Proton polarization with p-terphenyl crystal by integrated solid effect on photoexcited triplet state
Proton polarization with p-terphenyl crystal by integrated solid effect on photoexcited triplet state
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DOI：
10.1016/j.jmr.2005.04.011
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发表时间：
2005-08-01
影响因子：
2.2
通讯作者：
Shimizu, HM
中科院分区：
文献类型：
--
作者：
Iinuma, M;Takahashi, Y;Shimizu, HM
我们在掺杂0.1mol%并五苯的对三联苯单晶中进行了质子极化实验。实验是在室温或77K下，在3kG的磁场中进行的。采用波长为590 nm、平均功率为150 mW、重复频率为50 Hz的脉冲染料激光器，在室温下获得了体质子1.3%的极化率。用500 mW、50 Hz、相同波长的染料激光照射，在77 K时，偏振度达到18%。用中子透射法测量了质子的极化。这一结果与核磁共振法测定的结果一致。(c)2005年爱思唯尔公司All rights reserved.
We have carried out the experiments for polarizing protons in single crystals of p-terphenyl doped with 0.1 mol% pentacene. The experiments have been performed in a magnetic field of 3 kG at room temperature or at 77 K. We obtained the polarization of 1.3% for protons in bulk at room temperature by using a pulsed dye-laser with the wavelength of 590 nm, the average power of 150 mW, and the repetition rate of 50 Hz. The polarization at 77 K reached 18% by irradiation with the dye-laser of 500 mW, 50 Hz and the same waveleneth. The polarization of protons was measured by the neutron transmission method also. The result was consistent with that measured by the nuclear magnetic resonance. (c) 2005 Elsevier Inc. All rights reserved.