Flashcards
Particles and radiation
Cards in this deck (58)
- 1What is the real masss of protons and neutrons1.67 x 10^-27
- 2real charge of protons+1.60 x 10 ^-19
- 3real charge of electron-1.60 + 10^-19
- 4real mass of electron9.11 x 10^-31
- 5what is a nucleonsomething that is found in the nucleus
- 6what is specific chargethe charge to mass ratio
- 7how do we calculate specific chargecharge / mass
- 8what are the units for specific charge-1
CKG - 9what does the strong nuclear force doholds the nucleus together
- 10why is it called the STRONG nuclear forcebecause it overcomes the electrostatic force of repulsion
- 11where s the strong nuclear force attractive from0.5 - 4 fm
- 12what is one fm in meters-15
10 - 13what happens in beta decaya neutron turns into an electron and a proton
- 14what do we use for positron emmiting tomographythe meeting of matter and antimatter
- 15what is the antiparticle of an electronpositron
- 16how does PET workA PET scanner emits positrons into the Brian, they meet with an electron and they annihilate each other. Two gamma photons are produced as a result and the sensor picks up on it and gradually builds an image
- 17when does positron mission take placewhen a proton turns into a neutron in an unstable nucleus with too many protons
- 18what did Dirac's theory of antiparticles suggestfor every particle there is a corresponding anti particle that :
annihilates the particle and its self if they meet
has exactly the same rest mass
has the exact opposite charge - 19if it has enough sufficient energy, what can change into a particle-antiparticle pair when passing a nukes or an electrona photon
- 20what are cosmic rayshigh-energy particles that travel through space from stars
- 21what do cosmic rays makeshort-lived particles and anti particles
- 22what was in most cosmic raysfast moving protons or small nuclei
- 23how are particles and antiparticles createdwhen cosmic rays colide with gas atoms in the atmosphere
- 24how were particles and antiparticles discoveredusing cloud chambers and other detectors
- 25—muon
- 26what charge do muons havenegatively
- 27how big is the rest mass200 times the rest mass of an electron
- 28—pion
- 29what charge does the pion havepositive, negative or neutral
- 30mass of a pionbigger than a muon but smaller than a proton
- 31—kaon
k meson - 32what is the charge of a k mesonall 3 charges,
positive, negative, neutral - 33who discovers mesons ( who also predicted them )Cecil powell
Hideki Yukawa - 34who discovered muons and howcarl Anderson via cloud chambers, it had a track length of 40mm indicating It lasts a lot longer than strong interacting particle should.
- 35how are kaons madewhen protons moving at high speeds crash into nuclei, they travel far beyond the nucleus they originally decayed from
- 36how do kaons decayvia the weak interaction
- 37what does the reason of kaon decay cause it to bea strange particle
- 38what can a kaon decay intopions
a muon and an antinuetrino
An antimony and a neutrino - 39what can a charged pion decay intoa meuon and an antineutrino
antimeuon and a neutrino - 40what can a neutral pion decay intohigh energy photons
- 41how are new particles and antiparticles createdhigh-energy interaction
- 42how do hadrons interactvia strong interaction
- 43do leptons interact through the strong interactionno
- 44what interactions do leptons interact throughweak, gravitational and through the electromagnetic interaction ( if charged )
- 45what interactions can hadrons act throughall four fundamental interactions
- 46what does the large hadron collider doboosts the kinetic energy of charged particles
- 471 GeV =1000 MeV
- 48when kaons are created, what else is producedhadrons created through the strong interaction
- 49what are baryonsprotons and all other hadrons either directly or indirectly decay into protons
- 50what are mesonshadrons that do not decay into protons.
kayons and barions are not baryons - 51what is the equation for electromagnetic frequency of frequency in a vacuum
- 52when are electromagnetic waves emitted- a fast moving electron stops, slows down or changes direction
- an electron in a shell of an atom moves to a different shell of lower energy - 53what is a photona packet of electromagnetic waves
- 54Photon energy equationE=hf
- 55what is the value of the Planck constant
- 56how do we find the power of a beam with equally frequent photonspower of beam = nhf
- 57how are positron emmiting isotopes createda stable isotope is placed in the path of a beam of protons
- 58—
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- Phyiscs Flashcards on Particles and radiation, created by Madelaine-anne Baines on 15/09/2018.
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- Madelaine-anne Baines
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