Sentences with phrase «alpha particles»

With the range of alpha particles in human tissue nearing 0.1 mm, the method allows selective irradiation, killing the tumour cells with minimal damage to healthy tissue.

These minerals emit alpha particles, which consist of helium nuclei (He2 +), to which electrons readily attach themselves.

(Alpha particles from daughter isotopes will travel to different shells.)

Then, in the early 1990s, scientists noticed that when they blasted cells with alpha particles, mutations cropped up even in cells that had not been directly hit.

Each 238U atom eventually ejects one alpha particle in a random direction, but at the specific velocity corresponding to 4.19 million electron volts (MeV) of energy — the binding energy released when 238U decays.

The peptide is labelled with the alpha - emitting radionuclide 225Actinium that generates four high - energy alpha particles during its decay.

Through the lens, you could view flashes of light resulting from the collision of alpha particles against the screen during ore decay.

A combination of PPPL modeling led by physicist Gerrit Kramer and DIII - D experiments has found that broadening the electric current in the center of plasma could reduce the loss of crucial elements called alpha particles that heat the plasma and sustain fusion reactions.

The TRUs are especially dangerous because they emit the highly carcinogenic alpha particles.

Columbia University's Tom Hei and collaborators dyed hybrid human - hamster cells so they could see the nuclei, then sent a microbeam of alpha particles only to the cell's cytoplasm.

«Thermal neutrons, such as those from nuclear explosions, lead to damage in glass in much the same way that alpha particles pit plastic.

«When we put two Helium - 4 nuclei or alpha particles together using a local interaction for the nucleons, they stuck together, but with non-local interactions they didn't.

Among other projects, CNL is investigating the health impacts of alpha particle exposure, how to harness heat generated from alpha decay to power batteries for space travel, better detection techniques for environmental remediation and decommissioning activities, and manufacturing processes to produce alpha - emitting isotopes for industrial applications.

As Canada's national nuclear laboratory, CNL has an extensive science and technology program that includes alpha particle research.

Control rods are made from elements like Boron and Cadmium which are able to absorb the excess Alpha particles without undergoing fission themselves.

, during this brief instant, a third alpha particle merges with the first two, carbon will be formed.

It was only in 1940 when Corson, Segre, and MacKenzie at the University of California synthesized the new element by bombarding alpha particles against bismuth.

Thermoluminescent dating assessment of alpha particle contribution.

The back end of the nuclear fuel cycle, mostly spent fuel rods, often contains fission products that emit beta and gamma radiation, and may contain actinides that emit alpha particles, such as uranium - 234, neptunium - 237, plutonium - 238 and americium - 241, and even sometimes some neutron emitters such as Cf.

The helium nuclei are called alpha particles, and the heat produced is referred to as alpha heating.

Curium was only discovered in 1944, by Glenn Seaborg and his collaborators at the University of California, Berkeley, who, by bombarding atoms of plutonium with alpha particles (atoms of helium) synthesized a new, very radioactive element.

A substance is said to be radioactive if it contains atoms with unstable nuclei and gives out nuclear radiation in the form of alpha particles, beta particles or gamma rays.

The Alpha Particle X-ray Spectrometer, or ASPX, that irradiates samples of Martian soil to determine the elemental composition of the soil.

Why aren't they cursing Plato, «The Dude», the alpha particle, Buddah or Mohammed.

Uranium emits alpha particles, the nuclei of helium atoms, so all those alpha particles need to do is find some stray electrons buzzing around to become helium atoms.

And even though the half - life of weapons - grade plutonium is 24,000 years, some experts have suggested that alpha particles emitted as the plutonium decays could crack the pits in the bombs that contain it within 15 years.

They saw an isotope of dubnium (atomic number 105) emit an alpha particle — two protons and two neutrons bound together — to produce an isotope of lawrencium (atomic number 103) that's never been seen before.

When radon is in the air close to a material such as the plastic used in eyeglass lenses (allyl - diglycol - carbonate, or CR - 39) it decays, emitting an alpha particle.

For decades, experts thought the alpha particles released by radon didn't affect the cell's cytoplasm.

It can't be used in weapons or reactors, but as the atoms decay, they emit alpha particles, or helium nuclei, that easily convert their energy to heat.

They learn more if instead it emits an alpha particle (two protons and two neutrons) to produce a «daughter nucleus» and then that emits another alpha and so on.

But boron is abundant, and the reaction produces no neutrons, just three alpha particles (helium nuclei)-- hence the company's name.

Deep underground, uranium atoms in rocks undergo radioactive decay, sending off alpha particles — two protons and two neutrons — that can bump into other molecules and change them.

Other evidence supports this: When Onstott measured the concentration of helium, which forms from the alpha particles uranium sends off, he found that there was enough radioactive decay to produce the hydrogen gas in the water.

The radioactive decay of radon gas produces alpha particles (consisting of two protons and two neutrons, an alpha particle is just the bare nucleus of a helium atom), beta particles (which are actually fast - moving electrons), and gamma rays (very energetic photons).

Alpha particles, beta particles, gamma rays, muons, neutrinos: The list is long and puzzling, and most of it has nothing to do with human activities.

Cosmic rays are mostly protons plus a smattering of alpha particles and other atomic nuclei.

The by - products include free neutrons, photons usually in the form gamma rays, and other nuclear fragments such as beta particles and alpha particles.

These particles are the building blocks of the universe, coming together to form nuclei like Helium - 4, or alpha particles, which in turn play a role in the synthesis of carbon and oxygen within stars.

And those alpha particle interactions were dependent upon the strength and locality of the nucleon interactions.

Diagram showing a quantum phase transition from a gas of alpha particles to a nuclear liquid.

The rover's ChemCam blasted Jake with a laser (red dots), while its Alpha Particle X-Ray Spectrometer bombarded the rock with radiation (purple circles).