Beta Definition and 384 Threads

Hi, I have the following question: Neutrinos can be detected by an inverse beta-decay. The probability for an interaction of a neutrino and a proton is 10^(-43). How large should be a detector filled with water in order to let interact one of 1 million neutrinos with a proton? What would be...

this had some projectile physics but the problem boils down to... show... \frac{1-sin \beta}{cos^2 \beta} = \frac{1}{1+sin \beta} no idea..

Hi guys, Need a spot of help as i can't seem to find where to go next :( Ok, so there is a source which emits beta particles (currently unknown whether they are positrons or electrons). It can move at an angle +/- 90 degrees to the GM tube. I need to find an expression for the energy of the...

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...

Please any help. Use the symbols \beta and \sigma definition of limit to prove that limit (x,y)\Longrightarrow(0,0)x+y/x\x^2+y\y^2=0

Screenshots can be found on microsoft's site: http://www.microsoft.com/presspass/presskits/windowsvista/default.mspx Here is the fact sheet: http://www.microsoft.com/presspass/newsroom/winxp/VistaBeta1FS.mspx

Question about epsilons that occur in calculating beta functions in QFTs w dim reg In deriving the beta function of, say, QED using dimensional regularization we get the relation (up to 1 loop) \beta[e] = - \frac{\epsilon}{2} e - e \frac{d ln[Z_{e}]}{d ln[\mu]} \quad (1) and Z_{e} = 1...

for anyone who owns or is familliar with 'visual C++ 2005 Express Edition beta 2' . I'm new to programming, and I don't understand how to compile. probably a stupid question, but can anyone tell me how?

Suppose that the fermium-252 nucleus could undergo a decay in which a (beta-) particle was produced. How would this affect the atomic number of the nucleus? Explain briefly. This looks pretty easy, but I think it's trying to trick you. Thank you for helping.

I am designing an experiment to investigate how the number of beta particles scattered backwards depends on the thickness of a foil and the proton number of the foil material. I have an idea of what I will do, i.e. I will have the beta particles fired at the foil and place a GM tube next to the...

Hello, I'm having a hard time understanding some aspects of beta decay and I wondered if someone could help. (Perhaps this post belongs in the homework forum, but i don't have a specific question to do as such.) I'm not being helped by the fact that my general understanding of angular...

When an atom experience beta decay, will the atom become ion? This is my deduction: 1.An atom will release an electron in beta decay. 2.The electron is replaced by the electon produced from the decay of neutron. 3.However, the proton number increase by one. It still need one more electron...

does the brain send out signals or frequencies. I believe i recall hearing about something like beta waves perhaps it was. Someone know of this?

i know I've asked this before and please delete it if i can't post it again, but i didnt get an answer last time and it seems to be to be a fundamental problem in my understanding. does string theory answer the question of how to leptons can be produced from one quark? if i undserstand string...

I am struggling with coming up with a balanced chemical equation for the reaction of beta carotene to vitamin A. Here is the original problem: Vitamin A, an essential human nutrient, is necessary for proper vision function among other things. A precursor of vitamin A, beta carotene, is...

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?

i can't grasp these concepts, 1-to-1 and onto have always annoyed me. here's 1 question, (i don't know how to post symbols so Beta ..) (C is Complex numbers) Let Beta:<C,+> -> <C,+> by Beta(a+bi)=a-bi (that is, the image is a +(-b)i). Prove Beta is an isomorphism of...

Okay, so one of my hall mates across the way asked this question about his Chemistry, and then I realized that I wasn't too sure why it was myself, so I figured I'd pass this on to you. Take the decay equation {}^{24}_{11}Na \rightarrow {}^{24}_{12}Mg + {}^0_{-1}\beta His question...

Whats the deal with halo 2 beta? I have heard random stories from just news about it being leaked to the actual beta version of halo 2 being leaked. If someone does know where one could find the beta version please email me or contact me somehow I am not sure if it would be appropriate...

There's a question which bugged me for quite a while. Say, in negative beta decay, in a tritium nucleus. 2 neutrons, 1 proton, 1 orbital electron. The neutron changes into a proton, by the exchanging of a W- particle which soon decays into a electron and an antineutrino. charge is conserved...

w particle and beta decay and muons How many w particles,at any instant in time, are there in one cubic metre of a mass of radioactive nuclei which undergo beta decay? And how fast do these w particles move on average? How many w particles are,at any instant in time, in the neighbourhood of...

A free neutron is said to have a half life of something around 15 minutes, or maybe it's 18 minutes, I can't remember exactly. This brings up a couple of questions. (1) How does the experimenter maintain a neutron in a free state? Presumably maintaining a high vacuum is one requirement, but...

I have just noticed that the nuclei with Z slightly greater than N have a peculiar pattern of b+ decay. Do someone know if this is justified from the Pauli Term of Weizsaecker formula? Just I hope I have not found another unknown phenomena :-) [EDITED:] The phenomena is more apparent...

i get what alpha is but i do not really get what betta and gamma is can someone please explain to me ? thanx

neutron => proton + W- => proton + electron + electron anti-neutrino What're the quarks composing W-? To convert a neutron to a proton, there would need to be the expulsion of a down anti-up pair. That would mean a tad bit of mass loss, how does this work?

Hi everybody. I was given a project to calculate Callan-Symanzik beta function of QED and QCD (with massless fermions) to one loop order. This problem is actually solved in Peskin, BUT without the needed rigor, plus with funny assumptions and also a few mistakes. I have tried for a long time...

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During beta decay (eg of strontium) a neutron becomes a proton and an electron. The electron then leaves the atom. The atom (yttrium) must then have one more proton than electron so does beta decay of strontium always leave IONISED yttrium?

How do i calulate the kinetic energy and speed of a particle released form a beta decay reaction? for example, if i have Na -> Mg + e (i can't type in the atomic masses and numbers) Would i subtract the mass of Mg from Na ? m=m_Na-m_Mg =23.990961u-23.985042 =0.005937u then multiply...

during a beta emmision in which a neutron brakes up into a proton and an electron the electron escapes as a beta partice but the proton doesn,t escape and remains with the nucleus why so![?] [?] Now this occurs because during this process the time taken is roughly 100 times the time taken for...

Looking at the table of isotopic masses table it seems that certain atoms, as 64Zn or 58Ni, could be able to capture an electron and then release a positron with an energy higher, in average, that the initial electron. On the other side, some nucleus are able to capture a positron and release...

How would you target and isolate a new particle when using beta particles against a alpha target (negative vs positive)? I know you would have to use a particle accelerator of somesort. I am interested in different particles that can be targeted using a particle accelerator.

can beta rays target alpha rays? like specific atoms etc.?

In relativity, when it comes to calculating the beta factor, what frame of reference are we supposed to use to measure the speed of the object ?