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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. For example:
which can also be written as:
since an alpha particle is the same as a helium-4 nucleus, which has mass number 4 and atomic number 2. It also has a charge +2, but the charge is usually not written in nuclear equations, which describe nuclear reactions without considering the electrons. This convention is not meant to imply that the nuclei necessarily occur in neutral atoms.
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).
This page contains text from Wikipedia, the Free Encyclopedia -
http://en.wikipedia.org/wiki/Alpha_decay
This article is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License, which means that you can copy and modify it as long as the entire work (including additions) remains under this license.
This article is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License, which means that you can copy and modify it as long as the entire work (including additions) remains under this license.
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- Alpha decay
- Alpha emitter
- Alpha particle
- Alpha particles
- Alpha process
- Americium-241
- Angstrom
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- Beta decay
- Binding energy
- Cancer
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- Cluster decay
- CNO cycle
- Decay product
- Double beta decay
- Earth
- Electric charge
- Electric current
- Electron capture
- Enrico Fermi
- Equivalent dose
- Ernest Rutherford
- Gamma ray
- Geiger–Nuttall law
- George Gamow
- Half-life
- Hans Bethe
- Heavy metals
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- Helium-4
- Henri Becquerel
- Homi J. Bhabha
- Internal conversion
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- Ishfaq Ahmad
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- MeV
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Physics - Nuclear Physics (13 of 22) Alpha Decay
Physics - Nuclear Physics (13 of 22) Alpha Decay
Visit http://ilectureonline.com for more math and science lectures! In this video I will show you how to calculate the energy released in an alpha decay.- published: 02 Jun 2013
- views: 39
- author: Michel van Biezen
14:02
NUCLEAR CHEMISTRY - Radioactivity & Radiation - Alpha, Beta, Gamma
NUCLEAR CHEMISTRY Radioactivity & Radiation - Alpha, Beta, Gamma - This video introduces s...
published: 16 Oct 2012
author: sciencepost
NUCLEAR CHEMISTRY - Radioactivity & Radiation - Alpha, Beta, Gamma
NUCLEAR CHEMISTRY - Radioactivity & Radiation - Alpha, Beta, Gamma
NUCLEAR CHEMISTRY Radioactivity & Radiation - Alpha, Beta, Gamma - This video introduces students to nuclear chemistry. Discussed are the topics of why a nuc...- published: 16 Oct 2012
- views: 41835
- author: sciencepost
5:22
What is alpha and beta decay
This video is a very simple explanation of alpha and beta decay (or emission)....
published: 25 Nov 2012
author: meagherscience
What is alpha and beta decay
What is alpha and beta decay
This video is a very simple explanation of alpha and beta decay (or emission).- published: 25 Nov 2012
- views: 1786
- author: meagherscience
3:17
Types of Radiation | Physics | the virtual school
Learn about the different types of radiation in this physics video from the virtual school...
published: 08 Dec 2012
Types of Radiation | Physics | the virtual school
Types of Radiation | Physics | the virtual school
Learn about the different types of radiation in this physics video from the virtual school. Alpha particles, beta particles and gamma rays... what are they a...- published: 08 Dec 2012
- views: 34900
- author: The Fuse School - Global Education
photo: GNU / photographed by Mia & Lana's dad for www.sarahgeronimo.com
29 May 2015
As of this morning, May 29 (Manila Time) or this evening, May 28 (California, United States Time) actor/athlete Matteo Guidicelli is in Bohol. His latest Instagram post confirmed that he will stay there for three days for an event he called Giro D Luca ... An indie film for Matteo and a mainstream movie for Sarah Geronimo ... ....
photo: AP / Mehmet Shakir
28 May 2015
Isis rounded up civilians trapped in Palmyra and forced them to watch 20 people be executed in the historic city’s ancient amphitheatre, a Syrian monitoring group has claimed. The Britain-based Syrian Observatory for Human Rights said the men were accused of having fought for President Bashar Assad's army. It is not known how they were killed ... pic.twitter.com/7tgv1ajjjI ; frederic Helbert (@FredericHelbert) May 27, 2015 ... --> ... Sport ... News ... ....
