Eur. Phys. J. Appl. Phys.
Volume 42, Number 3, June 2008
|Page(s)||321 - 326|
|Section||Imaging, Microscopy and Spectroscopy|
|Published online||06 May 2008|
Relaxation-diffusion processes in natural porous media: sedimentary rocks
Universidad Central de Venezuela, Facultad de Ciencias, Escuela de
Física, Centro de Física Molecular y Médica, Laboratorio de
Física Molecular, Caracas, Venezuela
2 Instituto de Ciencias de la Tierra, Caracas, Venezuela
Corresponding author: email@example.com
Revised: 1 March 2008
Accepted: 5 March 2008
Published online: 6 May 2008
Carr-Purcell-Meiboom-Gill (CPMG) experiments were made upon sedimentary rock samples at different RF pulsation rates. A dispersion of the transversal relaxation rate was observed. The experiments revealed that due to the diffusional processes there is a diminution of the second moment of the absorption line with the delay time between the RF pulses and the echo time, with a complex evolution characterized either as a stretched exponential or a power-law behavior as a function of the echo time, with parameters dependent on the characteristic time of the experiment, i.e., the delay between RF pulses. Results show that the observed behavior is dependent on permeability and geometrical properties of the sedimentary rock.
PACS: 33.25.+k – Nuclear resonance and relaxation / 76.60.Es – Relaxation effects / 76.60.Lz – Spin echoes / 82.56.Lz – Diffusion
© EDP Sciences, 2008
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.