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A study of the field gradients at
39
K nuclei surrounding a substituted Na
+
ion in a single crystal of KF by nuclear magnetic pulsed double resonance. ACTA ACUST UNITED AC 1997. [DOI: 10.1098/rspa.1968.0091] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
A high-sensitivity nuclear magnetic pulsed double-resonance technique is described. The method has been used to determine the quadrupole interactions of
39
K nuclei at (1, 1, 0) and (2, 0, 0) lattice sites relative to a substituted Na
+
impurity at (0, 0, 0) in a single crystal of potassium fluoride. The values obtained for the largest principal value of the field gradient tensor are |
Vz'z’
| = 0.163 x 10
14
e. s. u. for the (2, 0, 0) site, and |
Vz'z’
| = 0.131 x 10
14
e. s. u. for the (1, 1, 0) site, with an asymetry parameter
ŋ
= 0.607. These values have been compared with those calculated for a simple ionic model introduced by Das & Dick (1962). In this treatment the maximum number of ions surrounding the impurity which have been allowed to relax is 896. The best overall agreement with experiment occurs when the shell model modification of Dick(1966) to the Tessman, Kahn & Shockley (1953) ionic polarizabilities is chosen. In this case the calculated values are: for the (2, 0, 0) sites |
VZ'Z'
| = 0.097 x 10
14
e. s. u., and for the (1, 1, 0) sites |
Vz'z’
| = 0.106 x 10
14
e. s. u. and
ŋ
= 0.176.
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Schwab M, Hahn EL. Scheme for Sensitive Nuclear Double‐Resonance Detection: Deuterium and 13C. J Chem Phys 1970. [DOI: 10.1063/1.1673451] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Nelson KF, Ohlsen WD. Nuclear Double Resonance Study of Na First-Order Quadrupole Splittings in a NaF-LiF Mixed Crystal. ACTA ACUST UNITED AC 1969. [DOI: 10.1103/physrev.180.366] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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