Long-lived, highly excited neutral hydrogen atom production following oxygen 1s photoexcitation of gas-phase water molecules

気体水分子の酸素1s励起後に伴う長寿命,中性,高励起状態水素原子の生成について

Harries, J.; 下條 竜夫*; 本間 健二*; 國分 美希*; Sullivan, J. P.*; Lebech, M.*; 東 善郎*

Harries, J.; Gejo, Tatsuo*; Homma, Kenji*; Kuniwake, Miki*; Sullivan, J. P.*; Lebech, M.*; Azuma, Yoshiro*

We have studied the production of long-lived, highly-excited, neutral hydrogen atom fragments following oxygen 1s inner-shell excitation/ionization of gas-phase water molecules using synchrotron radiation. Striking differences to fragment ion and low- neutral H yields are observed close to threshold. To investigate the decay pathways involved the neutral fragments were also detected in coincidence with H, O, O, and OH fragments.