Engineering topics
Wilson, R. Mark
Publications and source records attributed to Wilson, R. Mark.
Smaller, faster, cheaper detection of radiocarbon
A compact spectroscopic system can measure radioactive carbon dioxide concentrations as low as five parts per quadrillion.
An atomic-scale optical modulator
The movement of a few metal atoms in a narrowly tapered waveguide dramatically alters the transmission of light through it.
A quantum cascade laser gets a geometric makeover
A change in the cross section and orientation of the laser’s optical cavity collimates an otherwise highly divergent terahertz-frequency beam.
Thermodynamic simulations explain the Moon’s composition
According to the simulations, more than half of the Moon accreted from volatile-poor molten rock that orbited Earth for decades following a giant impact.
A femtosecond laser pulse makes molecular bonds
The shape of the pulse determines the quantum state and stability of the newly formed molecules.
New hydrogen-isotope measurements refine the picture of water on Mars
Atmospheric maps and in situ spectrometry of clay minerals constrain climate models and the prevalence of water in the planet’s ancient past.
Rosetta’s comet is rich in deuterium
No abstract prepared.
A deep earthquake goes supershear
Seismic analysis of an aftershock off Russia’s Kamchatka Peninsula offers evidence that deep earthquakes are more complicated than geoscientists realized.
Ultrafast electron diffraction from an ultracold source
Femtosecond electron bunches extracted from a laser-cooled gas cloud could become a powerful tool for macromolecular studies.
Nuclear magnetic resonance takes a reaction’s temperature
A new technique exploits the inverse relation between temperature and the linewidth of a proton resonance.