Terahertz spectroscopy of N 18 O and isotopic invariant fit of several nitric oxide isotopologs
Terahertz spectroscopy of N 18 O and isotopic invariant fit of several nitric oxide isotopologs
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DOI：
10.1016/j.jms.2014.12.002
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发表时间：
2014-12
影响因子：
1.4
通讯作者：
H. Muller;Kaori Kobayashi;Kazumasa Takahashi;Kazuko Tomaru;F. Matsushima
中科院分区：
文献类型：
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作者：
H. Muller;Kaori Kobayashi;Kazumasa Takahashi;Kazuko Tomaru;F. Matsushima
一个可调谐远红外激光边带光谱仪被用来研究一氧化氮样品富含18 O之间0.99和4.75太赫兹。在0.99和2.52 THz之间记录了规则的电偶极跃迁，而在3.71和4.75 THz之间记录了2 Π 1/2和2 Π 3/2自旋梯之间的磁偶极跃迁。将这些数据与N18 O的低频数据（未标记的原子分别指14 N和16 O）、NO、15 NO、N17 O和15 N18 O的转动数据以及NO的外差红外数据相结合，以进行一种同位素不变拟合。旋转，精细和超精细结构参数确定沿着振动，旋转，和Born-Oppenheimer击穿校正。由此产生的光谱参数允许预测旋转光谱适合于识别各种一氧化氮同位素，特别是在星际介质中的旋转光谱。
A tunable far-infrared laser sideband spectrometer was used to investigate a nitric oxide sample enriched in 18 O between 0.99 and 4.75 THz. Regular, electric dipole transitions were recorded between 0.99 and 2.52 THz, while magnetic dipole transitions between the 2 Π 1/2 and 2 Π 3/2 spin-ladders were recorded between 3.71 and 4.75 THz. These data were combined with lower frequency data of N 18 O (unlabeled atoms refer to 14 N and 16 O, respectively), with rotational data of NO, 15 NO, N 17 O, and 15 N 18 O, and with heterodyne infrared data of NO to be subjected to one isotopic invariant fit. Rotational, fine and hyperfine structure parameters were determined along with vibrational, rotational, and Born–Oppenheimer breakdown corrections. The resulting spectroscopic parameters permit prediction of rotational spectra suitable for the identification of various nitric oxide isotopologs especially in the interstellar medium by means of rotational spectroscopy.