Quantcast

Latest Leptons Stories

Relativity Corrections Could Explain Faster Than Light Neutrinos
2011-10-18 04:47:05

When researchers at the European Center for Nuclear Research (CERN) observed what they believed to be sub-atomic particles moving faster than the speed of light, some believed that the discovery could challenge the very fundamental laws of the universe. It appears that those concerns were unfounded, as new research from scientists has shed light on exactly why CERN officials believe they witnessed beams of tiny particles of neutrinos traveling 60 nanoseconds (or 60 billionths of a second)...

2011-10-14 20:49:05

A research group led by ETH Zurich has now, for the first time, visualized the motion of electrons during a chemical reaction. The new findings in the experiment are of fundamental importance for photochemistry and could also assist the design of more efficient solar cells. In 1999, Ahmed Zewail was awarded the nobel prize in chemistry for his studies of chemical reactions using ultrashort laser pulses. Zewail was able to watch the motion of atoms and thus visualize transition states on...

2011-10-07 13:39:42

Using one of the most sensitive neutrino detectors on the planet, an international team including physicists Laura Cadonati and Andrea Pocar at the University of Massachusetts Amherst are now measuring the flow of solar neutrinos reaching earth more precisely than ever before. The detector probes matter at the most fundamental level and provides a powerful tool for directly observing the sun´s composition. Pocar, Cadonati and colleagues report in the current issue of Physical Review...

2011-09-06 11:38:03

They were always mysterious. 26 years had to pass before the prediction of theoretical physics was confirmed and the existence of neutrinos was finally proven experimentally in 1956. The reason for this ordeal: Neutrinos only interact by the weak interaction with other particles of matter. When a cosmic neutrino approaches the earth, it has the best chance of passing through the whole globe unhindered. It is correspondingly difficult to find direct evidence of neutrinos with the help of a...

2011-08-16 23:11:25

Scientists can now look deeper into new materials to study their structure and behavior, thanks to work by an international group of researchers led by UC Davis and the Lawrence Berkeley National Laboratory and published Aug. 14 by the journal Nature Materials. The technique will enable more detailed study of new types of materials for use in electronics, energy production, chemistry and other applications. The technique, called angle-resolved photoemission, has been used since the 1970s to...

6fcf194a9205936e99f28b4639c13940
2011-08-16 10:55:00

A new Chinese experiment could help explain why matter predominates over antimatter in the universe. The Daya Bay experiment aims to explain the mystery by using antineutrinos as a probe to measure a crucial type of transformation called neutrino mixing. "Right now there is not a good understanding of what causes the matter-antimatter imbalance in the universe," Karsten Heeger, a University of Wisconsin"“Madison physics professor and one of the leading scientists in the experiment,...

2011-08-01 14:32:23

A new source of very cold electrons will improve the quality and speed of nanoimaging for drug and materials development, to a trillionth of a second. The study published in Nature Physics today was carried out by researchers from the ARC Centre of Excellence for Coherent X-ray Science (CXS), headquartered at the University of Melbourne. Associate Professor Robert Scholten from the University's School of Physics  and the CXS, said the new cold electron source offered potential advances...

2011-07-20 14:47:54

A violation of one of the oldest empirical laws of physics has been observed by scientists at the University of Bristol. Their experiments on purple bronze, a metal with unique one-dimensional electronic properties, indicate that it breaks the Wiedemann-Franz Law. This historic discovery is described in a paper published today in Nature Communications.In 1853, two German physicists, Gustav Wiedemann and Rudolf Franz, studied the thermal conductivity (a measure of a system's ability to...

2011-06-27 12:22:34

Scientists of the MINOS experiment at the Department of Energy's Fermi National Accelerator Laboratory announced today (June 24) the results from a search for a rare phenomenon, the transformation of muon neutrinos into electron neutrinos. The result is consistent with and significantly constrains a measurement reported 10 days ago by the Japanese T2K experiment, which announced an indication of this type of transformation. The results of these two experiments could have implications for our...


Latest Leptons Reference Libraries

4_ca2a430d92c0a654eab512344edfa0dd2
2004-10-19 04:45:41

Solar Radiation -- Solar radiation is radiant energy emitted by the sun due to nuclear fusion reactions. Fusion is the process whereby stars produce huge quantities of energy from the fusion of hydrogen or helium, in one of the most efficient processes of energy generation. The radiation referred to is usually electromagnetic energy, particularly infrared radiation, visible light, and ultraviolet. Some stars are known to emit radiation of other wavelengths. Solar neutrinos are a...

More Articles (1 articles) »
Word of the Day
holluschickie
  • A 'bachelor seal'; a young male seal which is prevented from mating by its herd's older males (mated bulls defending their territory).
This comes from the Russian word for 'bachelors.'
Related