2018/03/28 by Nanette N. Jarenwattananon, Jarenwattananon, Nanette N., Louis-S. Bouchard +1
Physics and Astronomy · #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Other Condensed Matter (cond-mat.other) #cond-mat.mes-hall #cond-mat.other
paper · pdf · doi:10.48550/arxiv.1803.10413
arxiv created 2018/03/28 · arxiv updated 2018/03/29
The Carr-Purcell Meiboom-Gill (CPMG) experiment has been used for decades to measure nuclear-spin transverse (T2) relaxation times. In the presence of magnetic-field inhomogeneities, the limit of short interpulse spacings yields the intrinsic T2 time. Here we show that the signal decay in such experiments exhibits fundamentally different behaviors between liquids and gases. In gases, CPMG unexpectedly fails to eliminate the inhomogeneous broadening due to the non-Fickian nature of the motional averaging.