Exploiting Spin Echo Decay in the Detection of Nuclear Quadrupole Resonance Signals

2007 ◽  
Vol 45 (4) ◽  
pp. 925-933 ◽  
Author(s):  
Samuel D. Somasundaram ◽  
Andreas Jakobsson ◽  
John A. S. Smith ◽  
Kaspar Althoefer
Keyword(s):  
Nuclear Quadrupole Resonance ◽  
Spin Echo ◽  
Quadrupole Resonance ◽  
Nuclear Quadrupole

scholarly journals Low Frequency Nuclear Quadrupole Resonance with SQUID Amplifiers

1994 ◽  
Vol 49 (1-2) ◽  
pp. 5-13 ◽  
Author(s):  
John Clarke
Keyword(s):  
Nuclear Quadrupole Resonance ◽  
Quantum Interference ◽  
Spin Echo ◽  
Relaxation Times ◽  
Noise Temperature ◽  
Low Frequency ◽  
Input Circuit ◽  
Transverse Relaxation ◽  
Quadrupole Resonance ◽  
Nuclear Quadrupole

Abstract The dc SQUID (Superconducting QUantum Interference Device) can be configured as an ampli­fier of spin-echos with a noise temperature of approximately 10 mK (f/1 M Hz) at an operating temperature of 1.5 K. A Fourier transform spectrometer based on a SQUID with a superconducting input circuit and operated in a flux-locked loop is used to obtain nuclear quadrupole resonance (NQR) spectra in a broadband m ode over the bandwith 0 -1 M Hz. Spin-echo spectra of 14N in NH4ClO4 reveal sharp NQR resonances, obtained simultaneously, at 17.4, 38.8 and 56.2 kHz. At 1.5 K, the measured longitudinal and transverse relaxation times T1 and T2 for the 38.8 kHz transition are 63 ± 3 ms and 22±2 ms, respectively.

Remote nuclear quadrupole resonance in solids

1993 ◽  
Vol 163 (10) ◽  
pp. 95 ◽  
Author(s):  
Vadim S. Grechishkin ◽  
Nikolai Ya. Sinyavskii
Keyword(s):  
Nuclear Quadrupole Resonance ◽  
Quadrupole Resonance ◽  
Nuclear Quadrupole
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