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arXiv 1006.0937physics.atom-ph
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OH自由基与He原子和D $_2$分子的低能非弹性碰撞

Low-energy inelastic collisions of OH radicals with He atoms and D$_2$ molecules

Moritz Kirste, Ludwig Scharfenberg, Jacek Kłos, François Lique, Millard H. Alexander, Gerard Meijer, Sebastiaan Y. T. van de Meerakker

备注：
8 pages, 4 figures
发表信息：
Phys. Rev. A 82, 042717 (2010)
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摘要：

在交叉束实验中研究了碰撞能量在100 ~ 500 cm $^{-1}$之间的OH（$X^2Π_{3/2}, J=3/2, f$）自由基与He和D $_2$的转动非弹性散射. OH自由基的状态选择和速度调整使用斯塔克减速器。相对宇称分辨状态到状态的非弹性散射截面的准确测定。这些实验补充了最近的低能碰撞研究之间的捕获OH自由基和光束的He和D PDMATHAMN是敏感的总（弹性和非弹性）截面（Sawyer \emph{et al.}，\emph{Phys. Rev. Lett.} \textbf{2008}，\emph{101}，203203），但理论计算不能再现其测量的横截面（Pavlovic \emph{et al.}，\emph{J. Phys. Chem. A} \textbf{2009}，\emph{113}，14670）。对于OH-He系统，我们的实验验证了严格的量子计算确定的非弹性截面。

英文摘要：

We present an experimental study on the rotational inelastic scattering of OH ($X^2Π_{3/2}, J=3/2, f$) radicals with He and D$_2$ at collision energies between 100 and 500 cm$^{-1}$ in a crossed beam experiment. The OH radicals are state selected and velocity tuned using a Stark decelerator. Relative parity-resolved state-to-state inelastic scattering cross sections are accurately determined. These experiments complement recent low-energy collision studies between trapped OH radicals and beams of He and D$_2$ that are sensitive to the total (elastic and inelastic) cross sections (Sawyer \emph{et al.}, \emph{Phys. Rev. Lett.} \textbf{2008}, \emph{101}, 203203), but for which the measured cross sections could not be reproduced by theoretical calculations (Pavlovic \emph{et al.}, \emph{J. Phys. Chem. A} \textbf{2009}, \emph{113}, 14670). For the OH-He system, our experiments validate the inelastic cross sections determined from rigorous quantum calculations.

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