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case closed: missing neutrinos found
Thermonuclear reactions at the center of the sun should produce up to
three times as many neutrinos as neutrino hunters on Earth have been able
to account for. But the latest results from the Sudbury Neutrino Observatory
(SNO) prove that because they "change their stripes" on their
way from the sun to the Earth, many neutrinos have been able to hide from
detectors — until SNO
caught them in the act.
secrets
of weak-field NMR
Nuclear magnetic resonance spectroscopy is often limited to samples that
can be placed inside a big, expensive, high-field magnet. Now scientists
have found a way to acquire chemical information with magnetic
fields a million times weaker. The secret is to use a SQUID, the most
sensitive magnetic field detector ever devised — plus a few other
tricks..
inside
Yucca Mountain
On the surface, Yucca Mountain is bone dry. But determining whether the
mountain is a good place to store radioactive waste means finding out if
and when waste could ever reach the water table, hundreds of meters underground.
Geologists are collecting data from maps, deep boreholes, and tunnels to
understand how
moisture moves through the mountain's layers of rock.
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