Protons Definition and 337 Threads

A meson can be produced by a high energy photon scattering off a nucleon in an interaction such as $$\gamma + p \rightarrow p + \pi^0$$ As long as the photon is sufficiently energetic, mesons heavier than the pion can be produced, as well as multiple mesons such as ##\pi^{+} + \pi^{-}##...

heisenbergs uncertainity says that we can never predict the position and velocity of a particle exactly simultaneously. that is we can never be sure where an electron or a proton would be seconds from now. its all about probablity. then how can these particles together form something like we...

Homework Statement Homework Equations Between Radio Waves and Protons is where my confusion lies; Online I read that Radio waves are non ionizing but if that's the answer then how are protons ionizing? I mean it's no even included in the types of ionizing radiation here...

Can high energy incoming protons and electrons be absorbed and their energies remitted by photons? If so what are the typical ranges of energies emitted and are they heading in the same direction as the original emission if we had a sheet of metal being bombarded by those protons and electrons?

When protons, due to their electric charge, interact with photons are the quarks somehow also involved in this same electric interaction? After all, the quarks do have fractional electric charges. Thanks in advance.

Hi there, I have a problem to solve in Cosmology which says: "Write the formulas for the quantum kinetic energy of neutrons, protons and electrons as well as the formula for the gravitational energy for a neutron star that is comprised of free neutrons, protons and electrons in a ratio of Nn ...

Is it right to say that 'modern physics has no deep explanation of the nature of charge' in electrons and protons?

Hi, Does an Atom's Type have to do with the number of protons and neutrons it has? Or are they completely unrelated? Just curious. Thanks :)

Homework Statement The figure below shows five protons that are launched in a uniform electric field E (green). The magnitude and direction of the launch velocities are indicated. Rank the protons according to the magnitude of their accelerations due to the field, greatest first. Justify...

Homework Statement There protons are and two positrons are held such that two protons are on the ends of a diagonal of a square and the two positrons are on the ends of the second diagonal. The third proton is situated at the centre of the square. The system is released from rest. Find the...

Mentor note: Thread got moved to the homework section How close can two protons get if one is at rest and the other has a kinetic energy equal to the average energy at T =107 K? I know that the kinetic energy of the moving proton is 3/2kT, but what is the kinetic energy of the proton at rest...

Could the orbit filling order of electrons be more classical and less quantum? I attached a jpeg and need someone to do a electrostatics analysis of the CAD model version of it. Does anyone have an electrostatics software package and have time to do a finite element analysis on a 3-D part to...

A quote from wikipedia: "At sufficiently low temperatures, free protons will bind to electrons. However, the character of such bound protons does not change, and they remain protons. A fast proton moving through matter will slow by interactions with electrons and nuclei, until it is captured by...

Well I'm in grade 11 and for an investigation I decided I'd observe the behavior of protons once the neutrons and electrons are removed from the atom. Specifically I want to observe how the acceleration at which the protons move apart from each other varies with the mass of the atom (i.e. #...

When my eighth grade daughter was studying physics in her class, I watched a movie with her on the Hadron Collider (" Particle Fever "). We discussed atoms, electrons, protons, neutrons; we discussed orbits and statistics, and then down into the standard model and fermions, leptons, yadda...

So I was thinking, if the body has its own electrical currents... especially in the brain, then the brain must have an electrical field that extends infinitely. If that is the case can the brains electrical field interact with the real world and influence it. So for example if the field was...

hi, I've heard that protons has most of their mass from their electromagnetic and strong interactions between their quarks, but specifically, how does that make mass? and if so, what is intrinsic mass then? and pions has 2 quarks and strong and electro interactions, why doesn't it has mass...

I am thinking of a time period between two events: 1. After the annihilation of most protons/neutrons with all anti-protons/anti-neutrons, and 2. Before the annihilation of electrons and positrons. During this period the temperature decreases from T1 to T2. T1 is the highest temperature at...

Homework Statement [/B] You find a 1kg piece of rock containing 3 elements: Fakium with 50 protons and 52 neutrons imaginium with 52 protons and 48 neutrons madeupium with 51 protons and 51 neutrons Fakium is known to be radio active, Which of the other two elements could be the decay product...

How are protons in an ion source distributed in momentum space? Consider an ion source fed with H2 at low pressure. As soon as the protons are free protons they are accelerated by the extraction voltage of perhaps 10 kV. In momentum space the protons are initially a "shell" with a certain...

I have heard of the tetraneutron, but is it real? Could it have electrons? If so, how unstable would it be? Could fermions not typically in an atom balance this instability?

I googled this and didn't find anything. But it's a simple question. If a proton was moving 99.999% the speed of light in the LHC, and the Earth and LHC and everything around it disappeared, would the proton lose speed or energy overtime? assuming no background radiation etc. A simpler way of...

I was wondering if protons exchange strong nuclear interaction/force with other protons or do protons exchange strong nuclear interaction/force with just neutrons OR do all protons and neutrons exchange strong nuclear interaction/force with all protons and neutrons. Protons exchanging strong...

How do protons oscillate? Do they move back and forth with a constant velocity, or sort of like a mass on a spring? If so, what is the frequency of oscillation? Thanks

Thanks for reading this As protons go faster and fast in the LHC they have a greater angular momentum (that's not at all the right term) to go around in circles faster and faster as they reach near the speed of light that greater inward attraction towards the magnet to rotate around in the LHC...

