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  • Why is Helium-3 better than Deuterium for fusion energy production?
    While D-He3 fusion reaction rate peaks at smaller energies than D-D (see this picture), and produce more energy (18MeV for D-He3 vs 3-4MeV for D-D reaction), this is not the main reason why some people think He3 is a 'better' fuel The main reason is that D-He3 fusion fuel cycle is aneutronic That is, all fusion products (if we disregard
  • quantum mechanics - Why are He-4 nuclei considered bosons, and He-3 . . .
    1) He3 and He4 both have 2 electrons These electrons form spin singlet state 2) From the nuclear shell model, the two protons form singlet in '1s' shell, also for two neutrons Therefore, the nucleon of He4 is spin 0+0=0, which means boson 3) On the other hand, He3 has only one neutron, so only one neutron occupies 1s shell
  • Why is helium-3 stable? - Physics Stack Exchange
    Why is helium-3 stable? Besides hydrogen, helium-3 is the only isotope that has a neutron-to-proton ratio less than 1 Why is it not radioactive?
  • ヘリウム3の核融合の可能性 -ヘリウム3の核融合は放射能を出さ . . .
    ヘリウム3(He3)を用いる核融合は、基本的には重水素と融合させるHe3-D反応ですが、この反応自体からは中性子線が出ません。陽子線が発生しますが、これは磁場から逃げ出せないのですべて閉じ込めることができます。
  • How can you produce a spectrum with He3 thermal neutron detector?
    For instance with He3 thermal detector, the reaction is the following : He3 + n -> H1 + H3 + 764 keV H1 and H3 kinetic energies are both determined by conservation laws So in the case of a perfect detector, we should systematically measure a peak with eventually a small width coming from neutron energy (thermal few meV << 764 keV)
  • renormalization - Intuitive picture for spin-fluctuations contribution . . .
    In the equation $$ C_V = aT+ bT^3\ln T$$ the logarithmic term may be explained by paramagnons, i e fluctuations in which the adjacent atoms are demanded to be aligned
  • Tritium Decay and He-3, - Physics Stack Exchange
    Stack Exchange Network Stack Exchange network consists of 183 Q A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers
  • Helium 3 atoms as fermions? - Physics Stack Exchange
    If so, why shouldn't we worry about that proton is actually made of quarks there? I think it is the same idea that He3 atom as a whole can be considered as a single fermion, neglecting the internal structure Because the energy scale in the superfluid problem is too low to resolve the internal structure of He3 $\endgroup$ –
  • Why does deuterium fusing with a proton produce a gamma ray?
    Can anyone explain why this process $[\rm D + p \to He3 + \gamma]$ must result in production of a gamma ray? Noting that only one particle is produced the $^3_2\rm$ He nucleus will be in an excited stated as a result of the reaction A way that the $^3_2\rm$ He nucleus can move down towards the ground state is via the emission of gammas
  • quantum mechanics - Why do He-3 atoms repel each other much more . . .
    The last statement I would say is the mundane : "two electrons tied in tandem with other two repel more than one with one", and He3 has two electrons in orbitals Both try to explain why in the He3 Cooper pair we find the He3 in P waves and not in S waves





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