We present measured electron detachment cross sections from hydrogen anion induced by collisions with O₂ in the energy range of 1 to 9 keV with two methods, the beam attenuation and the signal growth rate. Processes involved in the interaction are discussed in terms of the cross section differences as a function of the time of flight of the H⁻ through an analysing electric field. As a consequence, an ansatz value of the life-time for the auto-detaching states of H⁻ population of 39 12ns is derived that is consistent with predictions for the lifetime of the (2p ²)³P state of H⁻.

中文翻译：

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与 O2 碰撞引起的 H− 的电子脱离截面

我们使用两种方法，即光束衰减和信号增长速率，展示了在 1 到 9 keV 能量范围内与 O ₂碰撞引起的氢阴离子的测量电子脱离截面。通过分析电场，根据作为 H ^-飞行时间的函数的横截面差异来讨论相互作用中涉及的过程。因此，寿命为H的自动分离状态的一个值拟设^- 39个为12ns群体衍生的，其与预测的（2的寿命一致的p ²）³ h的P状态^- 。