Abstract
The theory of pulsed-gradient spin-echo NMR in the case of molecules trapped within pores has been extended to include wall-relaxation effects. Expressions are obtained for the echo attenuation under the narrow-gradient-pulse condition for rectangular, cylindrical, and spherical pores. The cylindrical result is new, while those for rectangular and spherical pores differ from previously published formulas. The present results are verified in a number of special limits. It is shown that "diffraction" effects are still strongly apparent when wall relaxation is taken into account. Furthermore, deviations in the pore radius, a, obtained from the position of the echo minimum, are weak in practice, provided that the time between the gradient pulses exceeds a 2/ D, where D is the molecular self-diffusion coefficient.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
