Alpha particle Definition and 135 Threads

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...

Homework Statement Hey, first time poster here, I'm current writing up a lab report I just wanted to check my method is correct. I'm doing alpha particle spectroscopy using a cloud chamber setup. Most published reports seem to vary pressure (so the mass thickness varies). Our chamber let us...

Between 1909 and 1911 the current model of an atom was Thomson's plum pudding however this was disproved by Rutherford's experiment. So the question is, if Thomson's model was true what would of happened when the alpha particles was aimed at the gold foil?

i'm struggling to understand this: an alpha particle is emitted with a kenetic energy T, if we know the value of the depth of the nuclear potential well V, we find the kenetic energy of the alpha particle inside the nuclei by substructing V-T , would you please explain this to me? Thank's

Alpha particle emits when no. of neutrons in an atom are much more... My ques. Is that the no. Of protons and neutrons emitted are same so the substance formed after the reaction should still have much more neutrons than protons.. Infact mathematically the ratio increases.

Homework Statement When a 7 3 Li nucleus is bombarded with protons α particles emerge.Calculate the kinetic energy of the alpha particle assuming the kinetic energy of the bombarding proton to be negligible. Given M (7 3 Li)=7.016004a.m.u. M (p)=1.007826a.m.u and M (α)=4.002603a.m.u. Homework...

Homework Statement The nuclear masses of parent and daughter nuclei are Mp= 226.025 amu and Md=222.017 amu.Mass of alpha particle is Mα=4.002amu.Find qvalue and kinetic energy of alpha particle emitted for the alpha decay. Homework Equations Q=(Mp -Md-Mα)amu...1 Assuming nucleus to be at rest...

Homework Statement An alpha particle (the nucleus of a helium atom) is at rest at the origin of a Cartesian coordinate system. A proton is moving with a velocity of v towards the alpha particle in the xˆ direction. If the proton is initially far enough away to have no potential energy, how...

Homework Statement http://puu.sh/bz0km/092f2d8781.png Homework Equations h^2/2ma^2 The Attempt at a Solution I've found the uncertainty of the kinetic energy through many means, and I'm confident that it's .052MeV. The easiest method that gave me this answer was: using...

Homework Statement For the nuclear reaction, 1 neutron (1/0n) + 10/5B → 7/3L + 4/2He (alpha particle) assume that the initial kinetic energy and momentum of the reacting particles are negligible. Calculate the speed of the alpha particle immediately after it leaves the reaction. Homework...

An alpha particle is thrown toward a gold nucleus. An alpha particle has two neutrons and two protons and a load module 2e, where "e" is the electron charge, while the gold nucleus has 79 protons and a load module 79e. What is the minimum kinetic energy that the alpha particle must have in order...

Homework Statement On the diagram below, draw vectors to show the magnitude and direction of the electric forces acting between an alpha particle and an electron. (++) (-) (I can do that bit) Hence state and explain which of the two particles will experience great acceleration...

1. Is there any way to prove that the alpha particle is a boson (its total wave function is symmetric), given that it's made up of two protons (fermions) and two neutrons (fermions)? Homework Equations The total wave function for two identical particles that are (bosons) ψ_tot = 1/√2 * (ψ_a...

Homework Statement Homework Equations r=mv/qb mv=sqrt(2*KE*m(alpha)) m(alpha)=6.64e-27 kg The Attempt at a Solution i was just wondering how to get the answer (7.6e-4 m). i get path curving down, and do r=sqrt(2*1e3eV*6.64e-27kg*1.6e-19J/eV)/(q*B) =15.18e-4m so to get the...

Hey guys, I am having a hard time solving for this problem, and I can't seem to figure out what I am doing wrong. Homework Statement In the form of radioactive decay known as alpha decay, an unstable nucleus emits a helium-atom nucleus, which is called an alpha particle. An alpha particle...

Homework Statement An alpha particle (4 times the mass of a proton with a charge of +2e) is at rest 1.0 * 10^-12 m from a stationary proton. The 2 particles immediately move apart. Find the speed of each particle when they are infinitely far from each other. Homework Equations...

Homework Statement could you help me for the question b? Homework Equations E = mc^2 The Attempt at a Solution the mass of the alpha particle is 0.66466 x 10^-26 kg >> 4.022 u put it into the equation, so E = 4.022 x c x c = 3.615 x 10^17 eV >> 0.0579 joule my answer is that, but my...

