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Calibration of the Stray Field Gradient by a Heteronuclear Method and by Field Profiling

✍ Scribed by Alasdair R Preston; Paul Kinchesh; Edward W Randall

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
62 KB
Volume
146
Category
Article
ISSN
1090-7807

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✦ Synopsis

Heteronuclear and field-profiling stray field (STRAFI) techniques are used to calibrate the STRAFI gradient. Both methods compare very favorably indeed with the conventional method of calibration which uses a standard with a known self-diffusion constant. The distinct advantages of the techniques presented here are that the constraints on both sample purity and sample temperature that are inherent to the conventional method are completely eliminated. The accuracy of the heteronuclear method typically matches that of the conventional method with a pure sample and temperature stability to within 0.4Β°C. The field-profiling method is more accurate than the heteronuclear method in the form that it is presented here.

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