14N nuclear quadrupole resonance of p-nitrotoluene using a high-Tc rf SQUID

被引：2
|
作者：
He, D. F.
Tachiki, M.
Itozaki, H.
机构：
[1] Supercond Mat Ctr, Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan
[2] Osaka Univ, Grad Sch Sci Engn, Toyonaka, Osaka 5608531, Japan
来源：
SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2007年 / 20卷 / 03期
关键词：
D O I：
10.1088/0953-2048/20/3/020
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Using a high-T-c radio-frequency superconducting quantum interference device (rf SQUID), we successfully detected nuclear quadrupole resonance (NQR) at about 887 kHz for N-14 in p-nitrotoluene (PNT). A normal metal transformer made of copper wire was used to improve the sensitivity of the high-T-c rf SQUID and pulse-controlled rf switches and cross diodes were inserted in the transformer to reduce the influence of the strong excitation field. The preliminary results for NQR detection using the high-T-c SQUID had a similar signal-to-noise ratio to that of using a low noise preamplifier.
引用
收藏
页码：232 / 234
页数：3
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