Interaction Potential for NaCs for Ultracold Scattering and Spectroscopy.

Interaction Potential for NaCs for Ultracold Scattering and Spectroscopy.
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用于超冷散射与光谱学研究的钠铯相互作用势

DOI:
10.1021/acs.jpca.2c01810
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发表时间:
2022-06-30
影响因子:
2.9
通讯作者:
Hutson, Jeremy M.
Hutson, Jeremy M.
中科院分区:
化学3区
文献类型:
--
作者:
Brookes, Samuel G. H.;Hutson, Jeremy M.

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我们通过拟合超冷散射和光镊光谱实验,得到了NaCs的相互作用势。中心区域的潜力已被准确地确定从傅里叶变换光谱在较高的温度下,所以我们专注于调整的长程和短程部分。我们使用结合能和波函数的耦合通道计算来理解在超冷光谱中观察到的分子状态的性质,以及导致用于创建超冷NaCs分子的Feshbach共振的状态。我们阐明了实验量和相互作用势的特征之间的关系。我们建立的实验量的组合,确定特定功能的潜力。我们发现长程色散系数C_6必须增加约0.9%到3256(1)Eha_0_6才能符合实验结果。我们使用耦合通道计算的最终潜力预测的束缚态能量和共振位置。
We obtain the interaction potential for NaCs by fitting to experiments on ultracold scattering and spectroscopy in optical tweezers. The central region of the potential has been accurately determined from Fourier transform spectroscopy at higher temperatures, so we focus on adjusting the long-range and short-range parts. We use coupled-channel calculations of binding energies and wave functions to understand the nature of the molecular states observed in ultracold spectroscopy and of the state that causes the Feshbach resonance used to create ultracold NaCs molecules. We elucidate the relationships between the experimental quantities and features of the interaction potential. We establish the combinations of experimental quantities that determine particular features of the potential. We find that the long-range dispersion coefficient C6 must be increased by about 0.9% to 3256(1)Eha06 to fit the experimental results. We use coupled-channel calculations on the final potential to predict bound-state energies and resonance positions.
DOI: 10.1098/rspa.1960.0125
发表时间: 1960-01-01
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