Observation of Electron Bubbles in para-H2−D2 (HD) Mixtures by High-Resolution ESR Spectroscopy

• DOI: 10.1021/jp991650w
• Publication Date: 2002-07-26T05:40:56Z
• Authors: Takayuki Kumada; Shoji Mori; Jun Kumagai; Yasuyuki Aratono; Tetsuo Miyazaki
• Keywords: 0103 physical sciences; 01 natural sciences

A sharp singlet signal assigned to electron bubbles was observed in γ-irradiated solid para-H2−D2 (HD) mixtures by use of high-resolution ESR spectroscopy. The signal was not observed in pure para-H2 but in the mixtures. This result indicates that the D2 and HD molecules play an important role in the formation of the electron bubbles in para-H2. The electron bubbles decay with a half-lifetime of about 2 h, and the decay rate constant at 4.2 K is very close to that at 2.2 K. This result shows that the electron bubbles migrate in the p-H2 sample via quantum mechanical tunneling.