负离子准束缚态的预测
Predicting quasibound states of negative ions
摘要：
我们证明了一个负离子的准bound光谱的准确预测使用一种新的高精度的理论方法。我们使用La $^-$作为测试案例，因为最近的实验测量了其光剥离光谱中归因于准束缚态跃迁的11个共振的能量[C. W. Walter等人，PRA，in press（2020）; arXiv：2010.01122].我们确定了所有观察到的共振，并预测了一个刚刚超出先前实验范围的峰。根据理论预测，在预测波长处观察到峰，验证了鉴别。同样的方法也适用于广泛的负离子。此外，在这项工作中报告的理论进展可用于大量产生的中性和正离子的各种应用所需的原子跃迁性质。
英文摘要：
We demonstrated the accurate prediction of a quasibound spectrum of a negative ion using a novel high-precision theoretical approach. We used La$^-$ as a test case due to a recent experiment that measured energies of 11 resonances in its photodetachment spectrum attributed to transitions to quasibound states [C. W. Walter et al., PRA, in press (2020); arXiv:2010.01122]. We identified all of the observed resonances, and predicted one more peak just outside the range of the prior experiment. Following the theoretical prediction, the peak was observed at the predicted wavelength, validating the identification. The same approach is applicable to a wide range of negative ions. Moreover, theory advances reported in this work can be used for massive generation of atomic transition properties for neutrals and positive ions needed for a variety of applications.
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