Pulsed 14N NQR Device Designed to Detect Substances in the Presence of Environmental Noise |
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Authors: | Gerünimo E Poletto Tristán M Osán Daniel J Pusiol |
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Institution: | (1) Spinlock S.R.L. C. Arenal 1020 X5000GZU, Córdoba, Argentina;(2) Fa.M.A.F.-U.N.C. Medina Allende s/n X5016LAE, Córdoba, Argentina |
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Abstract: | A new device designed for both volumetric and surface NQR detection of substances spatially located in several positions,
and in the presence of environmental interference, is described. The device consists of two probe coils, placed on the same
detection plane, for excitation and detection of NQR signals. Experimental results obtained using Strong Off Resonance Comb
(SORC) pulse sequences, for the excitation of the ν- transition in samples of Sodium Nitrite (NaNO
2), are presented. It is shown that, when the total signals induced in each coil are properly combined, the interference commonly
detected in both coils is attenuated relative to the NQR signal detected by either one or both probe coils. NQR signal can
be detected by either one or both coils, but in both cases the noise induced by distant environmental sources is attenuated.
These files correspond to the revised version of the paper N° O-G-6, entitled “Pulsed 14N NQR device designed to detect substances in the presence of environmental noise” presented at the XVII International symposium
on Nuclear Quadrupole Interactions, held in Bonn, Germany in 2004.
Argentinian and International patents pending. |
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Keywords: | auto-shielding coils NQR surface coils |
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