1A distribution of electric charge or magnetization consisting of four equal monopoles, or two equal dipoles, arranged close together with alternating polarity and operating as a unit.
- ‘The two populations differ in their averaged quadrupole splitting and in their 2 H chemical shift values.’
- ‘The deuterium quadrupole echo spectra of the two samples are presented in Fig.7.’
- ‘Such simulations can, however, display rapid small amplitude motions that modulate the quadrupole interaction about its average.’
- ‘Lowering the temperature appears to substantially shorten the quadrupole echo decay time of the prominent doublet component.’
- ‘For this protein, representation of its electrostatic properties by a quadrupole moment seems more appropriate.’
- ‘Motions that change the quadrupole interaction while an echo is being formed contribute to echo decay.’
- 1.1A device using a quadrupole directed at one point to focus beams of subatomic particles.
- ‘The plot in Fig.2 has a striking qualitative similarity to the observed NMR quadrupole splittings.’
- ‘We have used a microfabricated planar quadrupole as a test bed for evaluating DEP-based traps, using polystyrene beads as a model for cells.’
- ‘In Q-Tof mass spectrometers ions are focused by a radio frequency lens before transmission to the quadrupole.’