Sentences with phrase «with radioactive sources»

Both experiments used detectors made of gallium, and when researchers calibrated them with radioactive sources, they counted too few electron neutrinos, suggesting they were quickly morphing into sterile ones.

Assume body «B» is a thin spherical shell (external radius, RI) with a radioactive source (make it an alpha particle emitter so that the energy of the radioactive particles are quickly converted to random molecular motion) uniformly (i.e., symmetrically) distributed throughout the shell wall.

Not exact matches

With dwindling radioactive sources, NASA turns to solar panels to siphon power in the darkest parts of our solar system.

The lasers themselves could be located up to a few hundred meters away from the radioactive source, Isaacs said, as long as line - of - sight was maintained and the air was not too turbulent or polluted with aerosols.

Researchers have proposed a new way to detect radioactive material using two co-located laser beams that interact with elevated levels of oxygen ions near a gamma - ray emitting source.

The EPR authors described a source, such as a radioactive nucleus, that shot out pairs of particles with the same speed but in opposite directions.

«With the existing technologies, remote detection of radioactive materials is impossible when the measurement location is far from the radioactive source,» says Dongsung Kim (Combined M.S. / Ph.D. student of Physics), the first author of the study.

In their study, published in the May issue of the journal, Nature Communications, Professor Eunmi Choi of Natural Science and her team demonstrated a method with higher sensitivity that uses high - power pulsed electromagnetic - waves to detect a radioactive source.

They sent soil samples for DNA testing, looking for matches with particular genes known to be found in microbes and fungi; they tried to stimulate microbial growth on a wide variety of substances and then count the cells produced; and they used highly sensitive radiorespiration activity assays, which involve feeding the soil microorganisms a food source which has been labelled with radioactive carbon, which can then be used to detect if the microorganisms are active.

In their study, published in the May issue of the prestigious journal, Nature Communications, Professor Eunmi Choi of Natural Science and her team demonstrated a method with higher sensitivity that uses high - power pulsed electromagnetic - waves to detect a radioactive source.

By combining RPO results with analyses of radiocarbon (a radioactive isotope of carbon with a half - life of 5,730 years) and stable carbon isotopes, scientists can identify the sources and ages of organic matter in the environment.

The size of the reactor's nuclear core is a fraction of those of large conventional nuclear power plants, with an attendant small radioactive source term.

In contrast, super-Earths with a similar concentration but larger absolute amount of radioactive heat sources (i.e., uranium and thorium) than Earth would produce more internal heat, more vigorous mantle convection, and faster plate tectonic action involving thinner plates, which may promote planetary habitability with lower mountain ranges but higher volcanic activity and an atmosphere with a greater relative composition of volcanic and lighter gases (Sasselov and Valencia, Scientific American, August 2010; Valencia and O'Connell, 2009; and Valencia et al, 2007).

Now surround body «B» with body «A», which is also a thin spherical shell (external radius RE) with internal and external black body radiating surfaces, but contains no internal radioactive energy source.

Place a moon - like solid object (no or infinitesimal amounts of liquids and gases) with a small internal radioactive - decay source of thermal energy in space isolated from all other matter.

Ideally, radioactive decay produces the best source, but not everyone is equipped to hook up such hot stuff, which is why random.org contents itself with static, as it were.

Collaborated with the rig operators to create a safe work procedure for working with MWD radioactive sources and document regular safety audits identifying potential hazardous zones on the rig