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!
Breakthrough with a chain of gold atoms
17.02.2017 | Universität Konstanz
New functional principle to generate the „third harmonic“
16.02.2017 | Laser Zentrum Hannover e.V.
In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport
Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...
The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.
The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...
Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...
Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".
Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...
13.02.2017 | Event News
10.02.2017 | Event News
09.02.2017 | Event News
17.02.2017 | Medical Engineering
17.02.2017 | Medical Engineering
17.02.2017 | Health and Medicine