spallation


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Related to spallation: Spallation reaction

spallation

(spă-lay -shŏn) A particularly vigorous type of nuclear reaction in which several particles or nuclei result from a high-speed collision. Spallation occurs when cosmic rays collide at high speed with atomic nuclei, the heavier nuclei breaking up to produce lighter nuclei.

spallation

[spȯ′lā·shən]
(nuclear physics)
A nuclear reaction in which the energy of the incident particle is so high that more than two or three particles are ejected from the target nucleus and both its mass number and atomic number are changed. Also known as nuclear spallation; spallation reaction.
References in periodicals archive ?
We propose a parasitic use of spallation neutrons from a target of the 400 MeV proton beam in the ADS/TEF-T (Accelerator-Driven System/Transmutation Experimental Facility-T) beam line with minimum disturbance.
The European Spallation Source (ESS) will be a multi-disciplinary research laboratory based on the world's most powerful neutron source.
At the end of the MPST and despite the fact that dense diagonal cracks were observed in the coatings deposited at high currents, spallation was observed in the coatings deposited at low currents.
The expected increased accuracy of neutron [beta]-decay experiments at the new Spallation Neutron Source could result in more stringent tests of the Standard Model.
The book looks at what would be the political, social, economic and scientific effects on the Oresund Region (which consists of Copenhagen in Denmark, Malmo in Sweden and the stretch of water in between) of a large scientific research centre looking at spallation, a technique that creates neutrons with the minimum of radioactive danger.
We monitored AE signals during micro-indentation and pulse laser spallation test of CVD diamond film deposited on sintered SiC, and classified the fracture type by Lamb wave AE analysis.
A beamline at the most advanced neutron spallation installation in the world, at Oak Ridge, TN, to secure the leadership of Canadian researchers in using neutrons to look at engineering materials; and
aircraft engine tests, conducted by Sandia National Laboratories, slammed a 4,000-pound jet engine into a 24-inch-thick concrete wall at 240 mph, resulting in extensive cracking and spallation (concrete pieces on the inside of the wall become dislodged and airborne), but no penetration.
Currently under construction at the Oak Ridge National Laboratory Complex in Tennessee, the Spallation Neutron Source may advance science and engineering with microscopic details about the underlying structure and dynamics of the sample.
This tubing has a life 18 times longer than silicone tubing, the ability to withstand pressures up to 60psi, and eliminates spallation and interior tube degradation to give contamination-free pumping, they tell us.
The budget also includes $214 million for the Spallation Neutron Source and operating funds for a large number of scientific user facilities slated to come on line in FY 2000.