Protons and Neutrons vibrate in place, but do they change positions within the nucleus? Let's say that there's a helium atom which has two protons and two neutrons. If the particles were set up on the corners of a square for easy representation with a neutron on the top left and top right, and a...

When an atom vibrates more than usual, say for example effected by a sound wave, do it's protons repel each other further apart than normal? Thus more charged virtual Pions occurring and decaying (discombobulating) into virtual W+ bosons? Edit: I know that accelerated charged particles create a...

On the wiki-pages it says that in the LHC protons travel 3m/s slower than c. I was curious what it would be for heavy-ions; is it maybe 15m/s because their energy is ~5 x lower (7 vs. 2.76 Tev) ? And a small question on the side, does Gravitation assistance have a bigger impact on speeding up...

Please be esy on me for asking what seems a very silly question but i have only just started reading about this sort of thing very recently. I can only learn by asking so please bear with me. thanks My question is, how do we know when we have found a new particle, for example when physicists...

mfb submitted a new PF Insights post LHC Part 3: Protons as Large as a Barn Continue reading the Original PF Insights Post.

Okay so I have a problem with what my textbook is saying. It defined pair production as a process in which a photon of electromagnetic energy is converted to a pair of particles. But then it gave the discovery of an antiproton. Which was when a proton was accelerated to 6MeV and collided into...

1. A Magnetic field line has a length of 70,000 [Km], for this example all particles have an energy of 1.6E-27 [J]. Assuming all motion is parallel to the magnetic field line how long would it take to complete this cycle.2. M[Proton] = 1.677E-27 [Kg] , M[Electron] = 9.1E-31 [Kg] , E[kinetic] =...

I'm a little out of touch with this stuff , but I'm really not getting it.. So my book is considering: in a nucleus of ##z## protons, consider one proton in spherical charge distribution to other protons. So ## \rho = (z-1)e/(4/3) \pi R^{3}##, where ##R## is the radius of the nucleus, is the...

...number? If you are give say Lead, 208Pb. What is the 208? and is it possible to deduce the number of protons Z from it with no other information? Haven't done chemistry yearts so any help would be appreciated.

this is theoretical (and possibly stupid) question; accelerating protons would create an EM wave equivalent to an EM wave generated by electrons at same frequency but the amplitude would be opposite, is that possible. has anyone made a communication circuit from accelerating protons? are...

I have seen in many places, for example here, the statement that the proton consists of valence quarks and sea quarks. I am somewhat confused as to where this picture comes from. The sea quarks are virtual quark-antiquark pairs. I have encountered virtual particles only in the context of...

I know that current flows in the opposite direction of electrons but I'm confused as to whether it is the movement of holes like in a semiconductor or if there are actual positive particles flowing that way.

Hey, I've been trying to figure out why a protons in identical environments will not undergo spin-spin splitting with one another. From what I understand splitting of a signal for a proton is due to the nucleus of another nearby either opposing the external magnetic field or acting in the same...

I am trying to figure out the difference between Δ0 and Δ- and the proton and neutron since both appear to have the same combinations of up/down quarks. Deltas have isospin 3/2 and spin angular momentum 3/2 whereas protons and neutrons have isospin 1/2 and spin angular momentum 1/2. I'm...

I know this question sounds... find a word for it you like... But please bear with me. A proton. An electron. Not very high speeds...Vacuum.. A proton has an electric field, so does an electron... They arrive into each others' fields and start to accelerate towards each other... What...

why do electrons revolve around the nucleus?

Hi, I wanted to ionize hydrogen and helium to get protons and alpha particles. I then want to smash the protons into the alpha particles. Is it better to accelerate both the alpha particle and the proton or just keep the alpha particle as a target for the proton to hit? Or is there a better way...

Why is it that one atom such as hydrogen has one proton while others have many. What is the mechanism driving this force which causes some atoms to be marked for one protons and others for many? And once they are say marked as hydrogen they can be nothing else, correct? Since hydrogen is the...

I was wondering if protons and electrons have different description in the terms of quarks if they're in Dark Matter??

Why are electrons generally further out than protons in the Van Allen Belt?

Andre Geim & Co have discovered that graphene can act as a sieve which allows protons to pass through it, while blocking other atoms and molecules: http://www.independent.co.uk/news/science/scientists-predict-green-energy-revolution-after-incredible-new-graphene-discoveries-9885425.html...

Homework Statement A proton beam of energy E=7mpc2 is incident on a cylindrical volume (V=20 cm3) of liquid hydrogen (density ρ=0.071 g cm-3) at rest. The spot area of the beam is A=4 cm2 and the total cross section is σ=30 mb. What fraction of the protons entering the target will interact...

Hi my question is simple, can we make the protons stay in a fixed position (not accelerating them) in LHC by using the powerful magnets there? Thanks

How can I find the number of protons and neutrons of any element without looking the periodic table. And I need them each so mass spectrometer won't work Edit: I noticed that my title is wrong, explanation of the number of electrons are not needed

Homework Statement I have 2 protons 1 femtometer away from each other, what is the repulsive force between them? q1 = 1.6x10-19C q2 = 1.6x10-19C r = 1x10-15m K = 9x109Nm2/C2 Homework Equations FE=Kqqqw/rw The Attempt at a Solution My answer comes out to be -230.4N but I...