Spin-spin relaxation time in water

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SUMMARY

The discussion focuses on the spin-spin (T2) and spin-lattice (T1) relaxation times of pure water in the context of Nuclear Magnetic Resonance (NMR). Participants confirm that these values are influenced by temperature, pulse sequence, and magnetic field strength. While exact values are not provided, it is established that T1 and T2 are material-specific and vary with experimental conditions. The conversation highlights the need for precise conditions when comparing NMR results.

PREREQUISITES
  • Nuclear Magnetic Resonance (NMR) fundamentals
  • Understanding of spin-spin and spin-lattice relaxation times (T1 and T2)
  • Knowledge of how temperature affects NMR measurements
  • Familiarity with pulse sequences in NMR experiments
NEXT STEPS
  • Research the impact of temperature on T1 and T2 values in NMR
  • Explore different pulse sequences used in NMR and their effects on relaxation times
  • Investigate the relationship between magnetic field strength and NMR signal quality
  • Review literature on NMR relaxation times for various materials
USEFUL FOR

Students and researchers in the fields of chemistry and physics, particularly those involved in NMR spectroscopy and material characterization.

KBriggs
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Hey all,

I just finished a lab on NMR, and I am looking around for a value to compare my results to. Does anyone know of a place I can find the spin-spin and spin-lattice relaxation times of pure water? I have been googling around with little success so far beyond order of magnitude estimates.

Thanks,
KBriggs
 
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It's been a while since I studied NMR, but don't the exact values of T1 and T2 depend on the temperature, pulse sequence and frequency/field strength?
 
The crash course in theory I was given before the lab suggests that t1 and t2 are characteristic of the material being studied, while the magnetic field used dictates the length of the pulses needed to flip the net magnetization around in the sample, and temperature serves to mess with the uniformity of the magnetic field. So while these things will certainly effect your results, it would not ideally be the case. That said, I have not actually studied the theory in any detail in any point in my education so far, so that could be way off (the labs at my school are good like that...)
 

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