Quadrupole parameters of 11B in crystalline CaO·B2O3

✍ Scribed by Degen Mao; Philip J. Bray

• Book ID: 103963678
• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 444 KB
• Volume: 1
• Category: Article
• ISSN: 0926-2040
• DOI: 10.1016/0926-2040(92)90045-b

✦ Synopsis

The quadrupole coupling constant (Qcc) and asymmetry parameter (eta) of 11B in crystalline CaO.B2O3 have been measured employing three different NQR and NMR methods: (1) 11B and 10B NQR; (2) 11B NQR and NMR; and (3) the 11B Zeeman NQR powder pattern. It is found that Qcc = 2594.3 +/- 0.5 kHz and eta = 0.515 +/- 0.001 at 77 K, and Qcc = 2573.5 +/- 0.5 kHz and eta = 0.511 +/- 0.002 at 300 K. These values are in agreement with, but far more accurate than, values obtained from a fourth procedure: measurement of the second-order quadrupolar effects evident in the m = + 1/2<-->m = - 1/2 transition of the 11B NMR spectrum.