Beta Definition and 384 Threads

I am completing an assignment that is covering alpha, beta, and gamma decay. I am going to try and keep this as general as possible, as I want to figure this out myself but I just looking for feedback to make sure I am on the right track. I noticed that after alpha decay, the mass of the...

Homework Statement What is the maximum kinetic energy (in keV to 3 significant figures) of an electron emitted in the beta decay of a free neutron? Write down the decay equation using accepted notation. Mass of a Neutron: 1.008665 u Mass of a Proton: 1.007276 u Mass of an Electron...

So my question has a few parts to it. First, if an atom is decaying and the proton (Z) number is decreasing in the decay process, am I correct in assuming that the nucleus is either decaying by electron capture of beta plus emission? Secondly, I understand that beta plus emission can only...

Why does β+ decay occur? If protons are stable and all baryons eventually decay to protons, then how is it that protons can 'decay' to a neutron? What causes this to happen? (I assume it isn't as frequent as β- decay, or up and down quarks would be coming and going constantly, and we'd be...

Question Two monochromatic light sources approach each other head-on with equal speeds, v=\beta c relative to the laboratory. When they pass each other, the frequency of the light each receives from the other is halved. Show that \beta =3-\sqrt{8} Attempt at solution I have tried to...

Ok, I'm having some conceptual difficulty here. When discussing beta functions and the relation how these differential equations flow, I still don't quite get the difference between relevant vs. marginally relevant and irrelevant vs. marginally irrelevant. For instance, take the β function...

Homework Statement I have this incomplete Beta function question I need to solve using the Beta function. \int^{a}_{0}y^{4}\sqrt{a^{2}-y^{2}}dy Homework Equations Is there an obvious substitution which will help convert to a variant of Beta? Beta function and variants are in Beta_function...

[b]1. Astatine-210 decays through a beta-plus decay process. Use the table in section 29-8 (see the link above) to find the relevant masses for this decay, and calculate the energy (in MeV) released by the decay of one such atom. You can neglect the mass of the neutrino that is one of the decay...

So I feel like a complete moron for asking this. I have never been very strong in geometry so I wondered if a few math folks could help me out. I am just looking for the angle relationships of gamma, alpha, and beta. This is just a small piece of a much larger analysis that I am doing. I...

Hello all, I just built an expansion cloud chamber and noted that while my alpha source (americium 241) produced a plethora of tracks, the beta source (strontium 90) produced no tracks at all-just mist. Does anyone know if beta radiation can be seen in an expansion type cloud chamber? Why or...

Homework Statement An \alpha-particle and a β-particle are both traveling along the same path at a speed of 1.5x106 ms-1. They then enter a region of uniform magnetic field. The field is a square with sides of 1 cm. The magnetic field is normal to the path of the particles and is into...

Does a Beta(?) Particle as a whole, comprise electrons and anti-neutrino?? or just a electron??

Determine the values of the complex parameters p and q for which the beta function \int_0^1 t^{p-1} (1-t)^{q-1}dt converges absolutely. The solution says: Split the integral into 2 parts: \displaystyle \int_0^1 t^{p-1} (1-t)^{q-1}dt = \int_0^{1/2} t^{p-1} (1-t)^{q-1}dt + \int_{1/2}^1...

Hello, my question is : C60 ---> Ni60+e-+anti-neutrino why does Co60 decay to an excited state of Ni60 and not directly to its ground state? and why does the Ni emite two photons (first transition from the second excited state to the first excited state and from the first excited state to...

Hi guys this is my first post since I've joined, so be nice! I've been playing around with a short lens spectrometer at uni, using a strontium-90 beta source. It basically consists of a long steel tube with the source housed at one end, and a solid state detector at the other, mid way there is...

Once (1-x)^n-1 is replaced by (1-a)^n-1 where a>1, the form of the integral changed drastically (I can't find a proper substitution in order to transform the new integral to Beta), does anyone know how to compute the new integral then? (I presume the result will still involve Gamma functions...

