Beta Definition and 403 Threads

Beta (UK: , US: ; uppercase Β, lowercase β, or cursive ϐ; Ancient Greek: βῆτα, romanized: bē̂ta or Greek: βήτα, romanized: víta) is the second letter of the Greek alphabet. In the system of Greek numerals it has a value of 2. In Ancient Greek, beta represented the voiced bilabial plosive /b/. In Modern Greek, it represents the voiced labiodental fricative /v/ (while /b/ in foreign words is instead commonly transcribed as μπ). Letters that arose from beta include the Roman letter ⟨B⟩ and the Cyrillic letters ⟨Б⟩ and ⟨В⟩.

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  1. R

    Nuclear Simulation- Beta Decay ?

    Nuclear Simulation- Beta Decay ?? Hi, I'm a high school sophomore, I'm having trouble finding a suitable trigger for beta decay in my nuclear simulation (for fun) :confused: :cry: :confused: . I have the strong force and electromagnetic forces all set but I've run into the problem of atoms...
  2. J

    Rutherford's Gold Leaf experiment with Beta Radiation

    Rutherford's "Gold Leaf" experiment with Beta Radiation The other day at school I was doing about Rutherford's gold leaf experiment which proved the structure of atoms. In the experiment alpha radiation was fired at a thin piece of gold, resulting in most of the radiation simply passing through...
  3. D

    Unbelievable Half-Life of Zn-64: Investigating Cu-64 Beta Decay

    In the 16th edition of the chart of nuclides, it lists Cu-64 as decaying to Zn-64 by beta minus decay. OK, no problem here. Then it lists Zn-64 decaying back to Cu-64 by positron decay with a half life of 1.1 x 10^19 years. Assuming this isn't some typo, I have 2 questions. 1) How in blazes did...
  4. T

    LaTeX Latex Extension (Beta): Firefox Only

    LaTeX extension (beta) http://www.mathphyswiki.com/index.php?title=Latex_extension Firefox only, sorry. It's supposed to help with doing latex. Some issues left. It crashes sometimes. I'm taking suggestions on anything, from adding a function to a UI overhaul. I haven't even settled on a...
  5. P

    Beta Decay: Puzzling Creation of Antimatter

    In beta decay, an antibuetrino or an positron is emitted from the nucleus. how is this possible? how can antimatter come directly from matter? This is pizzling...:confused:
  6. 3

    Beta Rad & Positron/Electron - Radioactive Decay

    During radioactive decay, what determines if the emission of a beta particle will be positronic or electronic?
  7. T

    Beta decay and electron capture.

    Recently the radation physics class I am taking reviewed decay and I wondered how beta minus decay and electron capture can both emit neutrinos. I tried asking my professor, but I do not think I explained my question well enough to him. To explain my mindset, imagine you have only one...
  8. Q

    Beta Decay Proton: Ion Formation?

    if beta decay is the result of ejection of electron from the decay of a neutron into a proton and electron does that mean the the resultant product nucleus would be an ion since it would hav an extra proton? and same thing when a positron is formed from decay of proton?
  9. ?

    Generating Electricity from Beta Particles

    I was going to post this in the nuclear engineering forum but my question is really more electrical. A beta emiter is a radioactive substance which radiates electrons (beta particles) in all directions. My question is, is there a way to generate electricity from electrons traveling away...
  10. C

    Software for calculating beta decay

    Does anyone have a link or pointer to preferably freely available software with which I can calculate the energy spectrum of the electrons or positrons liberated in regular beta or beta+ - decay for a given isotope? My background is not in physics (chemical engineering, rather), and although I...
  11. P

    Teaching the Penetrating Powers of Radiation: Alpha, Beta, and Gamma

    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...
  12. P

    Exploring the Properties of \Sigma: \beta, x, y, z

    Let \Sigma = { \beta,x,y,z} where \beta denotes a blank, so x\beta \neq x, \beta \beta \neq \beta, and x\betay \neq xy but x \lambday = xy. Compute each of the following: 1: \parallel \lambda \parallel 2: \parallel \lambda \lambda \parallel 3: \parallel \beta \parallel 4...
  13. D

    Nuclear Decay: Pure Beta vs. Mixed Beta/Gamma Emitters

    This may be better suited for the nuclear engineering forum, so feel free to move it. In decay processes that involve beta decay (or positron decay), there are pure beta emitters and mixed beta/gamma emitters. What determines whether a specific nuclide is just a pure emitter as opposed to a mixed?
  14. W

    What was the role of the beta function in Veneziano's discovery?

