O QUE SIGNIFICA ALPHA PARTICLE EM INGLÊS
Partícula alfa
As partículas alfa consistem em dois prótons e dois nêutrons ligados em uma partícula idêntica ao núcleo de um hélio. Eles geralmente são produzidos no processo de decaimento alfa, mas também podem ser produzidos de outras maneiras. As partículas alfa são nomeadas após a primeira letra no alfabeto grego, a. O símbolo para a partícula alfa é α ou α2 +. Como eles são idênticos aos núcleos de hélio, eles também são às vezes escritos como He2 + ou 4 2He2 + indicando um íon de Helio com uma carga de +2. Se o íon ganhar elétrons de seu ambiente, a partícula alfa pode ser escrita como um átomo normal de Helium 4 2He. A nomenclatura não está bem definida e, portanto, nem todos os núcleos de hélio de alta velocidade são considerados por todos os autores como partículas alfa. Tal como acontece com os raios / partículas beta e gama, o nome usado para a partícula traz algumas conotações suaves sobre seu processo de produção e energia, mas não são rigorosamente aplicadas. Alguns autores científicos podem usar núcleos de hélio duplamente ionizados e partículas alfa como termos intercambiáveis. Assim, as partículas alfa podem ser usadas vagamente como um termo ao se referir a reações estelares de núcleos de hélio, e mesmo quando ocorrem como componentes de raios cósmicos.
definição de alpha particle no dicionário inglês
A definição de partícula alfa no dicionário é um núcleo de hélio-4, contendo dois nêutrons e dois prótons, emitidos durante algumas transformações radioativas.
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10 LIVROS EM INGLÊS RELACIONADOS COM «ALPHA PARTICLE»
Descubra o uso de
alpha particle na seguinte seleção bibliográfica. Livros relacionados com
alpha particle e pequenos extratos deles para contextualizar o seu uso na literatura.
1
Matter and Interactions
P.32 An alpha particle (a helium nucleus, containing 2 protons and 2 neutrons)
starts out with kinetic energy of 10 MeV (10 × 106 eV), and heads in the +x
direction straight toward a gold nucleus (containing 79 protons and 118 neutrons
).
Ruth W. Chabay, Bruce A. Sherwood,
2011
2
Radioactivity: Introduction and History: Introduction and ...
The nuclei of daughter atoms of alpha-particle-emitting nuclides are often
unstable themselves and may also decay by further alpha-particle emission.
Thus, alpha-particle-emitting nuclides may consist of a mixture of radionuclides,
all part of a ...
Michael F. L'Annunziata,
2007
3
Magnet power supply for
alpha-
particle spectrometer II
A current regulated power supply has been built to deliver current, continuously variable from 0 to 600 ma, into a load of 4000 ohms. The system is stable to approximately 1 part in 10,000 over long periods of time.
George F. Schrader, University of California, Berkeley. Radiation Laboratory,
1956
4
Nuclear Engineering Handbook
Alpha particle Ra-226 Daughter nucleus Np-237 Th-234 Ra-228 Rn-222 4 2 α ++
(Helium nucleus) (4.00147 amu) Parent nucleus Am-241 U-238 Th-232 FiGuRe
19.1 Alpha decay. An alpha particle can also be thought of as a fully ionized ...
According to the principles of the conservation of energy and the conservation of
momentum, this energy is shared between the alpha particle and the recoiling
daughter nucleus — particles that have equal and opposite momenta. The
emitted ...
6
General, Organic, and Biological Chemistry
11.34 Platinum-192 decays to osmium-188 through alpha particle emission.
Based on the following diagram, in which yellow spheres represent platinum-192
nuclides and red spheres represent osmium-188 nuclides, how many halflives
have ...
7
BiCMOS Technology and Applications
When an alpha particle strikes silicon, it travels and loses energy along a straight
path. The length of travel depends on the energy of the alpha particle. The
energy lost by the incident particle goes to create high energy electron-hole (e-h)
...
8
Immunoproteins—Advances in Research and Application: 2013 ...
“The detrimental radiolytic effects described above have greatly complicated the
synthesis of .alpha.-particle emitter labeled pharmaceuticals having
therapeutically effective levels of radioactivity. This is especially true in cases
where it is ...
9
The
Particle Odyssey : A Journey to the Heart of the Matter: ...
This makes an exceptionally stable configuration; in fact, it is the nucleus of
helium – the alpha particle. The stability of alpha particles accounts for their
appearance in radioactive decays, particularly of heavy elements such as
uranium and ...
Frank Close, Michael Marten, Christine Sutton,
2002
10
Field Studies of Radon in Rocks, Soils, and Water
The gross alpha-particle activity generally indicates the total amount of uranium
and 226Ra present in the sample; this was true of ground waters in the Newark
basin. The combined activities of uranium and 226Ra equaled, or nearly equaled
, ...
10 NOTÍCIAS NAS QUAIS SE INCLUI O TERMO «ALPHA PARTICLE»
Conheça de que se fala nos meios de comunicação nacionais e internacionais e como se utiliza o termo
alpha particle no contexto das seguintes notícias.
Getting the measure of Mars
Sam and Curiosity's alpha particle x-ray spectrometer have found each key element for life – carbon, hydrogen, oxygen, phosphorus and ... «Royal Society of Chemistry, jul 15»
Mars Exploration Rovers Update: Opportunity Phones Home after …
During solar conjunction, the rover spent most of June using her Alpha Particle X-ray Spectrometer (APXS) gleaning the chemical composition ... «The Planetary Society, jul 15»
Macomb County student studies nuclear physics at Notre Dame …
... predicting the thickness of foil by its ability to slow alpha particle radiation; and measuring the alloy content of metal using x-ray fluorescence. «The Macomb Daily, jul 15»
Another city opts to treat water for radionuclides
Which breaks down to 15 pCi/L gross alpha particle and 5 pCi/L combined radium on readings. McCleish said that Bonne Terre isn't the only ... «Daily Journal Online, jun 15»
Actinium Pharmaceuticals Inc (NYSEMKT:ATNM) Enhances Its …
Actinium Pharmaceuticals Inc (NYSEMKT:ATNM)'s Actimab-A is the most advanced alpha particle immunotherapy currently available. «FinancialsTrend, jun 15»
U3O8 Corp. discovers large radiometric anomaly that reaffirms …
The radon cup survey identified an area of approximately 90km2 in which the alpha particle concentration is >250 tracks per square millimetre, ... «Stockhouse, jun 15»
Mars Exploration Rovers Update: Opportunity Tours Spirit of St …
The next sol, the robot field geologist aimed her Alpha Particle X-ray Spectrometer (APXS) to measure atmospheric argon, part of a ... «The Planetary Society, jun 15»
Uncover the Universe's Mysteries From the Comfort of Home
You're seeing radon, a naturally radioactive element, heave out an alpha particle—two neutrons plus two protons. That's pretty cool, but radon ... «Wired, mai 15»
Mars Exploration Rovers Update: Opportunity Logs Sol 4000, Digs …
... of different chosen targets on the outcrops called in the Thessaloniki and Thermopylae with her Alpha Particle X-ray Spectrometer (APXS). «The Planetary Society, mai 15»
Actinium Doses the First Patient in the Fourth, Final Cohort of Its …
Actimab-A, Actinium's most advanced alpha particle immunotherapy program is continuing its clinical development in a Phase 1/2 trial for newly ... «Marketwired, abr 15»