The dc SQ U ID (Superconducting QUantum Interference Device) can be configured as an ampli­ fier of spin-echos with a noise temperature of approximately 10 mK (f/1 MHz) at an operating temperature of 1.5 K. A Fourier transform spectrometer based on a SQ U ID with a superconducting input circuit and operated in a flux-locked loop is used to obtain nuclear quadrupole resonance (NQR) spectra in a ...

The nuclear system is a promising area for demonstrating practical quantum advantage. A comprehensive computation of in classical computer beyond the capacity current computers. With rapid development hardware, prospect using computers physics close at hand. In this paper, we report full package, QCSH, solving shell model computer. QCSH uses linear combination unitary formalism computing and pe...

This paper presents the conceptual stages of simulation and development a modified transceiver antenna for high-power pulsed nuclear quadrupole resonance (NQR) detector explosives containing 14N isotope. At frequency 4.645 MHz, better characteristics are obtained using nine-turn coil shaped as half Fermat spiral with an outer radius 75 mm. Using COMSOL Multiphysics numerical parametric material...

We present a proton-selective method to determine 17O-1H distances in organic, biological, and biomimetic materials by fast magic-angle-spinning solid-state NMR spectroscopy. This method allows the determination of internuclear distances between specific (17O, 1H) spin pairs selectively. It enables the estimation of medium-range 17O...1H distances across hydrogen bonds in the presence of short-...

In this contribution we present a comprehensive approach to study hydrogen bonding in biological and biomimetic systems through 17O and 17O-1H solid-state NMR combined with density functional theory calculations of 17O and 1H NMR parameters. We explore the signal enhancement of 17O in L-tyrosine.HCl using repetitive double-frequency swept radio frequency pulses in solid-state NMR. The technique...

We have used solid-state 17O NMR experiments to determine the 17O quadrupole coupling (QC) tensor and chemical shift (CS) tensor for the carbonyl oxygen in p-nitro-[1-(17)O]benzaldehyde. Analyses of solid-state 17O NMR spectra obtained at 11.75 and 21.15 T under both magic-angle spinning (MAS) and stationary conditions yield the magnitude and relative orientation of these two tensors: CQ = 10.7...