Alpha decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle ( two protons and two neutrons ) and thereby transforms ( or ' decays ') into an atom with a mass number 4 less and atomic number 2 less.

Alpha decay is by far the most common form of cluster decay where the parent atom ejects a defined daughter collection of nucleons, leaving another defined product behind ( in nuclear fission, a number of different pairs of daughters of approximately equal size are formed ).

Alpha decay is the most likely cluster decay because of the combined extremely high binding energy and relatively small mass of the helium-4 product nucleus ( the alpha particle ).

Alpha decay, like other cluster decays, is fundamentally a quantum tunneling process.

Alpha decay typically occurs in the heaviest nuclides.

Alpha decay can provide a safe power source for radioisotope thermoelectric generators used for space probes and artificial heart pacemakers.

Alpha decay is much more easily shielded against than other forms of radioactive decay.

# REDIRECT Alpha decay

Alpha decay is when a nucleus releases an alpha particle, which is two protons and two neutrons, equivalent to a helium nucleus.

Alpha decay is one example type of radioactivity | radioactive decay, in which an atomic nucleus emits an alpha particle, and thereby transforms ( or ' decays ') into an atom with a mass number 4 less and atomic number 2 less.

Alpha particles, protons, and X-rays are emitted during the radioactive decay of unstable atoms.

Alpha particles, produced by the decay of radon and polonium, leave tracks of charge on the silicon wafers when they impact the silicon.

* One recent hypothesis suggests that the lights are formed by a cluster of macroscopic Coulomb crystals in a plasma produced by the ionization of air and dust by Alpha particles during radon decay in the dusty atmosphere.

Alpha decay of heavy elements in the Earth's crust is the source of most naturally occurring helium-4 on Earth.

# REDIRECT Alpha decay

He distinguished three forms of subjective stroboscopy which he called alpha, beta, and gamma: Alpha stroboscopy occurs at 8 – 12 cycles per second ; the wheel appears to become stationary, although " some sectors look as though they are performing a hurdle race over the standing ones " ( p. 48 ).

Alpha wave intrusion occurs when alpha waves appear with non-REM sleep when delta activity is expected.

Alpha radiation is dangerous when alpha-emitting radioisotopes are ingested ( breathed or swallowed ).

The group becomes an incorporated national collegiate sorority on December 30, 1929, when a charter is granted to the Alpha Chapter at Butler University in Indianapolis, Indiana.

The Dominion gained a foothold in the Alpha Quadrant when Gul Dukat announced that the Cardassian Union was joining the Dominion in 2373.

Willie the Wildcat made his debut in 1933 first as a logo, and then in three dimensions in 1947, when members of the Alpha Delta fraternity dressed as wildcats during a Homecoming Parade.

These reports are justified in " Sanctuary ", when a large fleet of Skrreea ships appears in the Alpha Quadrant, in search of a new homeworld in light of the conquest of their original planet by Dominion forces.

Gowron appears prominently in Star Trek: Deep Space Nine in the episode " The Way of the Warrior ", when he launches an assault upon the Cardassian Union, claiming that the newly installed civilian Detapa Council is infested with shapeshifters from the Dominion, a powerful organization from the Gamma Quadrant that is attempting to gain a foothold in the Alpha Quadrant.

Motherwell FC were born on 27 May 1886, when representatives of the two main Motherwell works teams, Glencairn and Alpha FC met in Ballie's pub in Parkneuk, and decided to merge the two teams, with the aim of creating a club to represent the town as a whole at a higher footballing level.

Louis and Hardin separated in 1931, when he had begun a liaison with Alpha Smith, who threatened to sue Armstrong for breach of promise, so he begged Hardin not to grant him a divorce.

Highlights from this period include Mad Crash ( 1984 ), Alpha Mission ( 1985 ), and Athena ( 1986 ), a game that gained a large following when it was ported to the NES in 1987.

In 1961 Skelton was made an honorary brother of the Phi Alpha Tau Fraternity of Emerson College when he was awarded the Joseph E. Connor Award for excellence in the field of communications.

The Alpha Betas are enraged, a fact made worse when Betty dumps Stan for Lewis ( because he is much better in bed ).

Vindicator ( still under of Master of the World's mental control ) helped Alpha Flight against Master of the World when he attempts to kill Claire.

Alpha Flight later comes to the aid of Red Hulk when the Mayan Gods appear on Earth.

* Alpha Flight's name can be seen in X2: X-Men United on the computer when Mystique hacks into Stryker's computer.

After graduating, as a fresh Lieutenant Saavik was on her cadet cruise on the USS Enterprise with Admiral James T. Kirk and Captain Spock when Kirk's old enemy Khan Noonien Singh sought revenge for the failure of the Ceti Alpha V colony and the death of his wife, Marla McGivers-Singh, and attacked the Enterprise.

Among these local fraternities was Phi Nu fraternity at McGill University in Montreal, Quebec, Canada when Phi Nu was chartered as the Alpha Omicron chapter, Delta Sigma Phi became an international fraternity.

The Alpha Hardware Abstraction Layer ( HAL ) generates this error when it encounters a hardware failure.

Only four occasions saw Zack ready to give it up: when the Green Ranger took out Zordon, Alpha 5 and the Command Center while removing the Rangers from the Megazord ; when his team was placed under a spell to take away their confidence ; and when their Dinozords were commandeered by Lord Zedd's first monster, Pirantishead.

However, when Lord Zedd unleashes his maniacal Nimrod monster, which in turn spawns other monsters AC and DC, Alpha and Zordon decide it is time to take matters into their own hands.

The Fraternity was again incorporated as a national organization on January 9, 1953, when the Secretary of State of New York accepted the incorporation of Phi Iota Alpha Fraternity.

Sometime around the year 2374, the USS Voyager encounter the Hirogen when the crew uses an apparently abandoned ancient communications network to send a message to the Alpha Quadrant.

Alpha particles are the same as a helium-4 nucleus ( two protons and two neutrons ) and travel at speeds in excess of 5 % of the speed of light, but they interact with matter very heavily, and thus at their usual velocities only penetrate a few centimeters of air, or a few millimeters of low density material ( such as the thin mica material which is specially placed in some Geiger counter tubes to allow alpha particles in ).

Alpha process elements ( or alpha elements ) are so-called since their most abundant isotopes are integer multiples of the mass of the helium nucleus ( the alpha particle ).

The term can also refer to the organization of protons and neutrons within an atomic nucleus, e. g. the Alpha particle ( a. k. a. as " α-cluster "), consisting of two protons and two neutrons ( as in a helium nucleus ).

Alpha can be stopped quite easily by a few centimetres in air or a piece of paper and is equivalent to a helium nucleus.