkurov (1) r>V. G. Sandukovsky (1) r>B. A. Chernyshev (1) chernyshev@mephi.ru r>T. D. Shchurenkova (1)
• 刊名：Bulletin of the Russian Academy of Sciences ; Physics
• 出版时间：April 2010
• 出版年：2010
• 期刊代码：pc951_1062-8738
• 类别：ph
• 卷：74
• 期：4
• 页码：433-436
• 数据来源：sp

摘要

The results from an experimental search for the production of heavy lithium isotopes 11,12Li in stopped π−-meson absorption reactions on a 14C radioactive target are presented. A pronounced peak is observed in the missing mass spectrum of the 14C(π−, pp)X reaction, which is associated with the formation of a nucleon-unstable 12Li state with the following resonance parameters: E _R = 4.0 卤 0.2 MeV and Γ = 1.1 卤 0.2 MeV. Resonance parameters of three low-lying 11Li excited states were determined in the 14C(π−, pd)X, reaction.