NQR Studies of Atomic Arrangements
نویسندگان
چکیده
A very high sensitivity continuous wave NQR spectrometer was developed to detect pure NQR transitions at low frequencies (down to 200 kHz). A signal-to-noise ratio of more than 100 to 1 has been achieved at about 1.36 MHz for crystalline B 2 0 3 . Two large n B responses have been found in vitreous B 2 0 3 (NMR detected only one site) with linewidths of less than 30 kHz. A1 NQR spectra were obtained for O C A 1 2 0 3 (Corundum), the mineral andalusite (a form of A 1 2 0 3 • Si0 2 ) , and a glass having the composition of anorthite (CaO • A 1 2 0 3 • 2S i0 2 ) .
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