photo: White House / Pete Souza
27 May 2015
Article by WN.com Correspondent Dallas Darling. Not only are nuclear weapons the most terrifying weapon ever created by humankind, but they are the most indiscriminate and genocidal ... In other words, the Jews of modern-day Israel will never be like the Jews in the Holocaust. Israel will always be able to visit a terrible retribution on those who threaten them and their expansionist goals.(1) ... Additionally, the U.S ... regimes ... Bomb Scare ... 53....
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noodls
10 Dec 2014
The JUROGAM Ge array and the GREAT spectrometer, in conjunction with the RITU gas-filled separator, were used for prompt-gamma-ray and decay spectroscopy, respectively ... Based on unhindered alpha decays of 173Pt and 175Pt, and the observation of subsequent M1 transitions in 169Os and 171Os, respectively, the ground-states of 173,175Pt were assigned to have Ip = (7/2-)....
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The Times of India
04 May 2014
The measured decay properties by an international collaboration working at the GSI accelerator laboratory in Germany match previous data, strengthening the case for official recognition of 117 as a new element ... These measured chains of alpha-decays produced isotopes of lighter elements with atomic numbers 115 to 103, whose registration added to the proof for the observation of element 117....
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The Siasat Daily
03 May 2014
These measured chains of alpha-decays produced isotopes of lighter elements with atomic numbers 115 to 103, whose registration added to the proof for the observation of element 117. In the decay chains, both a previously unknown alpha-decay pathway in Db-270 (dubnium - element 105) and the new isotope Lr-266 (lawrencium - element 103) were identified....
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The Guardian
06 Dec 2013
What do plankium, poliakoffium and Sweden share in common?. Artist's idea of the fusion reaction of calcium-48 nuclei with an americium-243 target. Image. United States Department of Energy (Public domain) ... Roughly 50 atoms of ununpentium have been synthesised since 2003 ... The isotope with the longest half-life is Uup-289, which alpha decays out of existence after just 200 milliseconds or so ... [Video link] ... .. .. .. .. .. .. .. .. .. .. .. ... Flerovium ... ....
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The Guardian
22 Nov 2013
So far, six isotopes of ununtrium have been reported and they all decay into smaller elements by releasing a high-energy helium nucleus (alpha decay) ... This collaborative team synthesised ununpentium by bombarding americium-243 with calcium-48 nuclei, the products of which then alpha-decayed within 100 milliseconds, giving rise to element 113....
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The Guardian
15 Nov 2013
What do ununbium, Copernicus and China share in common?. This week's element is copernicium, which has the atomic symbol, Cn and the atomic number, 112 ... Originally, it was proposed this element should have the symbol Cp ... Being the shy element that it is, it disappeared almost immediately by releasing a high-energy helium nuclei (alpha decay) ... Most of these undergo alpha decay, although some decay through spontaneous fission ... [Video link]....
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National Public Radio
10 Nov 2013
As it stabilizes, the polonium emits alpha particles. "Alpha radiation is not highly penetrating radiation," Blum says ... these elements that are in that radium decay chain as polonium is the structure is a little bit like calcium," Blum says ... As the polonium-210 underwent alpha decay, it was a race against the clock to solve Litvinenko's murder....
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The Guardian
10 Nov 2013
Heisenberg's idea can also explain a type of nuclear radiation called alpha decay. Alpha particles are two protons and two neutrons emitted by some heavy nuclei, such as uranium-238 ... But, because an alpha particle inside a nucleus has a very well-defined velocity, its position is not so well-defined ... alpha particle escapes and we see radioactivity....
