CIDEP measurement in the L band microwave frequency region. Hyperfine-independent versus hyperfine-dependent mechanisms in the ST_mixing of acetone in 2-propanol
✍ Scribed by Masahide Terazima; Yuji Miura; Keishi Ohara; Noboru Hirota
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 364 KB
- Volume
- 224
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
Chemically induced dynamic electron polarization (CIDEP) in an acetone/2-propanol system is investigated in the L band microwave frequency region at various temperatures. The polarization due to the ST_ mechanism is analyzed in terms of the mixing of hypertine-independent (ST_M-i) and hypertine-dependent (ST_M-d) mechanisms. At higher temperature, ST_Md dominates over ST_M-i in the ST_M polarization, while the relative contribution of ST_M-i increases with decreasing temperature. A mechanism of ST_M-d is discussed based on the radical diffusion in solution and a possible contribution of the ST +M polarization in the CIDEP spectrum is discussed.