Alpha Definition and 475 Threads

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...

As a physics student, I understand that α particles are emitted and are the same as helium atoms without electrons. But this raises two questions to me: 1) What happens with the electrons at the atom that emits them? He now has two electrons too much. What happens with those? 2) Why an...

I think a lot a users have vague concepts about the roots of unity. I try to post a link to WolframAlpha, which calculates all the second roots of unity http://www.wolframalpha.com/input/?i=sqrt%281%29 There you can see the input \sqrt{1} and the plot of all roots in the complex plane...

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...

Hi All, I am looking into engineering and physics grad schools. I have a good deal of information available, and am trying to sort through it. Has anyone used Wolfram Alpha to do anythings like this? From basic comparisons like "Harvard University, Princeton University" it will give you a...

Homework Statement "How could you show that a radioactive source was only emitting alpha and gamma radiation?"The attempt at a solution This really stumped me...obviously they have different penetration distances, and different strengths of ionisation, but I don't know how to show that only...

The so called 'Moebious Function' is a discrete function defined as... $$\mu(n)= \begin{cases} - 1 &\text{if n has an odd number of prime distinct fators} \\ 0 &\text{if n has one or more prime fractors with exponent greater than one}\\ 1 &\text{if n has an even number of prime distinct...

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...

I'm noticing wolfram alpha has the amazing ability to analytically solve \sum_{n=1}^{\infty} \frac{1}{n^2 + a^2} Anyone know how to do this, and if it's also possible to deal with higher order guys (like it also can do 1/(n4+a2), but it's a way more complicated expression to the point...

So I recently heard of a simple way of thinking about how the emission of an alpha particle is "beneficial" to a nucleus being stable. The argument goes as follows: "Let's say we have a nucleus that is unstable because the electric repulsion of protons can't balance out the strong force...

So Alpha Centauri is about 4.37 lightyears from earth, but that's in Earth's frame of reference, if you could build a spaceship to go, say 9/10c relative to Earth how long would it take to get to alpha centauri, because then space-time would be warped and therefore it would no longer be 4.37...

Homework Statement Ok well I had a real nasty equation in which i could not solve. I used wolfram alpha to get out this answer "theta ≈ 0.74559 + 6.28319n for integer n". can someone please tell me what this statement means. do i assume theta in degrees equals 0.74559(180/pi)...

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) -...

Before I sound stupid I am only at GCSE level (high school in America) so understanding is little. But theoretically could an alpha particle (helium nucleus) gain electrons and become a helium atom. If this is possible can it be done with two beta particles? Correct me I in wrong an explain why...

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...

http://blog.wolframalpha.com/2013/04/01/introducing-the-wolframalpha-handwritten-knowledge-engine/ Hmm. Could this be an April Fools Day exercise?

Homework Statement A nuclei of a atomic number Z decays into a alpha particle (a He nucleus with Z =2) and a daughter nucleus with (Z_{d}). The decay may be described as the tunneling of an alpha-particle through a barrier caused by the Coulomb potential between the daughter and the...

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...

See attached image. Can't seem to get alpha to compute this. Had this in a test and it stumped me. Could someone explain how to find the limit? Thanks in advance guys.

Hi, I'm confused about a statement about the change in final/initial states of the daughter/parent atom in an alpha decay. It is the following; "The spin between the parent (I_i) and daughter (I_f) can change by lh (h being h-bar, l is the orbital angular quantum number of the alpha particle)...

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...

From an experimental study I've found that alpha helices are formed more often than beta sheets when the temperature is low, but when the temperature increases the beta sheets becomes more common. I'm trying to figure out why. As temperature increases, the outer hydrogen bonds of a structure...

I am looking for an alpha detector to do an alpha spectroscopy (and maybe beta as well). The rough setup is a vacuum tube with a detector in one end and a source in the other, possibly with a magnet in the middle. I have googled around, but my problem is that I don't really know what is...

Hello Physics Enthusiasts The other day I received in the mail a uranium ore sample from United Nuclear, with a radiation measurement of 2,500cpm, intending to use it as a particle source for my replication of the famous Gold-Foil experiment, the theory for which was devised by Ernest...

