TY - JOUR
T1 - Pressure dependence of the rotational ground state tunnel splitting in Ni(NH3)6I2
AU - Eckert, J.
AU - Youngblood, R.
N1 - Funding Information:
Acknowledgements - The authors are indebted to S. Mroczkowski for preparation of the sample used in this study and to W. Press for many helpful discussions. Work at Brookhaven was supported by the Division of Basic Energy Sciences, U.S. Department of Energy, under Contract No. DE-AC02-76CG00016.
PY - 1982/12
Y1 - 1982/12
N2 - Inelastic neutron scattering techniques have been used to determine the rotational tunnel splitting of the librational ground state of ammonia molecules in Ni(NH3)6I2 as a function of hydrostatic pressure up to 5.6 kbar at 8 K. The resulting exponential dependence of the tunnel splitting on pressure was interpreted with the help of a concurrent measurement of the compressibility to suggest a dependence on the interatomic distance as r-9 of the orientational potential. The phase transition temperature at 5.6 kbar was determined to be 27 K compared with 19.9 K at atmospheric pressure.
AB - Inelastic neutron scattering techniques have been used to determine the rotational tunnel splitting of the librational ground state of ammonia molecules in Ni(NH3)6I2 as a function of hydrostatic pressure up to 5.6 kbar at 8 K. The resulting exponential dependence of the tunnel splitting on pressure was interpreted with the help of a concurrent measurement of the compressibility to suggest a dependence on the interatomic distance as r-9 of the orientational potential. The phase transition temperature at 5.6 kbar was determined to be 27 K compared with 19.9 K at atmospheric pressure.
UR - http://www.scopus.com/inward/record.url?scp=0020279712&partnerID=8YFLogxK
U2 - 10.1016/0038-1098(82)90901-2
DO - 10.1016/0038-1098(82)90901-2
M3 - Article
AN - SCOPUS:0020279712
SN - 0038-1098
VL - 44
SP - 1393
EP - 1396
JO - Solid State Communications
JF - Solid State Communications
IS - 9
ER -