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Resonance phenomena in electron impact excitation of the fundamental vibrational modes of water

机译:水的基本振动模式的电子碰撞激发中的共振现象

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Absolute differential cross-sections for electron impact excitation of the bending (010) and unresolved stretching (100) + (001) vibrational modes of water (H2O) are reported. The incident electron energy is E-0 = 7.5 eV and the scattered electron angular range 10 degrees-120 degrees. Significant angular structure in both the (010) and (100) + (001) differential cross-sections, due to resonant decay from H2O-, is apparent. This observation confirms the earlier result of Seng and Linder [ J. Phys. B 9 (1976) 2539] for resonance enhancement of the stretching modes, but is contrary to their analysis for the bending mode where they postulated the dominant population mechanism was due to direct scattering. Integral cross-sections for excitation of the (010) and (100) + (001) quanta at 7.5 eV are also reported. (C) 2000 Elsevier Science B.V. All rights reserved. [References: 16]
机译:报道了电子碰撞激发的弯曲(010)和未解析的拉伸(100)+(001)的水(H2O)振动模式的绝对微分截面。入射电子能量为E-0 = 7.5 eV,散射电子角度范围为10度至120度。由于(H2O-)的共振衰减,在(010)和(100)+(001)的微分截面中都有明显的角结构。这一观察结果证实了Seng和Linder的早期结果。 [B 9(1976)2539]用于共振增强拉伸模式,但是与他们对弯曲模式的分析相反,在弯曲模式中,他们假设主要的种群机制是由于直接散射。还报道了在7.5 eV激发(010)和(100)+(001)量子的积分横截面。 (C)2000 Elsevier Science B.V.保留所有权利。 [参考:16]

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