Second harmonic out-of-phase (SH-90) signal, together with first harmonic in phase (FH-0) component can give precious information about the relaxation times, in particular the transverse relaxation time T2. In this work we took advantage of the numerical solution of the modified Bloch equations in which the modulation field was included. In details, we investigated the dependence of this EPR signal component on microwave power and modulation amplitude for various values of the relaxation times T1 and T2. These trends have been compared with the corresponding trends of the first harmonic in phase (FH-0) component.
Marrale, M., Longo, A., Barbon, A., Brustolon, M., Brai, M. (2014). Out-of-phase second harmonic detection as a tool for the determination of relaxation times. RADIATION AND ENVIRONMENTAL BIOPHYSICS, 42-42 [10.1007/s00411-014-0533-x].
Out-of-phase second harmonic detection as a tool for the determination of relaxation times
MARRALE, Maurizio
;LONGO, Anna;BRAI, Maria
2014-05-01
Abstract
Second harmonic out-of-phase (SH-90) signal, together with first harmonic in phase (FH-0) component can give precious information about the relaxation times, in particular the transverse relaxation time T2. In this work we took advantage of the numerical solution of the modified Bloch equations in which the modulation field was included. In details, we investigated the dependence of this EPR signal component on microwave power and modulation amplitude for various values of the relaxation times T1 and T2. These trends have been compared with the corresponding trends of the first harmonic in phase (FH-0) component.
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