000080331 001__ 80331
000080331 005__ 20181203020240.0
000080331 0247_ $$2doi$$a10.1006/jmra.1995.1123
000080331 037__ $$aARTICLE
000080331 245__ $$aAdiabatic coherence transfer in magnetic resonance of homonuclear scalar-coupled systems
000080331 269__ $$a1995
000080331 260__ $$c1995
000080331 336__ $$aJournal Articles
000080331 520__ $$aBy analogy to heteronuclear systems, coherence can be transferred adiabatically in the rotating frame between two selected spins I and S belonging to a homonuclear network of scalar-coupled spins. In contrast to cross polarization with const. radiofrequency field amplitudes, the transfer function obtained with adiabatic methods depends in a monotonic, nonoscillatory manner on the duration of the transfer interval. The efficiency of the transfer does not depend on the magnitude of the scalar coupling const. JIS, although it can be affected by relaxation and by couplings JIR and JSR to further spins R. Three methods were studied: (i) adiabatic demagnetization of spin I in the rotating frame followed by observation of the resulting J-ordered state, (ii) adiabatic demagnetization of spin I in the rotating frame followed by adiabatic remagnetization of spin S, and (iii) adiabatic transfer were spins I and S are subjected simultaneously to time-dependent spin-locking fields. In all three cases, the optimum shape of the time dependence of the radiofrequency field amplitudes is discussed, with the help of a geometric interpretation of cross polarization. [on SciFinder (R)]
000080331 700__ $$aKurur, Narayanan D.
000080331 700__ $$0243177$$aBodenhausen, Geoffrey$$g122795
000080331 773__ $$j114$$k2$$q163-73$$tJournal of Magnetic Resonance, Series A
000080331 909C0 $$0252152$$pLRMB$$xU10098
000080331 909CO $$ooai:infoscience.tind.io:80331$$pSB$$particle
000080331 937__ $$aLRMB-ARTICLE-1995-001
000080331 970__ $$a119/LRMB
000080331 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000080331 980__ $$aARTICLE