Alpha Definition and 460 Threads

In Rutherford's scattering experiments, alpha particles (charge = +2e) were fired at a gold foil. Consider an alpha particle with an initial kinetic energy K heading directly for the nucleus of a gold atom (charge = +79e). The alpha particle will come to rest when all its initial kinetic energy...

Homework Statement A parallel beam of alpha particles with fixed kinetic energy is normally incident on a piece of gold foil. a) if 100 alpha particles per minute are detected at 20 degrees, how many will be counted at 40, 60, 80 and 100 degrees? b) If the kinetic energy of the incident...

complete data of question: a nitrogen nucleus N(A=14,Z=7) bombared with an alpha particle of a certain energy transmutes to an oxygen nucleus(A=17,Z=8) and a proton a:write a equation for this nuclear reaction b:find the minimum energy of alpha particle to make this reactin occur (mass of...

1. The atomic number of osmium is Z = 76. According to the Bohr model, what is the energy (in joules) of a K X-ray photon? 2. ? 3. The reason I left relavent eqns blank is because I used the following: En = -(13.6) Z^2/n^2 subtracting one from Z before squaring and converting...

Homework Statement Light from the K-alpha line of an unknown material X is compared with the K-alpha line of Carbon. The wavelength ratio is \frac{\lambda_x}{\lambda_c} = 0.148. What is the matieral X? Homework Equations The Attempt at a Solution I've got no idea where to go...

Homework Statement an alpha particle (charge=+2.0e) is sent at high speed toward a gold nuclues Charge= +79e. What is the electrical force acting on the alpha particle when it is 2.0 times 10^ -14m away from the gold nucleus Homework Equations The Attempt at a Solution its 91 N...

In an electromagnetics question I've been asked to calculate the distance of closest approach of an alpha particle which collides with a lead nucleus, but I've never come across the concept of the distance of closest approach. My book is mute on the subject and google yields nothing but more...

Homework Statement Which of the following forces is responsible for the scattering of an alpha particle by a gold atom in the Geiger-Marsden experiment? A. electrostatic force between the alpha particle and the electrons of the gold atom B. Electrostatic force between the alpha...

Homework Statement Alpha particles with an RBE of 13 deliver a 53 mrad whole-body radiation dose to a 65 kg patient. (a) What dosage, in rem, does the patient receive? (b) How much energy is absorbed by the patient (in mJ)? Homework Equations dose in rem = dose in rad x RBE The...

How do I find zeta and alpha in the following circuit? Also how do they relate. Thanks http://img152.imagevenue.com/loc332/th_73834_circuit_122_332lo.JPG

calculating alpha?? A string is wrapped around a uniform solid cylinder of radius r, as shown in the figure. The cylinder can rotate freely about its axis. The loose end of the string is attached to a block. The block and cylinder each have mass m. Find the magnitude alpha of the angular...

Ok so the question is, "A skier of mass 60kg, initially at rest, slides down from the top of a frictionless, icy, hemispherical, mountain with a radius of curvature R of 100m. a)Draw a free body diagram and write the Newton's Equations at the moment when he/she is at some point below the...

A 232 Th (thorium) nucleus at rest decays to a 228 Ra (radon) nucleus with the emission of an alpha particle. The total kinetic energy of the decay fragments is 6.54 x 10^-13 J. An alpha particle has 1.76% of the mass of a 228 Ra nucleus. a) Calculate the kinetic energy of the recoiling 228...

Correct use of "is proportional to" symbol (alpha) Hello, I am facing a problem that can be solved quite easily using the proportional symbol ( I think ), so I would like to try to use it! Only problem is.. I don't know exactly how to use it correctly... The question is :An astronaut weighs...

alpha reciprocal new value is 137.035 999 710(96) (uncertainty 0.70 ppb) http://physicsweb.org/articles/news/10/8/1/1?rss=2.0 "The new value, based on the most precise measurements ever of the magnetic moment of the electron, has an uncertainty of 0.7 parts per billion. The new value is ten...

