The absorption signal of a Fe metal foil placed behind the sample was used for a precise (+/− 0.1 eV) calibration of the energy position of each individual energy scan.
"They made all this food just for you!" Seventeen competitors stood behind foil chafing dishes and handmade signs, doling out their creations.
The glittering quality, which seems as alluring to insects as it is to many people, is achieved by making the diodes flash and reflecting their light from a piece of aluminium foil that dangles behind the slot.
Noam Pikelny, the banjoist, played the foil, delivering saturnine jokes behind the beat.
The gold atoms deflected the barrelling particles and sent them crashing into a photographic plate placed behind the foil.
A needle of ∼30 μm diameter is positioned on-axis right behind the foil, creating a radial electric field that deflects the secondary electrons radially outward so as to miss the sample and to hit the micro-channel plate (MCP) detector placed down beam.
At one of McCloud's book signing events, I observed people first approaching the paintings to see what's hiding behind the foil, then, catching their own reflections, stepping back to gaze into that incidental mirror.
Moisture ruins costume jewelry because it gets behind the foil causing it to tarnish and darken.
The days of 'Red Ed', the detached, geeky foil for David Cameron are long behind him and, judging by his speech to the Labour party conference on Tuesday, he is determined to reinvent his party as well.
The police did not deny that detectives were confounded, particularly by the possibility that the gunman might have fired a high-powered weapon from behind cover to foil being seen by witnesses.
