T-1P SPACE DEPENDENCE IN RIGID POLYMERS BY EFFECTIVE RADIO-FREQUENCY GRADIENT

An extension of the solid-state nuclear magnetic resonance (NMR) imagi ng based on magic angle in the rotating frame (MARF) line narrowing ap proach is presented. The modified magic angle in the rotating frame im aging sequence is able to yield T-1p maps of large band polymers with remarkable contrast sensitivity and without contrast parameter alterat ion referable to the narrowing procedure,This last feature is examined closely in order to outline the actual effectiveness of the method. F urther experimental details, especially regarding probe coil design, r ecently improved, are discussed and some new results are presented. (C ) 1998 Elsevier Science Inc.