    I watched the elegant universe and one scienetist noticed the euler beta function seemed to explain what he was doing and it had properties of a vibrating string. So I'm wondering if I could find his original paper, explanation or some additional info.
  15. M

    Beta Amino Acids: Definition & Examples

    What is a beta amino acid and how would a beta amino acid look like? I know that the beta carbon is the second carbon from the functional group but which group would be where? Can I have an example of a beta amino acid?
  16. V

    How Could You Distinguish Between an Alpha and a Beta Particle?

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

    Finding the beta risk from the alpha risk

    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...
  18. P

    What Causes Beta Decay to Be More Common in Heavy Elements?

    Hey i was just wondering if anyone could help me out and shed some light into " why is B^- decay (emission of an electron) far more common among the heavy elements than the B^+ (emission of a positron) or electron capture decays?" I am looking at a plot of Z vs. N for various nuclei and believe...
  19. R

    I have a question about Beta Decay

    In Beta radioactive decay, how do quarks rearrange themselves in these situations? Do they do this? ß+ : 1p (2u, 1d) + energy ==> 1n (2d, 1u) + 1e- ß- : 1n (2d, 1u) ==> 1p (2u, 1d) + 1e- + energy I believe I have these right. Positive Beta decay is "endothermic" while negative...
  20. E

    Neutrino detection by inverse beta decay

    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...
  21. P

    Projectile Physics Simplified: Solving for $\frac{1-sin \beta}{cos^2 \beta}$

    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..
  22. E

    Beta decay - derive an expression relating source angle to energy

    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...
  23. C

    Why is alpha helical membrane channels better suited than beta barrell channels?

    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...
  24. K

    Prove by Beta and Sigma limit definition

    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
  25. dduardo

    What Are the Expected Release Dates for Windows Vista Beta 1?

    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
  26. L

    QFTs & Epsilons: Unraveling Beta Functions in Dim Reg

    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...
  27. JamesU

    C/C++ Visual C++ 2005 Express Edition beta 2

    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?
  28. X

    Atomic Number Change in Fermium-252 After Beta Decay

    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.
  29. exequor

    Investigating Beta Particle Backscatter from Foil Materials

    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...
  30. S

    Beta Decay Questions: Help Understanding Angular Momentum

    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...
  31. S

    Understanding Beta Decay: How It Affects Atoms and Ionization

    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...
  32. O

    Brain Signals & Frequencies: Is Beta Wave Real?

    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?
  33. T

    Leptons produced during beta decay

    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...
  34. C

    How Does Beta Carotene Convert to Vitamin A?

    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...
  35. T

    Which angle is bigger: alpha or beta

    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?
  36. S

    Prove Beta is an isomorphism of groups

    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...
  37. M

    Beta Decay & Charge: Exploring the Nuclide

    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...
  38. T

    Was the Halo 2 Beta Version Ever Leaked?

    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...
  39. M

    Solving the Charge Conundrum in Negative Beta Decay

    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...
  40. R

    How do W particles and beta decay relate to muons?

    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...
  41. J

    Why is beta decay suppressed in a free neutron?

    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...
  42. arivero

    Beta+ Decay in Z>N Nuclei: Pauli Term Explanation

    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...
  43. A

    Explaining Alpha Beta & Gamma - Can Someone Help?

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

    What is the W- boson in beta decay?

    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?
  45. E

    Calculation of Callan-Symanzik Beta function of QED/QCD to one loop order

    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...
  46. Saint

    Is Linux Mandrake 10.0 Beta 2 Worth Installing on Your Notebook?

    I downloaded it from website the three iso files and rip them onto 3 separate CDRs. And installed the OS in my notebook, it is great, very nice desktop appearance.
  47. R

    Beta Decay of Strontium: Yttrium Ionisation?

    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?
  48. R

    Calculating Kinetic Energy & Speed of a Particle in Beta Decay Reaction

    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...
  49. S

    Why does Proton not escape during Beta Emission?

    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...
  50. arivero

    Beta or positron induced reactions?

    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...
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