Recent content by Salman2

  1. S

    I think I just became a QBist ?

    For balance, Chris Fields offer a critique of the QBism model presented by Fuchs based on the "measured" quantum reality of the wavefunction for the agent (the observer): http://arxiv.org/pdf/1108.2024v2.pdf At the end of the paper is this comment by Fields about QBism: "QBism provides...
  2. S

    Question Regarding Dawkins' The Blind Watchmaker

    Here is another mention of the process...a host species maintains a complete copy of a parasite genome: http://www.rochester.edu/news/show.php?id=2963
  3. S

    Positron cross section with H,D,T

    Ok, very helpful, thank you. I have a few more questions. Your estimate in binding energy between H and D has a delta of 0.005 eV, so does that mean there would be a similar delta between D and T predicted, that is, we would predict the binding energy for a T+e in ground state to be...
  4. S

    Positron cross section with H,D,T

    OK, thanks, we can forget about any shielding effect. So, are you saying that, due to the 'isotope effect' you mention, the positronium formation cross section potential would be highest for H(e-) isotope, and lowest for tritium T(e-) isotope, because the electron energy density would be a...
  5. S

    Positron cross section with H,D,T

    I have a question about cross section probability for a positron (e+) to interact with the electron (e-) that would be bound to three different atomic systems (1) hydrogen atom: H(e-), (2) deuterium atom: D(e-), (3) tritium atom: T(e-). My hypothesis is that a positron (e+) would have the...
  6. S

    Difference in thermal n cross section for Be-9 and B-10

    But, this requires a {ppnn} alpha cluster in ground state 1s shell, with pp/n_ (_=unfilled energy hole) in 2p. So, using a collective model approach, the 2p shell takes the form of cluster {ppn}, and this as He-3 has a cross section of 5,333 b...and this is not close to the experimental range...
  7. S

    Difference in thermal n cross section for Be-9 and B-10

    Yes, I have sent you an off forum message with email contact information. I realize any further discussion most likely would violate forum rules, so it may be better I discuss my thoughts with anyone that has an interest in the topic via private email. Perhaps further discussion on this...
  8. S

    Difference in thermal n cross section for Be-9 and B-10

    Thanks for link and comments. You are of course correct, my link is not valid for thermal n cross section reaction, I did not pick up on the energy of the incoming n. The cross section for Be-7 is very high for a light isotope. I don't know how the shell model explains it, but let me give...
  9. S

    Difference in thermal n cross section for Be-9 and B-10

    Thanks for reply. I'm looking at the isotopes you suggest, and I have a question about Be-7. This paper puts the n cross section for the Be-7 (n,p)Li-7 reaction as being 18 (+-4) barns. ? http://link.springer.com/article/10.1007%2FBF01284487 Do you have another reaction in mind that gives...
  10. S

    Van der Waals radius of hydrogen deuteride

    Does anyone have a reference for experimental and/or estimated Van der Waals radius for the molecule hydrogen deuteride ? Symbolically, this would be a proton {(p)e-} + {(np)e-} deuterium. I would like to know how closely the two atoms can approach each other to maintain the stable state of a...
  11. S

    Wavefunction probability nodes within 2s electronic orbitals

    I have some questions based on the figures provided on this helpful educational link: http://chemed.chem.wisc.edu/chempaths/GenChem-Textbook/Orbitals-896.html == For discussion, let us work with two isotopes, He-3 (ppn) and Li-6 (pppnnn). Each (p+) would have an electron (e-) associated with...
  12. S

    What was the reaction for pion production during the observation of antiprotons?

    Suppose two moments A and B, and they are connected by arrow of space-time relative to both, A <----> B. Suppose a matter proton with positive energy moving in space-time, the diagram would be: A ---{p}---> B. Now, suppose an antimatter proton with negative energy, would not the diagram be...
  13. S

    What was the reaction for pion production during the observation of antiprotons?

    I mean what Gabrielse from CERN had to say about the spin related to the magnetic moment of the antiproton, as copy below from this link: www.physicsworld.com/cws/article/news/2013/apr/08/atrap-nails-down-the-antiprotons-magnetic-moment ""Nevertheless, the team found that the magnetic...
  14. S

    What was the reaction for pion production during the observation of antiprotons?

    For my clarification. Would it be correct that we know experimentally that the antimatter proton has opposite electric charge, AND opposite spin for magnetic moment (i.e., negative for both), compared to the matter proton ? Are there any other differences ? Edit: Of course one other...
  15. S

    Photo of Enrico Fermi includes math/physics I do not understand

    This link shows another picture of Fermi, younger in age, with same circle drawing on blackboard, but in this version the circle drawing also is associated with energy equations. http://photos.aip.org/history/Thumbnails/fermi_enrico_a16.jpg
Back
Top