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Astronuc said:"In the fusion of light elements, the reactions involve a restructuring the nuclei, and in general the resulting energy is 'carried as kinetic energy'."
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There is indeed such a fundamental law.Sebastiaan said:This is what I feared, but perhaps there are some fundamental laws which limit or mitigate the energy released by Gamma rays in fusion reaction
Do note this answer contradicts what is mention here.
You can't violate energy or momentum conservation.Sebastiaan said:This is what I feared, but perhaps there are some fundamental laws which limit or mitigate the energy released by Gamma rays in fusion reaction
(Highlight by me) That is correct, and you found one of the exceptions. Most fusion reactions of light elements produce two (sometimes three) nuclei, and then typically the energy is carried away as kinetic energy. Fusion reactions that only produce one nucleus are rare, and in this case the energy is carried away by photons.Astronuc said:"In the fusion of light elements, the reactions involve a restructuring the nuclei, and in general the resulting energy is 'carried as kinetic energy'."
Actually, fusion reactions of light elements in which more than one nucleus is produced and energy is carried away as kinetic energy of nuclei are a minority.mfb said:(Highlight by me) That is correct, and you found one of the exceptions. Most fusion reactions of light elements produce two (sometimes three) nuclei, and then typically the energy is carried away as kinetic energy. Fusion reactions that only produce one nucleus are rare, and in this case the energy is carried away by photons.
But is not claiming to be:mfb said:A sample of 5 reactions of your choice is not an argument.
Check this list - all with two reaction products! What does this show? Nothing, because it is a biased list as well.
Actually, there are obvious reasons why most fusion reactions must be ones that produce one nucleus.Most fusion reactions of light elements
Many fusion reaction cannot proceed via weaker electromagnetic interaction either, and must happen via even weaker weak interaction. Like the simplest way to get 1 α particle out of 4 nuclei, in 3 steps all of which start with 2 particles:mfb said:Fusion reactions with more than two nuclei in the final state can happen via the strong interaction, while reactions with only one need the weaker electromagnetic interaction. That makes the first more likely, especially if both options are possible.
How much of the kinetic energy is caried by the positron and neutino?snorkack said:and 2 usually emit positron:
p+p→d+e++νe
Like in beta decay. Most of the energy goes to positron and neutrino, and is freely distributed between them. A small fraction goes to the recoil of the nucleus.Sebastiaan said:How much of the kinetic energy is caried by the positron and neutino?
Sebastiaan said:This remind me that whenever nature produces something cool there is a catch. So the only useful thing about this reaction is energenic positron and deuterium core which could be usefull for other fusion reactions.
Question, let's say the energenic positron anihilates when it comes into contact with an electron, what happens with it kenetic energy stored in positron from p-p fusion?, Will the energy leased by Gamma be 1MeV + 0.5 E p-p
Wait a second. Exactly what do you mean by "freely distributed between them", the electron-neutrino is much less massive than the positron (which is at least 500000 more massive). Wouldn't this mean it would carry almost all of the 0.42 MeV energy?snorkack said:Like in beta decay. Most of the energy goes to positron and neutrino, and is freely distributed between them. A small fraction goes to the recoil of the nucleus.
Sebastiaan said:Wait a second. Exactly what do you mean by "freely distributed between them", the electron-neutrino is much less massive than the positron (which is at least 500000 more massive). Wouldn't this mean it would carry almost all of the 0.42 MeV energy?
Am I right in guessing that while the distribution of electron and antineutrino energies is not symmetric, the distribution of electron and antineutrino momenta is?mfb said:The distribution is not symmetric due to the electron mass, but the possible kinetic energy for both (individually) goes from zero to nearly the total released energy minus the electron rest energy.
I see there is some probability distribution from which the peak is around 300 keV and it can go up to almost 420 keV. Does this also mean on average its energy is about 300 keV as well?mfb said:As this is smaller than the electron mass most of the energy goes into the neutrino (on average).
Here is a plot, the peak is somewhere around 300 keV.
To calculate the energy of gamma rays in fusion, you can use the equation E = hf, where E represents energy, h is Planck's constant, and f is the frequency of the gamma ray. Additionally, you can also use the equation E = mc^2, where E is energy, m is the mass of the gamma ray, and c is the speed of light.
The unit of measurement for energy in gamma rays is the electron volt (eV). This unit is commonly used in physics to measure the energy of particles and radiation.
The energy of gamma rays plays a crucial role in the fusion process. It provides the necessary energy to overcome the repulsive forces between positively charged nuclei and allows them to fuse together. The higher the energy of the gamma rays, the more likely the fusion process will be successful.
Yes, gamma rays can be produced in various ways, such as radioactive decay, nuclear reactions, and high-energy collisions. In fusion, gamma rays are produced as a byproduct of the fusion reaction between two nuclei.
The energy of gamma rays in a fusion reaction can be measured using a device called a gamma ray spectrometer. This instrument can detect and measure the energy of gamma rays emitted during the fusion process and provide valuable data for further analysis and research.