AUTODETACHMENT FROM VIBRATIONAL LEVELS OF THE O(2)(-)A(2)PI(U) RESONANCE ACROSS ITS DISSOCIATION LIMIT BY PHOTOEXCITATION FROM O(2)(-)X(2)PI(G)

Bailey CG.; Serxner D.; Johnson MA.; Lavrich DJ.

首页> 外文期刊>The Journal of Chemical Physics >AUTODETACHMENT FROM VIBRATIONAL LEVELS OF THE O(2)(-)A(2)PI(U) RESONANCE ACROSS ITS DISSOCIATION LIMIT BY PHOTOEXCITATION FROM O(2)(-)X(2)PI(G)

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AUTODETACHMENT FROM VIBRATIONAL LEVELS OF THE O(2)(-)A(2)PI(U) RESONANCE ACROSS ITS DISSOCIATION LIMIT BY PHOTOEXCITATION FROM O(2)(-)X(2)PI(G)

机译：通过光激发从O（2）（-）X（2）PI（G）的O（2）（-）A（2）PI（U）共振水平的解离及其解离极限

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We report the observation of resonance structure in the photodetachment spectrum of O-2(-) in the 4 eV range, which results from the excitation of autodetaching vibrational levels of the O-2(-) A-X transition near the dissociation limit. The evolution of the resonances with increasing vibration is simply explained using continuity of the inner part of the vibrational wave functions across the dissociation threshold. This affords the possibility of investigating the DA process at the half-collision, in a kind of ''correspondence limit'' where the outer turning point slowly recedes and the vibrational wave function incrementally adopts the character of the dissociation continuum. Photoexcitation near one of the resonances results in the population of significantly higher vibrational levels in the O-2 a(1) Delta(g) state (which are cleanly resolved) than the typical ''Franck-Condon'' pattern observed for nonresonant photodetachment. Finally, hot-band structure is also observed in the detachment spectrum, allowing us to extract a more accurate value of the O-2(-) vibrational quantum (Delta G=134.41+/-0.8 meV) by about an order of magnitude over previous determinations. (C) 1996 American Institute of Physics. [References: 28]

机译：我们报告了在4 eV范围内O-2（-）的光解谱中的共振结构的观察，这是由O-2（-）A-X跃迁在解离极限附近的自分离振动能级的激发引起的。使用振动波函数的内部在整个解离阈值上的连续性，可以简单地解释随着振动增加而产生的共振。这提供了一种研究“碰撞极限”的可能性，该碰撞是在半碰撞时，外部转折点缓慢后退，振动波函数逐渐采用了解离连续性的特征。靠近共振之一的光激发导致O-2 a（1）Delta（g）态（已完全分解）的振动水平明显高于非共振光分离的典型“ Franck-Condon”模式。。最后，在分离谱中也观察到热带结构，这使我们能够提取O-2（-）振动量子的更精确值（ΔG = 134.41 +/- 0.8 meV），约为整个过程的一个数量级。先前的决定。（C）1996年美国物理研究所。 [参考：28]

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《The Journal of Chemical Physics》 |1996年第5期|共8页
作者
Bailey CG.; Serxner D.; Johnson MA.; Lavrich DJ.;
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正文语种 eng
中图分类物理化学（理论化学）、化学物理学;
关键词
Electron-impact; O2; Spectroscopy; Transition; Scattering; Molecules; States; Ion; O-2;

机译：电子撞击;O2;光谱学;过渡;散射;分子;态;离子;O-2;

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1. AUTODETACHMENT FROM VIBRATIONAL LEVELS OF THE O(2)(-)A(2)PI(U) RESONANCE ACROSS ITS DISSOCIATION LIMIT BY PHOTOEXCITATION FROM O(2)(-)X(2)PI(G) [J] . Bailey CG., Serxner D., Johnson MA., The Journal of Chemical Physics . 1996,第5期

机译：通过光激发从O（2）（-）X（2）PI（G）的O（2）（-）A（2）PI（U）共振水平的解离及其解离极限
2. Semiempirical Study of Perturbations of the Lande g Factors of Electronic-Vibrational-Rotational Levels of Hydrogen: IV. The I~(1)(PI)_(g)~(-), R~(1)(PI)_(g)~(-), J~(1)(DELTA)_(g)~(-), and S~(1)(DELTA)_(g)~(-) States of the H_(2) and D_(2) Molecules [J] . S. A. Astashkevich Optics and Spectroscopy . 2007,第2期

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AUTODETACHMENT FROM VIBRATIONAL LEVELS OF THE O(2)(-)A(2)PI(U) RESONANCE ACROSS ITS DISSOCIATION LIMIT BY PHOTOEXCITATION FROM O(2)(-)X(2)PI(G)

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