http://www.space.com/businesstechnol...et_050804.html
NUGGET (Neutron/Gamma Ray Geologic Tomography), an instrument containing a neutron generator, a neutron lens and a gamma-ray detector, could be used to investigate important biological indicators of life on distant worlds - just like Star Trek's tricorder.
The system provides a three-dimensional scanning instrument that focuses a beam of neutrons into an object. When the nucleus of an atom inside the rock captures the neutrons, it produces a gamma-ray signal for that element, which the gamma-ray detector then analyzes. The location of the elements can also be plotted; nformation can then be turned into an image of the elements within the rock. Scientists could then tell whether a certain type of bacteria had become fossilized inside the rock.
The system provides a three-dimensional scanning instrument that focuses a beam of neutrons into an object. When the nucleus of an atom inside the rock captures the neutrons, it produces a gamma-ray signal for that element, which the gamma-ray detector then analyzes. The location of the elements can also be plotted; nformation can then be turned into an image of the elements within the rock. Scientists could then tell whether a certain type of bacteria had become fossilized inside the rock.
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