An alpha particle (the nucleus of a helium atom) consists of two protons and two neutrons. A horizontal beam of alpha particles is injected with a speed of 2.0 105 m/s into a region with a vertical magnetic field of magnitude 0.113 T. (a) How long does it take for an alpha particle to move...

Hi, I'm stuck on the following question. Maybe someone can point out where I'm going wrong. Point A is at a potential of +300 V, and point B is at a potential of -140 V. An alpha particle is a helium nucleus that contains two protons and two neutrons; the neutrons are electrically neutral. An...

"An alpha particle is accelerated in the +x direction through a voltage of 1000V. The particle then moves in an undeflected path between two oppositely charged parallel plates in a uniform magnetic field of 50 mT in the +y direction. (a) If the plates are parallel to the xy plane, what is the...

Hey Recently I have been studied for a physics test on Nuclear Technology. A question I came across asked me to explain the difference between the penetrating ability of the three different types of radiation, alpha, beta and gamma and explain why. I know that gamma has the highest penetrating...

is Alpha Centauri, the closes star to the solar system?

alpha decay problem... Hi all. i can't quite figure out how to modify the equation for this alpha particle decay stuff...any ideas ? http://img190.imageshack.us/img190/7721/picture52an.png i think i need to modify this equation...

Say I travel to Alpha Centauri (4.35 light-years from the Sun) AND back to Earth at 50 percent of speed of light. How much time would the clock on my spaceship and a clock on Earth record me to have taken?

I'm working on a problem in which I'm asked to find the ratio of alpha particles scattering at any angle (assuming equal numbers of scattering nuclei per unit area) now I realize that nt = scattering nuclie per unit area. Does this mean that the above restriction sets nt to 1? Wondering...

How could you distinguish between an alpha and a beta particle in a cloud chamber or a particle accelerator?

Hello, I would like to know the procedure in order to find the beta risk once the hypothesis test has been made. I am aware of the fact that it is efficient to set both alpha and beta prior to data collection, but, in this case, I was given the observations and an alpha value. I used the...

why for that equation does alpha= 2E/(hf)?

Is it possible to make a Bose-Einstein (or Fermi-Dirac) condensate out of alpha particles alone? In other words, is the effective size of a nucleus, like that of a neutral atom, substantially affected by supercool temperatures?

I have this question I need to answer and I am confused. I've checked my notes and book and can't find an answer. Here is the question: "Even though the beta barrel configuration for a transmembrane protein channel would seem an ideal channel, most of the channel proteins have multipass alpha...

An article about the likely magnitudes and feasibility of terrestrial sized rocky planets orbiting in the habitable zones in the Alpha Centauri system: (link removed)AA http://www.publishedauthors.net/aa_spaceagent/

Alright, so I'm new here and don't really know the ropes. This question could go either in Astronomy, or here; but here is better since what I need involves an equation. So first a little about me: I'm new to this forum, and suck at maths. That is all. So maybe some clever mathematician...

a straight footpath makes an angle of aplha with the horizontal. an object P of weight 1250N rests on footpath. the coefficient of friction is 0.1. the least magnitude of a force, acting up the footpath, which will hold the object at rest on the footpath is 50N. by treating the object as a...

This gigantic thing here called the Centauri Princess, can it be built in the next few hundred years? http://www.astroscience.org/abdul-ahad/firstarktoalphacentauri.htm That would be the greatest engineering achievement in all human history...

hello all I thought this might be an interesting question to ask, consider the following series \sum_{n=0}^{\infty}\left(\begin{array}{cc}\alpha\\n \end{array}\right)x^{n}=(1+x)^{\alpha} this is known as the binomial series, what's confusing me is that how could this series exist when...

