I suspect that there is a nuclear physics book that lists the energy of gamma radiation from C + n. But my Google skills have not produced it.
http://www.nndc.bnl.gov/useroutput/AR_255_4.html
I suspect that there is a nuclear physics book that lists the energy of gamma radiation from C + n. But my Google skills have not produced it.
There's nothing "missing" from the spectrum RC, it's all there. There are even bumps in C and O that are quite obvious in the data. The 7+ MEV ranges are simply at the end of the scale so its not as easy to discern the "bump", but that wavelength is definitely present in the spectrum! Nothing is "missing".
12C(p,gamma)13C?
As I and ihe other posters have already pointed out:There's nothing "missing" from the spectrum RC, it's all there. There are even bumps in C and O that are quite obvious in the data. The 7+ MEV ranges are simply at the end of the scale so its not as easy to discern the "bump", but that wavelength is definitely present in the spectrum! Nothing is "missing".
By reading the wrong part of the paper and making a mistake. The bumps in figure 5a are due to neutron capture reactions, as stated in section 2 ("Results")How did you decide that Tim?The bumps labeled "C" and "O" are due to the relaxation of the nuclei from an excited state to the ground state and have nothing at all to do with fusion.
I was looking at the text that actually refers to figure 6 and deals with specific isotopes. That is de-excitation energy. In any case, none of the features on these plots is consistent with gamma rays produced via a CNO fusion cycle.Arkhangelskaja said:Spectra of several flares observed by AVS-F apparatus contain nuclear, annihilation or (and) neutron capture lines (see Fig. 5a).
No I did not. What, you can't even read simple English? You think you are going to fool someone with such an outrageous claim?Yes, Tim, that is the point. You claimed they weren't there "at all".
FYI RC, Tim said that those wavelengths were not present "at all". They are however clearly present in the spectrum.That's what I said and nothing in the figure 5a you refer to motivates me to change my mind. There is nothing in that plot that is the slightest bit suggestive even of the possibility of CNO fusion anywhere near the "surface" of the Sun.... Furthermore, the gamma rays emitted by CNO reactions are in fact not seen in the Sun at all. ... But the real bottom line is that we know (we don't "guess" and don't "think", we know) that fusion does not happen in the atmosphere of the Sun. This is because we know that fusion reactions will generate gamma rays with extremely predictable energies and we know by virtue of direct observation that those gamma rays are not emitted by the Sun.
As anyone can plainly see, I never said that the "wavelengths" are not present at all.
There are in fact all the gamma rays from CNO fusion present in the spectrum.
That is certainly how you made is sound, or more correctly how *I* interpreted it. There are in fact all the gamma rays from CNO fusion present in the spectrum. You can argue that those particular wavelengths are not related to CNO fusion, but all the relevant CNO fusion wavelengths are present in the spectrum.
Aside from the "he said/she said" debate, do you still think that the spectrum shown in the paper that you linked supports the position that significant CNO fusion is happening in the corona?
Where?
Define "significant". IMO it's a "rare" event that occurs only the "most extreme" discharge events, it's short lived and ends as soon as the discharge ends. Define "significant" in terms of a "totaled" spectrum like that. I would almost need to see a time elapsed breakdown, millisecond by millisecond breakdown of the spectrum to give you a decently quantified number, but compared to the sun's total energy output, it's "insignificant" IMO.
So any CNO-fusion spike would be down in the noise?
No, it would simply be "averaged/totaled" in that specific graph. Presumably it might spike quite nicely in a millisecond by millisecond recording of the event in gamma. In a 'binned" sort of graph like that it's not going to necessarily stick out like a sore thumb IMO.
No, it would simply be "averaged/totaled" in that specific graph. Presumably it might spike quite nicely in a millisecond by millisecond recording of the event in gamma. In a 'binned" sort of graph like that it's not going to necessarily stick out like a sore thumb IMO.
No there aren't.There are in fact all the gamma rays from CNO fusion present in the spectrum.
Right, so the wavelengths at which we should see the fusion peaks are included and we don't see the fusion peaks. And the fact that we don't saee the fusion peaks that we should see if fusion is taking place is evidence that fusion is taking place. One of the oddest arguments you have ever made.You can argue that those particular wavelengths are not related to CNO fusion, but all the relevant CNO fusion wavelengths are present in the spectrum.
We already new carbon and oxygen was present in the Sun. I'm pretty sure we have done for at least a century.Those "bumps" also clearly demonstrate that presence of carbon and oxygen,
It demonstrates nothing of the sort. Free neutrons can easily be produced by cosmic ray spallation. Then there is probably e-+ p -> nue + n from cosmic rays too.they also demonstrate that "Bennett Pinches" are involved in that neutron capture process, since that is the one process known to release free neutrons in light plasma.