What's the point of measuring alpha and beta radiation in Sievert? As I understand it, one Sievert is an equivalent of 1 Joule absorbed by 1kg of body mass. But since alpha and beta radiation barely penetrate the human skin, most of the body mass isn't irradiated at all. So the dose in...

Homework Statement Given, β=100, Is = 6E-16 See attachment. a) Find min value of Rb such that the BJT is in active region b) For the Rb found, what is the base-collector voltage if β=200 Homework Equations The Attempt at a Solution Assuming, VCE min for active region operation...

Homework Statement the problem is in the figure Homework Equations beta function = ∫u^x-1 * (1-u)^y-1 du " the integral is form 0 to 1" The Attempt at a Solution to use the beta function the integral must be from 0 to 1 but this problem is from 0 to a so i let X^2=a^2 * t and...

I understand how beta decay works on a fundamental level, in that either an up or down quark in the one of the nucleons decays into an up or down quark and in the process, a W boson is emitted which in turn decays into an electron and an electron antineutrino or opposites thereof depending on...

Hi I'm wondering if someone could help me out finding the Q-value fom a beta minus decay. It's a 90Y → 90Zr + e All sources I have says that the energy released is 2,28 MeV, but when i calculate i get 1,78 MeV So far, I've looked up the mass of the 90Y and the Zr90 and the electron...

Hello, I am working on a problem in which I first sample two unknown probabilities, p and q, from Beta distributions, and then I want to sample both of them at the same time from a multivariate Beta distribution. This is the code that I have for sampling p and q individually from Beta...

Are Alpha and Beta rays electromagnetic ? If yes, then how ? I would like to know how negatively charged beta ray comes from the nucleus ? Thanks !

For the BJT in the reverse active region, why shouldn't you dope the emitter and collector almost equally, even though it will increase beta_r? Also, what are some ways you can increase beta_r (in reverse active) or beta_f (in forward active)?

Homework Statement The atomic mass of 55 25Mn = 54.938047u and that of 55 26Fe=54.938296u. Explain which of the three possible β-decay processes involving these two nuclides are forbidden, and which can occur. For decays which can occur, describe the energy spectrum of the products...

Homework Statement Why are beta particles less penetrating than x-rays?

Homework Statement Find the expected value of g(X) = Xk for the a. gamma distribution b. beta distribution c. lognormal distribution Homework Equations gamma distribution: \frac{x^{\alpha -1}e^{ \frac{-x}{\beta}}}{ \Gamma (\alpha ) \beta ^{\alpha }} with paramenter x>0 beta...

"Beta particles are high-energy, high-speed electrons or positrons emitted by certain types of radioactive nuclei such as potassium-40. The beta particles emitted are a form of ionizing radiation also known as beta rays. " Negative charges also contain electrons, Beta particle are...

Hello! I'm trying to do a satisfactory derivation of the Boltzmann distribution. By using lagrange multipliers I've come as far as to prove that P(i) = \frac{1}{Z} e^{-\beta E(i)} where Z = \sum_i e^{-\beta E(i)}, but how does one actually establish that \beta = 1/kT?

Homework Statement 1. The Beta distribution: A Beta random variable is a positive continuous random variable dened on [0; 1] that has two parameters associated with it, usually denoted  and . Both  and  must be positive real numbers. The beta distribution is used to model the...

Beta decay is when a neutron creates a proton and an electron and the electron is then expelled, right? So I was wondering, why would the new atom formed not be an ion? If the neutron became a proton, the mass number should stay the same, and the atomic number should increase by 1 since...

[PLAIN]http://img543.imageshack.us/img543/4545/asdfrr.jpg I'm wondering what the mechanism would be of the reaction in the pic I've attached. It does seem the Beta carbon acts as a nucleophile and attacks the carboxylic acid. I have a couple of questions, one general (#1) and one specific to...

Am I right in thinking Fermi type beta decay is helicity suppressed, due to the necessity of having a right handed electron? This was implied but not explicitly stated in my lectures. And is this why Gamow-Teller type beta decay is the generally favoured mode?

