Fig. 6.

Hp ¹³¹Xe NMR spectra collected from a 5 mm (4.1 mm inner diameter) plain NMR tube (A) in the absence of water vapor and (B) with 3.1 kPa of H₂O. Both spectra were collected at a pressure of 100 kPa of mixture I (5% xenon) at 14.1 T with ¹³¹Xe frequency of 49.47 Hz. (A) The measured quadrupolar splitting was 5.24 Hz. (B) The measured quadrupolar splitting was 4.46 Hz under conditions identical to (A) except for the admission of water vapor (3.1 kPa) prior to hp ¹³¹Xe delivery.