Neutrons Definition and 224 Threads

do neutrons also feel strong nuclear force and if they do how is that possible because they are uncharched and no force is required to keep them together ?

An element of helium consists of 2 protons, 2 neutrons, and 2 electrons. I have been told that anti-helium can exist if instead of 2 protons there are 2 antiprotons, instead of 2 neutrons there are 2 antineutrons, and instead of the 2 electrons there are 2 positrons. Is this true? Also...

What would happen if you fired a neutron at neutronium? Would it become apart of the neutronium substance of would it shatter the neutronium substance if the velocity of the neutron particle were quick enough? Thanks F.L.

Ok so something been bother me about neutrons lately. When want to move a bunch of neutrons from approx, point a to approx. point b, is around how do you it? I didn't yo couldn use a supwercollider since: neutrons are neutrally charg; therefore, you cannnot move them with a intense electric...

This might be a dumb question but can neutrons emit photons.

I'm just wondering why it's important for atomic structures to contain protons. Hydrogen-3 has two neutrons and one proton. Could you have a particle with two or more neutrons held together by nothing but the strong nuclear force? Is the reason I don't know about this because such particles...

My professor told me that the neutrons in a reactor see the surface area of nuclei, and not the the projected cross section. That really doesn't make intuitive sense. Is he right?

Hi Members, Can electrons be converted into neutrons? I read it somewhere and not sure about it!

I am aware that there is strong evidence for the presence of quarks inside of protons and neutrons through the analysis of deep inelastic scattering experiments. The questions I have specifically relate to the data which supports the composition of the neutron versus the proton, how we have...

Homework Statement A bar of copper has dimensions 0.5605 ft. x 3.545 in x 5.722 cm. The density of copper is 8.921 g / cm3. Copper contains 2 isotopes, 63Cu (69.09% abundant) and 65Cu (30.91% abundant). How many neutrons are in the bar of copper? The attempt at a solution I took the...

Sorry, this is probably a dumb question but I am new to physics so forgive my ignorance. I learned in class that when a person touches something, or any two objects touch each other for that matter, the force interaction is actually due to the electrons repelling each other. So I wondered what...

As I understand it, the magnetic field confines the electrons because of the repulsion of the electrons in the plasma and the electrons traveling in the magnetic current. My question is what keeps the protons and neutrons released in the plasma from passing through the magnetic field in a...

If an nuclide can be fissioned by thermal neutrons does that always mean it can be fissioned by fast neutrons. If not how can one tell this by looking at the neutron cross section?

The nuetron has a known substructure of three charged quarks with net charge 0. Still, these quarks cannot occupy the same space simultaneously, so neutrons should have an electric field surrounding them. Has any work been done to find the properties of this field? For example, what is the...

U-235 is most suitable for bombardment by slow neutrons 'cause it becomes U-236,providing for a more balanced nucleus. So if the electron shells are arranged something like 2,4,8,16,32,18,8,2 the atomic number only changes, in this case, because of an additional neutron. Is this element in a...

Neutrons bind Protons in nuclei, and/or the other way around, but why don't Neutrons bind Neutrons, with clumps of neutrons whizzing about? And, I'm guessing this is related: Why is a Neutron unstable outside its nucleus with about a 10.3 minute half-life?

I am wondering about something: Calculate the Fermi energy for the neutrons confined to a nucleus with 40 protons and 50 neutrons which roughly forms a sphere of radius 4.6 10^(-15) m. the formula of the fermi Energy is EF= ((h-bar)^2*(3*pi^2*n)^(2/3))/2m m:mass of electron, n = number...

Homework Statement You have 10 protons and 10 neutrons to paly with (mass of oxygen = 15.994915) a. What is the mass of an oxygen nucleus that you build with equal numbers of protons and neutrons? b. What is the binding energy of this nucleus? Homework Equations E=mc^2...

I have a very basic question regarding the nucleus. I understand why you can only have a limited number of protons within the nucleus - more and more protons within the nucleus will increase the coulomb potential and cause the nucleus to be unstable. But why is this so for neutrons? Why...

Homework Statement At very high temperatures (as in the early universe), the proton and the neutron can be thought of as two different states of the same particle, called the “nucleon”. (The reactions that convert a proton to a neutron or vice versa require the absorption of an electron or a...

Could someone please explain to me why stationary neutrons may radioactively decay but protons may not? Thank you in advance :)

I heard that protons and neutrons, as well as electrons pop into and out of existence. Is this by experiment, or mathmatics. Thankyou

First of this is not an homework question but just a bit of a theory i am having a bit of difficulty understanding. Secundly, hello! James Chadwick discovered neutrons by sending alpha-particles from a radioactive source to a beryllium-plate, and that plate then sent out neutrons. I don't...

Question: The postulate that mass attracts mass is present in both the classical description of gravity and GR. My question is related to the extra nuetrons in heavy atoms, if there is experimental evidence that these extra neutrons are also part of the equation. I wish to read about...