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The Guardian
01 Nov 2013
What do ununnilium, wixhausium and politzium share in common? ... Darmstadtium is highly unstable and radioactive ... This element decays by releasing a high-energy helium nucleus (alpha decay), although some isotopes will sometimes decay by giving rise to smaller elements (spontaneous fission) ... This lone atom winked out of existence 260 microseconds later by emitting an alpha particle, which transformed it into hassium-265 ... [Video link]. .. ... ....
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The Guardian
25 Oct 2013
This element wasn't even named until roughly 200 trillion half-lives had passed after the birth and death of the original atom. Image. Joe Wolf/Creative Commons Attribution-NoDerivs 2.0 Generic license ... Meitnerium is very unstable and highly radioactive ... The atoms mostly decay by releasing a high-energy helium nucleus (alpha decay), although some may disintegrate via spontaneous fission to give rise to smaller elements ... [Video link]. .. ... ....
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The Guardian
18 Oct 2013
Nearly all of these isotopes decay by releasing alpha ... Cherdyntsev proposed that eka-osmium (element 108) spontaneously alpha decays (releases a high-energy helium nucleus) to give rise to plutonium-239 -- and, he said, that decay is the source for the particular sort of radiation damage he observed as well as the excess plutonium that he measured....
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The Guardian
06 Sep 2013
Image ... Much later, in 1992, the International Union of Pure and Applied Chemistry (IUPAC) re-assessed the claims of discovery for this element and concluded that only the Dubna team correctly detected and assigned decays to nuclei of element 102 in 1966 ... This isotope decays into fermium-255 via alpha decay (release of a helium-4 nucleus), or into mendelevium-259 through electron capture or through spontaneous fission ... [Video link]. .. .....
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Deccan Chronicle
28 Aug 2013
London. Remember the periodic table from chemistry class in school? It may soon have a new member! ... The results confirm earlier measurements performed by research groups in Russia ... By bombarding a thin film of americium with calcium ions, the research team was able to measure photons in connection with the new element's alpha decay ... ....
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- Lyrics: play full screen play karaoke
- Alivio - Ataque 77
- Alpha Dog - Fall Out Boy
En la penumbra, el patio aúlla
extraños ruidos
soplan las cosas,
si no supiera que el viento
es lo que mueve todo
terminaría muriendo de terror.
Nubes de de angustia
cubren mi cielo
lluvias oscuras de pensamientos,
cuando no quedan salidas
cuando no hay nuevas entradas
cualquier recurso que alivie el dolor
antes de la tormenta.
Clap until you hands hurt
Standing ovations, or boo-boo-boos
W-watch until we blur
Walk off into the sunset
Tell rock 'n roll I'm alone again
I want to put the mid-west home again
Your time has passed, they say never means never
So the fast dance won't last but never means forever
Never means forever
Alpha dog and o-o-omegalomaniac-ac-ac
Alpha dog and o-o-mega-megalo
Welcome to the new déjàvu
I can almost see the wizard through the curtains
Alpha dog and o-o-omegalomaniac-ac-ac
We must have the best coach
Tell the best jokes
We must make it hard to look so easy
Doing something so hard
You must see my way
They scream when they look at me
I'mma, I'mma star
I'mma, I'mma star
I'mma star
Oh, I'mma star
Alpha dog and o-o-omegalomaniac-ac-ac
Alpha dog and o-o-mega-megalo
Welcome to the new déjàvu
I can almost see the wizard through the curtains
Alpha dog and o-o-omegalomaniac-ac-ac
You're not the first or the last
But you're possible the prettiest, whoa
He's a fighter past his prime
He's in the gutter waving his hand
I'm just fine
You're not the first or the last
But you're possible the prettiest, whoa
He's a fighter past his prime
He's in the gutter waving his hand
Alpha dog and o-o-omegalomaniac-ac-ac
Alpha dog and o-o-mega-megalo
Welcome to the new déjàvu
I can almost see the wizard through the curtains
