O(6)-symmetry breaking in the {gamma}-soft nucleus {sup 126}Xe and its evolution in the light stable xenon isotopes
O(6)-symmetry breaking in the {gamma}-soft nucleus {sup 126}Xe and its evolution in the light stable xenon isotopes
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{gamma}-软核{sup 126}Xe中的O(6)-对称性破缺及其在光稳定氙同位素中的演化
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
S. Zhu
中科院分区：
文献类型：
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作者：
L. Coquard;G. Rainovski;N. Pietralla;T. Ahn;L. Bettermann;M. Carpenter;R. Janssens;J. Leske;C. Lister;O. Möller;T. Möller;W. Rother;V. Werner;S. Zhu
通过 399 MeV 下的 {sup 12}C({sup 126}Xe,{sup 126}Xe{sup *}) 射弹库仑激发反应研究了 {sup 126}Xe 中的低位集体态。使用 Gammasphere 阵列检测到 {gamma} 衰变。获得了相对于2{sub 1}{sup +}态的库仑激发截面。已推导出 22 个绝对 E2 过渡强度。 SD 相互作用玻色子模型 (IBM-1) 拟合与新的实验数据非常吻合。这使得 {sup 126}Xe 中 O(6) 对称性破缺的定量测试成为可能。测量的绝对 B(E2) 值表明 O(5) 对称性得以保留，而 O(6) 对称性被破坏。讨论了 {sup 124,126,128}Xe 同位素链中 O(6) 对称破缺和 O(5) 对称守恒的演化。
Low-lying collective states in {sup 126}Xe have been investigated via the {sup 12}C({sup 126}Xe,{sup 126}Xe{sup *}) projectile Coulomb excitation reaction at 399 MeV. The {gamma} decays were detected with the Gammasphere array. Coulomb excitation cross sections relative to the 2{sub 1}{sup +} state were obtained. Twenty-two absolute E2 transition strengths have been deduced. An sd- interacting boson model (IBM-1) fit agrees well with the new experimental data. This makes a quantitative test of O(6)-symmetry breaking in {sup 126}Xe possible. The measured absolute B(E2) values indicate a preservation of O(5) symmetry, while the O(6) symmetry is broken. The evolution of O(6)-symmetry breaking and of O(5)-symmetry conservation in the {sup 124,126,128}Xe isotopic chain is discussed.