Hey guys this is my first post on Physics Forums, be gentle. I've been wondering, what's the current explanation of why protons and neutrons have such very similar masses? Is this due to a difference in the up and down quark masses or is there something else going on here? Thanks

Atomic wieght... I know, or at least think the wieght of an atom is the number of neutrons...but what I want to know is what governs this number? Is it a gravitational force...I mean all this spinning going on...how can they be so small, so close together and not bump into each other?--what...

An isotropic point source of neutrons emits 10E8 fast neutrons per second. It is 3m horizontally away from a train track. A train goes by at 60 miles per hour. Ignoring scattering and attenuation, what is the fluence (i.e. neutrons per meter square) of neutrons that would strike a pasenger at...

My textbook said that only lower energy neutrons (around 1ev) favor Uranium fission while higher energy neutrons don't. Is there an explanation for this. ( i don't think we are required to know it for the course but I'm just interested...) Thanks.

This might be a silly question, but do protons and neutrons have a wave function that they can be described by?

Problem One thousand neutrons are in a one-dimensional box, with walls at x = 0, x = a. At t = 0, the state of each particle is \psi(x, 0) = Ax(x-a) a) Normalize \psi and find the value of the constant A. b) How many particles are in the interval (0, a/2) at t=0? c)How many particles...

Hi all. Why does Uranium-238 absorb fast moving neutrons very well but not slow moving ones? My intuition tells me it should be the other way around but its not. Thanks.

Quick question, regarding mass-energy equivalence (e=mc2) and matter creation. Knowing that there are many concete visual examples of matter turning into energy using Einstein's equation, how do you use energy to create matter? If I'm not mistaken, I believe electron-positron pairs are...

Before you go on: I had no idea were to actually post this, as I found no other good forums on the net where you could discuss physics. If a mood locks or moves this topic, I fully understand. Please don't flame the thread though. Leave that to the mods :) After playing the game Mutants and...

what elements are used to prevent losing neutrons and what are the ways of preventing losing of neutrons in nuclear power plant and atomic bomb?

Is possible some elements (like Cadmium or Bohr) absorb neutrons, without any nuclear reaction in their atomic nucleus? If the answer is YES, then why there isn't any nuclear reaction?

Hi, is there anyone that can tell how neutrons are accelerated for experimental use.

1. I have ^{9}Be^{+}, ^{12}C, and ^{15}N^{+++} isotopes, and I need to find the total of protons, neutrons, and electrons. A = Z + N, where A is the atomic mass number and Z is the number of protons and N is the number of Neutrons. 3. I know this is an easy question, I put it in physics because...

How does deuterium interacts with neutrons? I sow in nuclear power plants is used heavy water, and it says because the heavy water interacts with neutrons? Is it mechanically stopping them, or there is some other kind of interaction? btw- how neutrons in deuterium stick together, how they are...

Sorry if this is a really easy question, but in biology I don't normally deal with these matters, just confused about this. Why is it that the mass of the electron is so much smaller than that of the proton or neutron, but the charge is similar to the proton (but opposite)? I'm assuming it has...

My question is about the formation of a neutron star once fussion stops and it collapses. I recently saw a show about the life of a star and it said when gravity overcomes the energy released by fussion, the electrons are compressed toward the nucleus of the atoms and create neutrons. I...

Homework Statement Canadian nuclear reactors use heavy water moderators in which elastic collisions occur between neutrons and deuterons of mass 2.0u. a.) What is the speed of a neutron expressed as a fraction of its original speed, after a head-on elastic collision with a deuteron which is...

Homework Statement state the number of protons electrons and neutrons of these: Magnesium-25 Cu-65 Homework Equations protons is the same as atomic numbber, same with electrons. NEUTrons is atomic number - atomic mass The Attempt at a Solution Magnesium-25 Cu-65...

Hi, We were told in a very-elementary elementary particles course, that a neutral current event was first observed in the following process: \bar{\nu}_\mu + n \longrightarrow \bar{\nu}_\mu + X were X is "something other than muon" (n was a neutron). I thought about it, and I don't know how X...

I have this question Why U-235 is fissionable by thermal neutrons whereas U-238 requires E>1.4MeV Thank you:

Hi all, I have a question, which sounds somewhat silly, but I'm stuck with it. I'm writing some monte carlo code to simulate the effect of multiple hits on neutron detectors, and I'm confronted with the following issue. Consider a "multiple hit" of a detector. That means, a neutron impact at...

When neutrons come together energy is emitted.If there are a lot of neutrons close together in a ball,will the energy emitted by the neutrons at the centre of the ball push the neutrons nearer the surface out of the ball?

Can we have a nucleus containing neutrons alone? Thanks in advance.

According to a textbook that I was looking at, electron capture and electron-proton collisions both produced a neutron and an antineutrino, but one was mediated by a W+ particle and the other by a W-. Is this correct, or are they interchangeable?

Hi, I was wondering if anyone could give me a simple description on what nuclear power is. I.e. how the neutrons from UO2/U/PuO2 are harnessed for power? Also, if anyone knows any useful links for information on nuclear power, different types of ractors etc, then it will be very useful :smile:

In each fission event of nuclear 3 neutrons are released. Is that for all nuclear reactions or just U-235?