Homework Statement It is desired to study the low-lying excited states of 35Cl (1.219, 1.763, 2.646, 2.694, 3.003, 3.163 MeV) through the 32S (alpha,proton) reaction. a) With incident alpha particles of 5.000 MeV, which of these excited states can be reached? b) Again with 5.000 MeV incident...

If I adopt a level of significance of 5% for data which is normally distributed, and I am adopting a two-tailed test, then I see no reason to mess with standardizing my data and looking at the probability tables, but rather to simply reject anything outside of two standard deviations away from...

Ok, so I am currently building a cloud chamber for a major presentation in the area of Thermodynamics (or Energy and Temperature) and I've been thinking quite a bit about this theory...and i could be wrong...so don't tell me off about it... So the general physics of a cloud chamber, Isopropyl...

i have been asked in my lab report to calculate alpha in a bjt common emmitter circuit using 2 different formulas and explain why one is misleading.β=Ic/Ib= 537.1*10^-6/6.743*10^-6≈85 α= Ic/Ie=573.1*10^-6/566.357*^-6≈1.011 α=β/β +1≈0.988 i have worked out the two values of alpha where our beta...

Homework Statement Calculate the Kα and Kβ wavelengths for He and Li Ive seen https://www.physicsforums.com/showthread.php?t=118050 and the two websites that were given for tables, but I need to show calculations. Homework Equations K alpha Energy=10.2eV*(Z-1)2? E=hc/λ The...

What would happen if one were to fire electrons at a solid mass of alpha particles?

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...

From here: http://blogs.discovermagazine.com/badastronomy/2012/10/16/alpha-centauri-has-a-planet/

Hello, why alpha particles are better at ionizing gases than beta particles ? shouldn't the negative particles repel more electrons ? thanks

\begin{align} \alpha_nb^n +\beta_nb^{-n}=A_n\\ \alpha_na^n +\beta_na^{-n}=C_n \end{align} How does one go from that to $$ \alpha_n = \frac{A_n/a_n - C_n/b^n}{(b/a)^n-(a/b)^n} $$ and $$ \beta_n = \frac{a^nC_n - b^nA_n}{(b/a)^n-(a/b)^n} $$

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...

Homework Statement Radium 226 usually decays via three consecutive alpha decays into Pb 214. Show that energetically possibly for radium 226 to decay into 214|86 Pb and 12|6 C but tell why it is highly unlikely. Calculate the lifetime of the direct transition as a function of the possibility...

Why is $\alpha$ mentioned? I don't see an $\alpha$.With proper non-dimensionalization and assuming for convenience that the ratio of convection and conduction parameters $h/k = 1$, the cooling process is described by the following equations: \begin{alignat*}{4} T_t & = & T_{xx} & \\ T_x(0,t) &...

Hello everyone, Ok my textbook says inhibition of transmitter release, vasoconstriction and more things. Now my question is what does inhibition of transmitter release mean. Since alpha 1 receptor is present on post synaptic membrane, and alpha 2 is present in pre synaptic membrane, does this...

Can someone please tell me how I can plot the magnitude and phase response of this transfer function on wolfram alpha as I don't have Matlab: H(s) = -(2.1953*10^12)/(66600*((j*ω)^2)+808823539.4*(j*ω)+2.1626*10^12) A link to the output would be very useful also, thanks heaps.

I have some basic doubts in the alpha ray scattering experiment by Rutherford and his students way back in 1909. 1.In the formula for the distance of the closest approach, the term velocity of the alpha particle and the charge of the gold nucleus appears. How did they measure the velocity of...

Am I going to absorb 4 years of light data from Alpha Centauri or is it just going massively blueshift?

I have had a great deal of trouble finding sources that are specific as to how exactly radiation damages the body, it usually just says what damage radiation causes but not how it causes it, so I have compiled what I have found and I want to know if it is accurate and to fill in sequence of...

Do you guys think it is worth paying the extra money and upgrading to Wolfram Alpha pro?

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 Looks very simple, but I need help. I have a 2D vector, v, and I need to calculate a vector which forms an angle \alpha with it. Thank you very much Homework Equations I think that the equations should be, for 2 given vector u and v: thanks

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??