In the Plenary Session #1 of the Space Nuclear Conference 2005, Samuel C. C. Ting gave a presentation on the AMS-02, the second "Alpha Magnetic Spectrometer." The first, AMS-01, flew aboard the Space Shuttle during Mission STS-91. The AMS homepage is -...

hi, what i am trying to do is maximize the sum of distances to the power alpha between all the points D_{\alpha} (\mathcal{U}) = \sum_{i=1}^m \sum_{\substack{j=1\\j\neq i}}^m|\mathbf{u}_i - \mathbf{u}_j|^\alpha on the surface of a sphere of radius 1 where \mathbf{u} \in \mathbb{R}^3 and...

Alpha particle have a charge? does an alpha particle have charge- like an electron does?

Here I have a problem: A 232/92 Uranium nucleus emits an alpha particle with kinetic energy=5.32MeV. What is the final nucleus and what is the approximate mass(in units) of the final atom. I can write the equation for the reaction, this will give 4/2 He and 228/90 Th. If the alpha particle...

Here I have a problem: A 232/92 Uranium nucleus emits an alpha particle with kinetic energy=5.32MeV. What is the final nucleus and what is the approximate mass(in units) of the final atom. I can write the equation for the reaction, this will give 4/2 He and 228/90 Th. If the alpha particle...

First off I should mention physics is not my expertise and the class I am presenting this argument to knows not much more of physics than Newton's laws. Anyway, for this English class, we were supposed to pick a topic and write a well-constructed research paper, and of course I picked something...

An alpha particle is accelerated to a velocity v in a particle accelerator by a potential difference of 1200 V. Which of the following potential differences would be needed to give the alpha particle twice the velocity? A. 7200 V B. 4800 V C. 4100 V D. 2400 V E. 1700 V At first, I...

hello. i will be appearing for my a levs in a couple of months and this is a 'design experiment' question i need help with. i haven't ever designed an experiment and help will be appreciated. Question: 'Alpha particles from a particular radioactive source have a range of about 6 or 7 cm...

I don't know how many are familiar with this math club, I think it is mostly a southern thing, but here is a question which remains to stump me. --------- Wire of 0.1cm is tightly wound (with no gaps in between layers) around a cylindrical pole of 3cm radius between heights of 0cm and 1cm...

(this post was moved from the Using the Force Constant in Equations thread as it seems to be a branching question.) I just got off work and I usually like to have something to think about while going about my chores. Cleaning is not very demanding, mentally, and radio is just an irritating...

In the Rutherford scattering experiment a very thin gold foil target is bombarded with a beam of a particles of known kinetic energy. A detector which can be moved on a circle around the target counts the scattered particles. What was the impact parameter of a 4.57 MeV a particle if it was...

Abdul Ahad wrote: "A Tiny Ray of Hope in the Eternal Darkness... Successfully locating an Earth-like planet in the habitable zone around one of the two principal 'suns' of the Alpha Centauri system will surely rank as one of the greatest discoveries in the entire history of science. Such...

OK i have this equation: Vf^2 (sin^2 β) = (V2f^2 – 0.75V0) (sin^2 α) and i need to know which angle is bigger: alpha or beta i think its simple but can people give me some answers here?

Can I just replace an Intel processor (like pentium) or an AMD processor, with another type like alpha processor in my PC? Of course I'll have to reinstall the operating system.

Anyone know how to calculate the average spacing between successive ionizations of alpha particles? My case is with 4 MeV particles.

1. Can any other atom besides helium be completely stripped of all its electrons? Are these ever encontered? Can they (C +12, or Fe +26, or U +92 etc.) be isolated and produced as a stream? How do these compare (stability) to alpha particles? 2. As for alpha particles themselves, how long...

i have this equation. While working on a problem i came across this. I need to solve for alpha. I can't seem to get anywere. I tried the problem two ways and end up havin the same problem so any help be appreciated. Thanks in advance Solve for alpha M/rF = Sin(alpha)Cos(theta) +...