| 理论预测超重核274-291Cn和266-287Ds的衰变模式 |
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| 引用本文： | 赵天亮,包小军.理论预测超重核274-291Cn和266-287Ds的衰变模式[J].原子核物理评论,2018,35(4):455-462. |
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| 作者姓名： | 赵天亮 包小军 |
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| 作者单位： | 湖南师范大学物理系, 长沙 410081 |
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| 基金项目： | 国家自然科学基金资助项目（11705055，11475050）；湖南省自然科学基金资助项目（2018JJ3324）；湖南省教育厅优秀青年基金资助项目（17B154） |
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| 摘 要： | 自发裂变和α衰变是影响超重核稳定性的两个主要因素。为了探索270Ds附近的长寿命的超重核，系统地计算了电荷数在104 ≤ Z ≤ 112范围内的α衰变与自发裂变之间的竞争。采用推广的液滴模型和唯象的解析公式计算了α衰变半衰期。基于包括壳效应和同位旋效应的WKB近似方法估算了相同超重核的自发裂变半衰期，进而预测了未知超重核274-276，279Cn与267-269Ds的衰变模式。The stability of superheavy nuclei (SHN) is controlled mainly by spontaneous fission and α decay processes. To investigate whether long lived SHN could really exist around 270Ds, the competition between α decay and spontaneous fission in the region 104 ≤ Z ≤ 112 are studied systematically. The α decay half-lives are investigated by employing a generalized liquid drop model (GLDM) and phenomenological analytical formula. Calculations of spontaneous fission half-lives for the same SHN are carried out based on the Wenzel-Kramers-Brillouin(WKB) approximation with both the shell effect and the isospin effect included. Decay modes are predicted for the unknown nuclei 274-276,279Cn and 267-269Ds.
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| 关 键 词： | 超重核 半衰期 α 衰变 自发裂变 |
| 收稿时间： | 2018-09-12 |
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