Application of microwave amplitude modulation technique to measure spin-lattice and spin-spin relaxation times accurately with a continuous-wave EPR spectrometer: Solution of Bloch’s equations by a matrix technique and least-squares fitting

2005 ◽  
Vol 28 (1-2) ◽  
pp. 55-67 ◽  
Author(s):  
S. K. Misra
Keyword(s):  
Least Squares ◽  
Spin Relaxation ◽  
Amplitude Modulation ◽  
Continuous Wave ◽  
Relaxation Times ◽  
Least Squares Fitting ◽  
Spin Lattice ◽  
Modulation Technique

X-band rapid-scan EPR of samples with long electron spin relaxation times: a comparison of continuous wave, pulse and rapid-scan EPR

2013 ◽  
Vol 111 (18-19) ◽  
pp. 2664-2673 ◽  
Author(s):  
Deborah G. Mitchell ◽  
Mark Tseitlin ◽  
Richard W. Quine ◽  
Virginia Meyer ◽  
Mark E. Newton ◽  
...  
Keyword(s):  
Spin Relaxation ◽  
Electron Spin ◽  
Continuous Wave ◽  
Relaxation Times ◽  
Electron Spin Relaxation ◽  
Wave Pulse ◽  
Rapid Scan ◽  
X Band

Relaxationszeiten des Elektronenspins von Radikalen in einigen bestrahlten Aminosäuren bei 4,2 °K

1966 ◽  
Vol 21 (3) ◽  
pp. 296-300 ◽  
Author(s):  
G. Bürk ◽  
G. Schoffa
Keyword(s):  
Amino Acids ◽  
Spin Relaxation ◽  
Relaxation Times ◽  
Lattice Relaxation ◽  
Spin Lattice Relaxation ◽  
Electron Spin Relaxation ◽  
Spin Lattice ◽  
Saturation Method ◽  
Rapid Adjustment ◽  
Inhomogeneous Line Broadening

Electron spin relaxation times of the irradiated amino acids acetyl valine, sarcosine, betaine, and glycine have been measured at 4.2 °K with two different methods. From the exponential decrease of signals due to saturation after rapid adjustment of the ESR spectrometer on resonance, the following spin-lattice relaxation times have been measured: acetyl valine T1= 0.2 sec, sarcosine T1=0.14 sec, betaine T1=0.07 sec, glycine T1 ∼ 0.3 sec. By the PORTIS saturation method the product T1 T2 was measured, and, T1 being known, the following spin-spin relaxation times T2 have been obtained: acetyl valine 2.1.10-9sec, sarcosine 1.10-9sec, betaine 9.10-10sec. All measured amino acids show the saturation behaviour of substances with “inhomogeneous” line broadening.

Proton spin-lattice and spin-spin relaxation times of (N(CH3)3H)(I)(TCNQ)

1978 ◽  
Vol 18 (5) ◽  
pp. 2046-2049 ◽  
Author(s):  
Michael F. Froix ◽  
Arthur J. Epstein ◽  
Joel S. Miller
Keyword(s):  
Spin Relaxation ◽  
Relaxation Times ◽  
Proton Spin ◽  
Spin Lattice
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