Then there is probably e-+ p -> nue + n from cosmic rays too.
Not likely; this is a weak interaction process with an incredibly low cross section.
What are the "appropriate wavelengths " of the graph?At the appropriate wavelengths of the graph I cited.
I'm aware it is a weak interaction. But above ~1011 eV the weak force has a similar strength to the EM force. Given that cosmic rays go up to 1020 eV I was kind of thinking this cross section might get quite big. Though I haven't thought about it that much and I guess the centre of mass energies must be lower than this.
By the time you get to ultra-high-energy cosmic rays, the reaction you're looking at is probably not e + p -> n + nu; it's e + p --> e + (huge hadronic shower) + nu.
CNO fusion gives off very specific wavelengths of energy, Michael.
This signature is not present in the corona.
Wavelength signatures are present in C and O, but not at the energies required.
This is very basic freshmen-level science. Note that this sequence gives off a different signature than the Proton-Proton fusion sequence. I suggest you read a book on nuclear physics.
Fair point. That could include neutrons though?
Ya, and each one of them appears in the histogram too.
NO, not one of them appears in the histogram. There is a continuum which could come from:Ya, and each one of them appears in the histogram too.
And there are no peaks at those "appropriate" wavelengths therefore no evidence of CNO fusion.All the appropriate wavelengths generated by CNO fusion are represented in the graph.
Wuh? RC has given you the appropriate energies multiple times.What exactly would be the "energies required" considering the fact that not every flare necessarily leads to CNO fusion?
There are no peaks at those energies only continuum. Possible sources of the contiuum are actual continuum radiation such as Brehmsstrahlung or partial absorption of the energy of incoming photons.I suggest you start by explaining why you feel the wavelengths in questions and that were actually observe were *NOT* due to CNO fusion, because those wavelengths certainly exist in the data.
Could and usually would. But no more so than a similar primary event mediated by the strong or EM forces, and lacking the prompt hard neutrino.
Your interpretation is sloppy & careless. You need to pay more attention. Everybody else knew exactly what I meant, only you managed to decide that what I actually meant refers to words I did not use. Your second sentence here is the perfect case in point: "There are in fact all the gamma rays from CNO fusion present in the spectrum". What you mean to say is apparently synonymous with this: "there are gamma rays present in the spectrum at the same wavelengths as are emitted by CNO fusion." What you actually did say is synonymous with this: "Some of the gamma rays in that spectrum were created by CNO fusion". If you really think that CNO fusion is generating some of the recorded gamma rays, then by all means show us some evidence. Otherwise, you should take care that the words you use are coincident with what you mean.That is certainly how you made is sound, or more correctly how *I* interpreted it. There are in fact all the gamma rays from CNO fusion present in the spectrum.As anyone can plainly see, I never said that the "wavelengths" are not present at all.
That is of course a totally ridiculous thing to say. No, as a matter of fact, by no stretch of the imagination is a Bennett Pinch (or a "Bennett Pinch", depending on the significance of the " " marks) the only way to generate free neutrons in any plasma. As a matter of fact, most of the free neutrons are "freed" from deuterons in the plasma, where the protons, neutrons and deuterons are in thermal equilibrium. This is indicated by the bump in the plot (figure 5a) marked "n", at 2.23 MeV, which is the deuteron binding energy. The strength of the feature is temperature dependent; the higher the temperature the slower the rate at which protons will capture free neutrons, while that rate increases towards lower temperatures, and then decreases again when temperatures are too low.Those "bumps" also clearly demonstrate that presence of carbon and oxygen, they also demonstrate that "Bennett Pinches" are involved in that neutron capture process, since that is the one process known to release free neutrons in light plasma.
You can argue that those particular wavelengths are not related to CNO fusion, but all the relevant CNO fusion wavelengths are present in the spectrum.
I do argue that none of the wavelengths seen are due to CNO fusion and assert that there is significant evidence in favor of this position. The bumps in figure 5a are superimposed on top of a sloping background that resembles figure 5b. That background is a thermal continuum. The bumps indicate "background + process", where the neutron capture gamma rays (they are the "process" part) are emitted in addition to the background gamma rays. If there is any CNO fusion process in play then there must be a bump for that process. Furthermore, the CNO process is a cycle, so you don't just get a bump here or a bump there, you get all of the bumps simultaneously or you get none of the bumps at all, there is no middle ground.I suggest you start by explaining why you feel the wavelengths in questions and that were actually observe were *NOT* due to CNO fusion, because those wavelengths certainly exist in the data.
