Proton pygmy resonances: Predictions for N = 20 isotones
Proton pygmy resonances: Predictions for N = 20 isotones
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DOI：
10.1140/epja/i2016-16176-0
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发表时间：
2015-09
期刊：
影响因子：
--
通讯作者：
Y. Kim;P. Papakonstantinou
中科院分区：
文献类型：
--
作者：
Y. Kim;P. Papakonstantinou
本文从理论上研究了异频子的低能电偶极响应。我们目前的结果从准粒子随机相位近似（QRPA）和连续随机相位近似（CRPA），我们比较它们与镜像核的结果。根据我们的分析，增强E1强度预计大力低于巨偶极共振的质子丰富的同位素。大量的E1强度的不对称isotones的预测，明显不同于他们同样不对称的镜像核，毫不含糊地指向结构效应的作用，如松散的绑定。特别是在~（46）Fe中，质子-皮振荡会发生。预测在所有同位素中的同位素响应都很强。在平均场处理中对非定域阈跃迁和核子有效质量的恰当描述可能会影响理论预测。我们呼吁进行系统的理论研究，以量化的作用，预计在测量ofE 1过渡丰质子核的散装物质的性质。
We study theoretically the low-energy electric-dipole response ofisotones. We present results from a quasiparticle random-phase approximation (QRPA) and a continuum random-phase approximation (CRPA), and we compare them with results for the mirrornuclei. According to our analysis, enhancedE1 strength is expected energetically well below the giant dipole resonance in the proton-rich isotones. Large amounts ofE1 strength in the asymmetricisotones are predicted, markedly unlike their equally asymmetricmirror nuclei, pointing unambiguously to the role of structural effects such as loose binding. A proton-skin oscillation could develop especially in46Fe . The isoscalar response is predicted strong in all isotones. The proper description of non-localized threshold transitions and the nucleon effective mass in mean-field treatments may affect theoretical predictions. We call for systematic theoretical investigations to quantify the role of bulk-matter properties in anticipation of measurements ofE1 transitions in proton-rich nuclei.