Accession Number : AD0608112

Title :   OBSERVATION OF THE LAMBDA ANOMALY IN SOLID D2 BY NUCLEAR MAGNETIC RESONANCE.

Descriptive Note : Technical rept. no. 14,

Corporate Author : OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS

Personal Author(s) : Gaines,J. R. ; de Castro,E. M. ; White,D.

Report Date : OCT 1964

Pagination or Media Count : 14

Abstract : Nuclear resonance studies were made of enriched para D2 samples (with concentration of about 80%) and the splitting of the resonance line in D2 below 2K was observed. A derivative of the resonance line at 4.2K was obtained with a sample containing 81% pD2. This line is actually a superposition of lines arising from molecules with I=2 (orthoD2) and I=1 (para D2). Since the molecules with I=2 have J=0 at these low temperatures, it is not expected that quenching of rotation will have any effect on their contribution to the resonance line, in a first approximation. Reduction of the temperature to about 2.2K revealed the existence of side peaks split apart by (76.8 = 0.5) kc/sec. The calculated value of the splitting is in excellent agreement with the experimental value. After the splitting of the line occurred, several other effects were observed: (i) the signal to noise ratio deteriorated rather badly, (ii) the line became so asymmetric that the recorder trace bore little resemblance to the conventional derivative curve, and (iii) the remnant central line became noticeably broader, with a width of 5-8 gauss.

Descriptors :   (*DEUTERIUM, NUCLEAR MAGNETIC RESONANCE), (*SOLIDIFIED GASES, DEUTERIUM), PHASE STUDIES, TRANSFORMATIONS, LINE SPECTRA, MOLECULAR PROPERTIES, TRANSITION TEMPERATURE, CRYOGENICS

Distribution Statement : APPROVED FOR PUBLIC RELEASE