頁籤選單縮合
| 題 名 | UV Fluorescence of N₂ Produced by Forbidden Absorption and Resonant Energy Transfer with Argon |
|---|---|
| 作 者 | Nee, J. B.; Yang, J. C.; Chen, H. K.; | 書刊名 | Chinese Journal of Physics |
| 卷 期 | 47:5 2009.10[民98.10] |
| 頁 次 | 頁625-632 |
| 分類號 | 330 |
| 關鍵詞 | |
| 語 文 | 英文(English) |
| 英文摘要 | UV fluorescence is observed in N₂ excited by VUV synchrotron radiation, with the strongest signals measured at 105.6 107.6, 109.9, and 124 nm. From the absorption spectrum we find that these are bands of the Tanaka system produced by the forbidden absorption with the transition CⅡu(v´=0–3) X¹∑+ g . The N₂(C) state subsequently radiates to the BⅡ+ g state producing the second positive band (2PB) fluorescence. Additional UV fluorescence is observed at excited states of Ar and CO presented as impurities in N₂ with mixing ratios of 10¯⁵. Similar to N₂, excited states of Ar at about 11.5 eV can be populated by resonant absorption, and then this can be followed by a collisional transfer of energy to N₂ to generate 2PB fluorescence. Among the two possible resonant states of argon, Ar*(¹P1) is more efficient than Ar*(P1) in producing the 2PB fluorescence through collisions. In addition, the absorption spectrum of the Lyman-Birge-Hopfield system of a¹Ⅱg–X¹∑+ g , and the weaker systems of B´∑+ u –X¹∑+g and a´X ¹∑+ u –X¹∑+ g were also observed. |
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