The alpha beta filter equation is given by this Xni = AXn + BXn-1 Xn-1 is subscript i want to figure the solution to this recurrence relation, but is it a recurrence relation? i am wondering weather alpha beta filters grow faster than exponential smoothing filters.- i said it is a 1st order...

In a book I'm reading, it says: If beta is orthogonal to the set A, then beta is orthogonal to the closure of the linear span of A It's easy to see beta is orthogonal to the linear span of A, but I don't understand why it has to mention closure here?

Homework Statement a) What is the energy of the neutrino, if a phosphorus-32 atom (31.97390 u) beta-decays into a sulphur-32 atom (31.97207 u), and the kinetic energy of the accompanying electron is 0.90 MeV? (answer: 0.25 MeV) b) A boron-12 atom (12.01435 u) beta-decays into a...

This is probably a dumb question, but a student asked me and I can't figure out the answer: When a nucleus decays via beta decay, for example (in poorly formatted text): 55 Cs → 56 Ba + e− + ν How is overall charge neutrality conserved? Clearly, the reaction appears to conserve...

I know odd-odd nuclei are generally unstable against beta decay as the pairing term in the semi-empirical mass formula is less than zero, and I know even-even nuclei are generally stable, but I don't get the rules you apply for even-odd or odd-even nuclei. Do you have to work out the binding...

I'm dealing with this problem for an MCAT review: Following beta-emission by a neutral atom at rest, the respective linear momentums of the beta(-) particle and the resulting atom are shown below. (see attachment for message) It wasn't too difficult to see that an extra force is in play, and...

Do exist some proposed nuclear fuel cycle in which uranium or thorium whoud be first converted in some beta or alpha emitting isotope and after energy whould be harnessed with direct energy conversion methods?Possibly, it could reduce size of power plant and make steam turbine unnecessary.

For beta minus decay, I know the reaction is given by neutron -> proton+electron+anti(electron)neutrino. This is an image of the Feynman diagram for the reaction: http://tmp.kiwix.org:4201/I/280px_Beta_Negative_Decay_svg.png I get that the neutron changes to a proton releasing a w-...

The A level book that AS students have for the AQA course has a Feynman diagram of a proton decaying into a neutron - via a W boson, producing a beta+ and a neutrino. afaiaa, protons have a lifetime of 1033 years, so this doesn't seem a likely event. Is this just a 'fictional' event, put in the...

What would be the best protection from these two at the same time? Lead alone or a mixture of something like lead and Plexiglas?

Hey so, I was just wondering: If Carbon-14 (6 protons, 8 neutrons) decays into an electron, a neutrino, and Nitrogen 14 (7 protons, 7 neutrons) How is charge conserved? I get that nucleons are conserved, but if nitrogen-14 is neutral, then it has 7 protons and 7 electrons, versus Carbon...

In beta decat the u quark fromthe proton and the d quark from the neutron interact to produce a electron and it's neutrino. I'm wondering about the charge conservation of this process because a neutron has zero charge and a proton has charge of 1. How do we end up with a electron charge of -1 at...

Homework Statement Does a baseball on a slinky have a smaller Beta, or balloon on a slinky? Explain. Homework Equations Beta = b/sqrt(mk) b: damping coefficient m: mass k: spring constant The Attempt at a Solution I see that the spring constant k is the same for either...

Homework Statement On one of the homework problems on NPN type transistor, I am asked to find Beta. What does Beta mean? Is it amplification? Is there equation for it? Homework Equations I'm looking for an equation The Attempt at a Solution

Homework Statement An alpha particle and beta particle, each with kinetic energy 35keV , are sent through a 1.1T magnetic field. The particles move perpendicular to the field. Homework Equations no idea. The Attempt at a Solution theres nothing on curvature radius in my...

Homework Statement see attachment Homework Equations r=RoA1/3 Ro=1.2*10-15 The Attempt at a Solution 35 kiloelectron volts = 5.60761762 × 10-15 joules I could calculate the velocity if I knew mass but that wouldn't help with the radius? I think that I need to find A from the...

[SIZE="5"]What CAUSES alpha, beta and gamma rays?