A mass-independent expanded Dunham analysis of aluminum monoxide and aluminum monosulfide
A mass-independent expanded Dunham analysis of aluminum monoxide and aluminum monosulfide
复制标题
一氧化铝和一硫化铝的质量无关扩展邓纳姆分析
DOI：
10.1016/j.jms.2018.06.001
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发表时间：
2018
影响因子：
1.4
通讯作者：
T. Giesen
中科院分区：
文献类型：
--
作者：
A. Breier;B. Waßmuth;Thomas Buechling;G. Fuchs;J. Gauss;T. Giesen
用毫米波超声射流光谱仪结合激光烧蚀源记录了27 Al 16 O、27 Al 18 O、27 Al 32 S和27 Al 34 S在振动基态和单激发振动态的纯转动跃迁。总共分配了275个旋转转换。首次使用一氧化铝和一硫化铝的同位素体进行质量无关的扩展Dunham分析。观察到玻恩-奥本海默近似的崩溃。基于这些与质量无关的分析，预测了稀有放射性同位素26 AlO和26 AlS的纯转动跃迁的频率位置，其不确定性在亚MHz水平。这些数据将允许使用亚毫米观测设备在天体物理环境中搜索26铝物种。
Pure rotational transitions of27Al16O,27Al18O,27Al32S, and27Al34S are recorded in the vibrational ground state and singly excited vibrational state using a mm-wavelength supersonic jet spectrometer in combination with a laser ablation source. In total 275 rotational transitions have been assigned. For the first time, mass-independent expanded Dunham analyses are performed using isotopologues of aluminum monoxide and aluminum monosulfide. The breakdown of the Born-Oppenheimer approximation is observed. Based on these mass-independent analyses, frequency positions of pure rotational transitions of the rare radioactive isotopologues26AlO and26AlS are predicted with uncertainties at the sub-MHz level. These data will allow to search for26Al-species in astrophysical environments using submm-observation facilities.