Calculating Neutrino Energy in PPI Chain

In summary, the conversation discusses how to calculate the percentage of energy carried away by neutrinos in a PPI chain. It is mentioned that the production of neutrinos in PPI is a three body reaction, and standard kinematics can be used to determine the spectrum of energies. The results can be compared to a solar model, but calculating the fluxes of the neutrinos is more challenging.
  • #1
Billg4444
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0
How would i go about working out the percentage of energy carried away by neutrinos in a PPI chain?
 
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  • #2
Thanks for the post! Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
 
  • #3
So, out of PPI, you'll find that the neutrinos will have a spectrum of energies, since their production is a three body reaction. You'll just need to do some pretty standard kinematics to find out what that spectrum should be - you know the masses of the entrance and exit channel, and you can find a range of appropriate kinetic energies for the entrance channel. The rest is energy/momentum conservation.

You can compare your results to Fig. 2 of Bahchall, Serenelli, Basu (2005), which shows the solar neutrino energy spectrum for a pretty good solar model. Calculating the fluxes of those neutrinos is another few orders of magnitude in difficulty. ;)
 

Related to Calculating Neutrino Energy in PPI Chain

1. What is a PPI chain?

A PPI (proton-proton) chain is a sequence of nuclear reactions that occur in the cores of stars, specifically the Sun, to produce energy. These reactions involve the fusion of protons to form helium and release energy in the form of photons and neutrinos.

2. How are neutrinos involved in the PPI chain?

Neutrinos are produced in the first step of the PPI chain, where two protons fuse to form a deuterium nucleus (a proton and neutron). This process also produces a positron and a neutrino. Neutrinos are also produced in the later steps of the PPI chain as more nuclear reactions occur.

3. How is neutrino energy calculated in the PPI chain?

The energy of a neutrino in the PPI chain can be calculated using the formula E = mc², where E is the energy, m is the mass, and c is the speed of light. The mass of a neutrino is very small, so its energy is also very small in comparison to other particles involved in the PPI chain.

4. How does knowing the energy of neutrinos in the PPI chain help in understanding the Sun?

The energy of neutrinos in the PPI chain is important for understanding the processes happening in the core of the Sun. By studying the energy of neutrinos, scientists can gain insight into the temperature and density of the Sun's core, as well as the rate of nuclear reactions occurring.

5. Can neutrino energy in the PPI chain be measured directly?

Yes, neutrino energy in the PPI chain can be measured directly using specialized detectors. These detectors are designed to detect the very small amount of energy that neutrinos carry and can provide valuable information about the Sun's core and the processes happening within it.

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