Once freed from its home inside the nucleus of an atom, a neutron lives on average 886.8 seconds (about 14.8 minutes), plus or minus 3.4 seconds, according to recent measurements performed at the National Institute of Standards and Technology.
This result, published in the Oct. 10 issue of Physical Review Letters, is the most precise ever achieved using beams of neutrons and is the culmination of almost 10 years of work. The new neutron lifetime value is consistent with physicists current theories about the particles and forces of nature. It also will help scientists better understand the creation of matter immediately after the birth of the universe, an important factor in determining what the universe is made of today.
Scientists have been measuring the lifetime of the neutron since the early 1950s. While slightly less precise than a measurement made in 2000 by a different research group using a different method, the in-beam technique provides a strong, independent check on the neutron lifetime and reduces the overall uncertainty in the recommended value.
Laura Ost | EurekAlert!
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21.07.2017 | American Institute of Physics
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21.07.2017 | National Institutes of Natural Sciences
Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.
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The research team of Prof. Dr. Oliver Einsle at the University of Freiburg's Institute of Biochemistry has long been exploring the functioning of nitrogenase....
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Physics supports biology: Researchers from PTB have developed a model system to investigate friction phenomena with atomic precision
Friction: what you want from car brakes, otherwise rather a nuisance. In any case, it is useful to know as precisely as possible how friction phenomena arise –...
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