H Lyman‐α emission from photodissociation of H2O

H Lyman‐α emission from photodissociation of H2O
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H2O 光解离产生的 H Lyman-α 发射

DOI:
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发表时间:
1978
期刊:
影响因子:
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通讯作者:
P. Guyon
P. Guyon
中科院分区:
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文献类型:
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作者:
J. Mentall;G. Möhlmann;P. Guyon

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从阈值到500 A,研究了水蒸气光解产生H(n=2)原子的过程。813.0A的实验阈值几乎与热力学极限一致。激发截面从阈值缓慢上升,在709 A时达到最大值(1.55±0.12)×10−18 cm 2,在550 A以下降低到可忽略的值。结构的激发函数是由于预解离的里德伯系列收敛到? H2O+的2B2态。
Photodissociation of water vapor to produce H(n=2) atoms was examined from threshold to 500 A. The experimental threshold of 813.0 A nearly coincides with the thermodynamic limit. Excitation cross sections rise slowly from threshold to a maximum value of (1.55±0.12) ×10−18 cm2 at ∼709 A and decreases to a negligible value below 550 A. Structure in the excitation function is attributed to predissociation of Rydberg series converging to the ? 2B2 state of H2O+.