| Abstrakt: |
The reactions of 125I obtained from the 125Xe(EC)125I process with methane have been investigated. It was confirmed that electron scavengers, such as I2, SF6, and O2, play an important role. The main product is only CH3125I, the yield decreasing significantly with the concentration of Xe. By adding various additives, the yield of CH3125I in the presence of trace amount of I2was assigned as follows: 8.7±6.7% by the hot atom reaction, 35.8±8.0% by 125I+in the 1D2state, and 31.5±2.0% by 125I+in the 3P states. The results are discussed in comparison with those reported on similar reactions utilizing different activation processes. Chemical sequences of the formation of CH3125I are proposed. |
