NUCLEAR MAGNETIC RESONANCE OF SOLID HYDROGEN (67-86% ORTHO) AND SOLID DEUTERIUM (33% AND 55% PARA)
Nuclear magnetic resonance studies on solid hydrogen (H/sub 2/) of ortho concentrations from 67 to 86% and of solid deuterium (D/sub 2/) with para concentrations of 33 and 55 re reported. The method of Cunningham, Chapin, and Johnston was used to produce the high concentrations ortho H/sub 2/ and para D/sub 2/. The temperature (T/sub lambda /) of appearance of side peaks associated with the removal of rotational degeneracy in H/sub 2/ was found to shift to 2.18 deg K for 86% ortho as compared to a value of 1.6 deg K for the normal concentration. The T/sub lambda / versus concentration data were found to join smoothly to the lower concentration work of Sugawara et al. In addition an interesting hysteresis phenomenon was observed for H/sub 2/. It was noted that the temperature of appearance of the side peaks when the H/sub 2/ is cooled is some 0.15 deg K lower than the temperature of their disappearance when the temperature is slowly raised. In the case of deuterium, no peaks were observed for either 33 or 55% para D/sub 2/ at temperatures down to 0.9 deg K. T/sub 1/ was measured roughly for the two concentrations. For n -- D/sub 2/, T/sub 1/ was found to be 7.6 plus or minus 3 sec. This compares well with the theoretical value of 8 sec given by Moriya and Motizuki. For 55% para-D/sub 2/, a value of 3 plus or minus 1 sec was found. The theory of Moriya and Motizuki gives 5 sec. (auth)
- Research Organization:
- Rice Inst., Houston, Tex.
- NSA Number:
- NSA-14-012115
- OSTI ID:
- 4171902
- Journal Information:
- Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Vol. Vol: 117; Other Information: Orig. Receipt Date: 31-DEC-60
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
Similar Records
THEORY OF ORTHO-PARA HYDROGEN SEPARATION BY ADSORPTION AT LOW TEMPERATURES, ISOTOPE SEPARATION
Purification and low-temperature (15 mK-10 K) NMR of ultra pure ortho-deuterium