An alpha particle is moving in the positive x direction with a speed of 0.0050c = 1.50 * 10^6. When the particle is at the orgin, find the magnetic field at a) P3: x = 1.0,y = 1.0,z = 1.0 The book answer is r3 = sqrt(3) = 1.73 and vecto r3 from q to p3 and vector v form a plane that makes...

Hi, The decay constant for alpha decay is the product of the transmission probability P and the collision frequency f of the alpha with the potential barrier, where f depends on velocity of the alpha in the nucleus. My question is about this Hyperphysics page, where alpha decay is modeled...

A theoretical question , imagine we have a theoretical spherical confinement (don't tell me it;s not possible as I know that already :) ) Now we would set that spherical confinement to a high positive potential , inside it we would have a ionized gas , now the electrons would tend to distribute...

I am given with the activity of alpha particle.How could i calculate its energy from it?

(answered)Four Protons Are Fused Into Alpha Particle, Energy Released Answered: I wasn't supposed to multiply by c2. Thank you ehild I apologize in advance if I posted this in an incorrect format or in the wrong section. I read the rules and I believe this is the correct format/place...

Homework Statement For the decay " Uranium-232 ---> Thorium-228 + alpha particle ", What is the alpha particle's kinetic energy in the U-232 atom's rest frame? We are given the masses for each one. Homework Equations E = mc^2 The Attempt at a Solution I tried mass(U-232) -...

Homework Statement If a beam of 9.39 x10^20 alpha particles passes a given point in 1.50s, what is the current? Homework Equations I=q/t The Attempt at a Solution umm the answer is 2.00 x 10^2 A, not sure where to begin. Would be a great help if someone can point me to the right...

Suppose an electron was kept with an alpha particle at a finite separation x. Why does it have a negative potential ENERGY ... In other words, what does a negative electric potential energy mean? I want an answer relating it with potential energy at infinity which is zero. Secondly, if the...

I am fairly new to nuclear chemistry and I was just curious as how to find the half life of a helium nucleus. Would it be the same as finding the half life of 1 neutron x2 and 1 proton x2? Or is this the completely wrong way to do this. Also would the half life be the same as a helium atom or...

Homework Statement A proton strikes a stationary alpha particle (4He nucleus) head-on. Assuming the collision is completely elastic, what fraction of the proton’s kinetic energy is transferred to the alpha particle? Homework Equations Pi = Pf Ki = Kf The Attempt at a Solution For...

Homework Statement We have an alpha particle moving in the air (p=10^5 Pa). Its range is "d". What would be the range if the pressure was q=10 Pa only. Homework Equations x=d*(p/q) ? The Attempt at a Solution I think the particle is slowed down the more the more is the number of...

This is not a homework question, but it is from a book... The book asks: In a nuclear chemistry experiment, an alpha particle is found to have a velocity of 14,285 m/s. Convert this measurement into miles/hour. I want to verify the correct way to do this, and I also have a question about...

Homework Statement "If an alpha particle is fired straight at the nucleus of an uranium atom (q = 92e), at a velocity of 5 x 10^5 m/s, how close will it get to the uranium nucleus? Homework Equations Ek = (mv^2)/2 Ee = (kq1q2)/d The Attempt at a Solution Since the alpha particle and...

What is the main cause that alpha particle has the highest ionisation out of the beta and gamma... Is it because of it's LARGE MASS or LARGE MAGNITUDE OF CHARGE?? This leads me to the general question.. How does ionistation occur and what affects it.. Mass or CHarge??

Homework Statement The nucleus of beryllium with mass number 8 decays into two alpha particles. The nuclear masses are M(8Be)=7456.6 MeV/c^2 and m(4He)=3727.4 MeV/c2. Assume that 8Be decays at rest and that we can neglect the atomic electrons. We are asked to find a) the kinetic energy of...

Homework Statement A proton is projected into a magnetic field of 0.5 T directed into the page. If the proton is traveling at 3.4 × 10^5 m/s in a direction [up 28 ̊ right], what is the magnitude and direc- tion of the magnetic force on the proton?Homework Equations F = vBq(sin θ)The Attempt...