I should be greatly surprised if Mozina accepts such advice. My standard reference for these discussions is Nuclear Physics of Stars by Christian Iliadis, Wiley-VCH, 2007. And D.D. Clayton's old standard Principles of Stellar Evolution and Nucleosynthesis is still in print I think, but now somewhat outdated in detail (1968 & 1983), although the basic nuclear physics has not changed.I suggest you read a book on nuclear physics.
Ya, and each one of them appears in the histogram too.
All the appropriate wavelengths generated by CNO fusion are represented in the graph.
What exactly would be the "energies required" considering the fact that not every flare necessarily leads to CNO fusion?
I suggest you start by explaining why you feel the wavelengths in questions and that were actually observe were *NOT* due to CNO fusion, because those wavelengths certainly exist in the data.
Since (some) of the electric sun models propose a continuous glow discharge happening on the suns surface what do people think that the likelihood of Inertial-Electrostatic Confinement Fusion happening on/in the sun is?
Since (some) of the electric sun models propose a continuous glow discharge happening on the suns surface what do people think that the likelihood of Inertial-Electrostatic Confinement Fusion happening on/in the sun is?
http://www.plasma-universe.com/Electric_glow_discharge#Fusion_in_Glow_Discharges
The key to understanding this paradox is that there are both positive and negative electric charges, whereas there are only positive gravitational "charges.'' This means that gravitational forces are always cumulative, whereas electrical forces can cancel one another out. Suppose, for the sake of argument, that the Universe starts out with randomly distributed electric charges. Initially, we expect electrical forces to completely dominate gravity. These forces try to make every positive charge get as far away as possible from the other positive charges, and as close as possible to the other negative charges. After a while, we expect the positive and negative charges to form close pairs.
Oxygen and Carbon appear, but not Nitrogen, and not even at the appropriate energy peaks.
As others have said, the required peaks would be at 1.95 MeV, 7.35 MeV, and 7.54 Mev.
The only one you could even consider remotely close is Mg+Ne+Si (1.51-1.74 MeV), C shows up at 4.0-5.0 MeV, and O shows up at 5.3-6.9 MeV. Note that none of these are even close to 1.95, 7.53, and 7.54 MeV.
So any CNO-fusion spike would be down in the noise?
Averaged/totaled? You are making things up. This plot is a simple histogram. A monoenergetic gamma ray source on the Sun would lead to a bump in the histogram; the only thing that can make the bump "invisible" is if there aren't many gammas at that energy to begin with. Note that the neutron-capture gammas are not "averaged/totaled" in a way that makes them invisible to nonbelievers.
But the fact that the wavelengths are present just shows that the detector can detect at the relevant energies. It does not give any support whatsoever for the possibility of CNO fusion since there are no peaks at the appropriate energies. In fact, the lack of any peaks shows there are no significant narrow line emissions at those energies, in direct contradiction to what one would see if there was CNO fusion.In this particularly histogram, probably so. The point of me pointing it out was more to show that the wavelengths are present and C and O are also present.
It does no such thing. It confirms there are free neutrons in the Sun. There are many ways free neutrons may have been produced.The neutron capture signature appears in "discharges" on Earth, so it also tends to confirm that discharge processes are occurring during flare events.
So the histogram doesn't show the presence of the relevant CNO peaks (in fact it shows they are completely absent) and doesn't show the existence of "discharges" (whatever you mean by that) since free neutrons can be produced in a number of ways. All it shows is that C and O are present. Which everybody knew already.I was *NOT* trying to suggest that fusion occurs in *every* flare, nor that a histogram of random flare events would show clear CNO spikes in exactly the same percentages for every element.
Your interpretation is sloppy & careless. You need to pay more attention. Everybody else knew exactly what I meant, only you managed to decide that what I actually meant refers to words I did not use. Your second sentence here is the perfect case in point: "There are in fact all the gamma rays from CNO fusion present in the spectrum". What you mean to say is apparently synonymous with this: "there are gamma rays present in the spectrum at the same wavelengths as are emitted by CNO fusion." What you actually did say is synonymous with this: "Some of the gamma rays in that spectrum were created by CNO fusion".
...And so I stand by my claim: These data do not indicate the presence of any CNO fusion cycle. Furthermore, these data do indicate that no CNO fusion cycle is in effect.
Because the count rate doesn't go to zero at the CNO energies? Wow. By that standard, there is no possible data (except flat-zero background) that you would not interpret as supporting your theory.