ChemRxiv
These are preliminary reports that have not been peer-reviewed. They should not be regarded as conclusive, guide clinical practice/health-related behavior, or be reported in news media as established information. For more information, please see our FAQs.
1/1
2 files

Rapid Survey of Nuclear Quadrupole Resonance by Broadband Excitation with Comb Modulation and Dual-Mode Acquisition

preprint
submitted on 05.10.2020 and posted on 06.10.2020 by Yuta Hibe, Yasuto Noda, K. Takegoshi, Kazuyuki Takeda
Nuclear Quadrupole Resonance (NQR) provides spectra carrying information as to the electric-field gradient around nuclei with a spin quantum number I > 1/2 and offers helpful clues toward characterizing the electronic structure of materials of chemical interest. A major challenge in NQR is finding hitherto unknown resonance frequencies, which can scatter over a wide range, requiring time consuming repetitive measurements with stepwise frequency increments. Here, we report on an efficient, two-step NQR protocol by bringing rapid-scan and frequency-comb together. In the first step, wideband excitation and simultaneous signal acquisition, both realized by a non-adiabatic, frequency-swept hyperbolic secant (HS) pulse with comb modulation, offers a clue for the existence/absence of the resonance within the frequency region under investigation. When and only when the sign of the resonance has been detected, the second step is implemented to compensate the limited detection bandwidth of the first and to unambiguously determine the NQR frequency. We also study the spin dynamics under the comb-modulated HS pulse by numerical simulations, and experimentally demonstrate the feasibility of the proposed scheme, which is referred to as RApid-Scan with GApped excitation with Dual-mode Operation (RASGADO) NQR

Funding

Improvement of nuclear quadrupolar resonance method

Japan Society for the Promotion of Science

Find out more...

Understanding of Mixed Anion Compounds: Analyses of Chemical, Structural and Electronic States

Japan Society for the Promotion of Science

Find out more...

JSPS Grant-in-Aid for Scientific Research: JP19H05814

History

Email Address of Submitting Author

takezo@kuchem.kyoto-u.ac.jp

Institution

Kyoto University

Country

Japan

ORCID For Submitting Author

0000-0002-6743-0932

Declaration of Conflict of Interest

no conflict of interest

Version Notes

1st version

Exports

Logo branding

Exports