Concept

Even and odd atomic nuclei

Related publications (46)

Improving Sensitivity in Solid State NMR

Sensitivity in Nuclear Magnetic Resonance (NMR), especially in solid-state NMR, has always been a challenging and important issue and thus a motivation for new developments. The magnetic field B0, the gyromagnetic ratios of the observed nuclei, as well as ...

EPFL2012

NMR of Insensitive Nuclei Enhanced by Dynamic Nuclear Polarization

Geoffrey Bodenhausen, Lothar Helm, Pascal Miéville, Sami Jannin

Despite the powerful spectroscopic information it provides, Nuclear Magnetic Resonance (NMR) spectroscopy suffers from a lack of sensitivity, especially when dealing with nuclei other than protons. Even though NMR can be applied in a straightforward manner ...

Schweizerische Chemische Gesellschaft2011

Proton hyperpolarisation preserved in long-lived states

Geoffrey Bodenhausen, Sami Jannin, Paul Romeo Vasos, Riddhiman Sarkar, Puneet Ahuja

The polarisation of abundant protons, rather than dilute nuclei with low gyromagnetic ratios, can be enhanced in less than 10 min using dissolution DNP and converted into a long-lived state delocalised over an ensemble of three coupled protons. The process ...

2010

Submicro- and Nano-Structured Porous Materials for Production of High-Intensity Exotic Radioactive Ion Beams

Sandrina Fernandes

ISOLDE, the CERN Isotope Separator On-line DEvice is a unique source of low energy beams of radioactive isotopes - atomic nuclei that have too many or too few neutrons to be stable. The facility is like a small 'chemical factory', giving the possibility of ...

EPFL2010

Apparent transverse relaxation rates in systems with coupled carbon-13 spins

Geoffrey Bodenhausen, Nicolas Aeby

In systems with homonuclear scalar couplings, the envelopes of spin echoes obtained with simple refocusing pulses or trains of such pulses are normally modulated so that it is difficult to extract transverse relaxation rates. It has been shown recently tha ...

Royal Society of Chemistry2010

Surface Enhanced NMR Spectroscopy by Dynamic Nuclear Polarization

David Lyndon Emsley, Geoffrey Bodenhausen, Pascal Miéville, Moreno Lelli, Marc Anthony Caporini, David Benjamin Roger Antoine Gajan, Mehdi Ahmadi

It is shown that surface NMR spectra can be greatly enhanced using dynamic nuclear polarization. Polarization is transferred from the protons of the solvent to the rare nuclei (here carbon-13 at natural isotopic abundance) at the surface, yielding at least ...

American Chemical Society2010

Analysis of labelled compounds by mass spectroscopy in the presence of heavy isotopes at natural abundance: the NAIC program

A program is described, which allows the intensity contributions from naturally occurring heavy isotopes to be eliminated from the mass spectrometric ions of an artificially labelled compound. This allows the accurate measurement of the isotopomer distribu ...

2009

Ligand exchange and complex formation kinetics studied by NMR exemplified on fac-[(CO)3M(H2O)]+ (M = Mn, Tc, Re)

Lothar Helm

In this review ligand exchange and complex formation reactions on fac-[(CO)3M(H2O)3]+ (M = Mn, Tc, Re) and on fac-[(CO)2(NO)Re(H2O)3]2+ are presented. A variety of experimental NMR techniques are described and it is shown that sometimes combinations of tec ...

2008

Principles of spin-echo modulation by J-couplings in magic-angle-spinning solid-state NMR

David Lyndon Emsley

In magic angle spinning solid-state NMR, the homonuclear J-couplings between pairs of spin-1/2 nuclei may be determined by studying the modulation of the spin echo induced by a pi-pulse, as a function of the echo duration. We present the theory of J-induce ...

WILEY-V C H VERLAG GMBH2004

The commensurate composite sigma-structure of beta-tantalum

Gervais Chapuis, Alla Arakcheeva, Philip Pattison

The single-crystal investigation of the self-hosting sigma-structure of beta-tantalum (beta-Ta) at 120 K (low-temperature, LT, structure) and at 293 K (RT-I before cooling and RT-II after cooling and rewarming; RT represents room temperature) shows that th ...

2003

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