论文标题
ra核中振动梨形的观察：更新
The observation of vibrating pear shapes in radon nuclei: update
论文作者
论文摘要
有大量证据表明原子核会经历八杆畸变并假定梨的形状。这种现象对于测量原子的电偶极力矩很重要，这表明CP违规，因此超出了粒子物理的标准模型以外的探测物理学。 ra和镭的同位素已被确定为此类测量值的候选者。在这里，我们通过加速这些放射性核的光束观察到$^{224} $ rn和$^{226} $ rn中的低洼量子状态。我们在这里报告2019年出版物中未分配的其他州。我们表明，ra同位素会发生八杆振动，但在其基态中不具有静态梨形。我们得出的结论是，ra原子为增强可测量的原子二极管力矩增强提供了较不利的条件。
There is a large body of evidence that atomic nuclei can undergo octupole distortion and assume the shape of a pear. This phenomenon is important for measurements of electric-dipole moments of atoms, which would indicate CP violation and hence probe physics beyond the standard model of particle physics. Isotopes of both radon and radium have been identified as candidates for such measurements. Here, we have observed the low-lying quantum states in $^{224}$Rn and $^{226}$Rn by accelerating beams of these radioactive nuclei. We report here additional states not assigned in our 2019 publication. We show that radon isotopes undergo octupole vibrations but do not possess static pear-shapes in their ground states. We conclude that radon atoms provide less favourable conditions for the enhancement of a measurable atomic electric-dipole moment.