Hi all, me again! :rolleyes: I'm trying to calculate the current created when an alpha particle strikes a silicon p-n detector, but I'm getting some strange numbers, so I was wondering if I was doing something fundamentally wrong... My problems start when I try to calculate the reverse...

Homework Statement What is the equation for the reaction of a alpha particle and beryllium with production of one neutron Homework Equations Use an a chem equation The Attempt at a Solution The masses are 4 + 9 = 1 + x, so x = 12. The atomic numbers (protons) are 2 + 4 = 0 + x...

Homework Statement In \alpha decay a nucleus X at rest decays to a daughter nucleus Y and an \alpha particle. Conservation of momentum and kinetic energy gives: M_{\alpha}v_{\alpha}+M_{Y}v_{Y}=0 \frac{1}{2}M_{\alpha}v_{\alpha}^{2}+\frac{1}{2}M_{Y}v_{Y}^{2}=Q Where the Q value is the...

Homework Statement An alpha particle has a mass m = 6.64x10^-27 kg and a charge q = +2e. Compare the force of electric repulsion between two alpha particles and the force of gravitational attraction between them. Explain briefly why the gravitational force is ever significant, given its...

Homework Statement If the radius of the gold nucleus is 6.47 fm, and the radius of the α particle is 2.36 fm, then what is the minimum required kinetic energy for the α particle if we want the two nuclear surfaces to touch in a head-on collision? Homework Equations Ue=(kq1q2)/r The...

Can anyone help with this problem? I think the solution may be simpler than I'm trying to make it. Colin measured the speed of an alpha particle that was emitted from a U-238 nucleus to be 2.20x10^8 m/sec. Calculate the kinetic energy of the alpha. Is all you need the equation KE = 1/2...

Homework Statement Problem: "Find the kinetic energy of an alpha emitted during the alpha decay of Rn-220. Assume that the daughter Po-216, has zero recoil velocity." Homework Equations Ei = Ef The Attempt at a Solution BE = Binding Energy, KE = Kinetic Energy (BE of Rn-220) = (BE of...

Homework Statement When detecting alpha decay with a spectrometer, why is it important to evacuate the chamber to create a adequate vacuum for where the source is place? Why is it better to place a radioactive source underneath a detector facing up rather than above the detector and facing...

Homework Statement An alpha particle (two protons and two neutrons) traveling east at 2.0 x 105 m/s enters a magnetic field of 0.20 T pointing straight up. What is the force acting on the alpha particle? Homework Equations F = qvBsinøThe Attempt at a Solution With the fingers of the right hand...

Why their tracks after collision has an angle 90 degree? Any detail derive?

When a proton is fused with lithium and two alpha particles are formed, how do you know which direction they'll go. I thought they would take roughly the same path as the accelerated proton, but in the explanations of Cockroft and Walton's setup, they show the lithium at a 45 degree angle and...

Homework Statement An Alpha Particle is emitted with a kinetic energy of 2.34 MeV during a radioactive decay process. The maximum speed of the alpha particle is? Homework Equations KE=mv2 1 ev = 1.6x10-19j The Attempt at a Solution \sqrt{(2.34x10^6)(1.6x10^-19)/4(1.6x10^-27)} Unfortunately...

Homework Statement What is the charge of an alpha particle? Charge of electron = 2.50x10^-21 Homework Equations The Attempt at a Solution Would you have to multipy 2.50x10^-21 x 2 to get the charge?

Hi, I want to know why a small change in energy released, Q, in alpha particle decay leads to a large change in the lifetime. Also could anyone provide me with a link that shows a diagram of the energy spectrum of alpha particles. Thanks.

Homework Statement An alpha particle is bombarded on 14 N. As a result a 17 O nucleus is formed, and a particle is emitted. This particle is a: (a) neutron (b) proton...

Homework Statement Show that kinetic energy acquired by an alpha particle during an alpha decay is Talpha=Q/[1+[maplha/mD] Homework Equations Q=[mP-mD-malpha]c^2 The Attempt at a Solution Q is the release of energy which is acquired by the daughter nucleus and the alpha...

1. The predictions of Rutherford's scattering formula failed to correspond with experimental data when the energy of the incoming alpha particles exceeded 32MeV. This can be explained by the fact that the predictions of the formula apply when the only force involved is the electromagnetic force...