On the enhancement of nuclear reaction rates in high-temperature plasma

Details On the enhancement of nuclear reaction rates in high-temperature plasma On the enhancement of nuclear reaction rates in high-temperature plasma

2006-07-13

arxiv.org/abs/physics/0607127v1

Phys.Lett.A359:663-668,2006

Physics

Plasma Physics

12 pages, 4 figures, to be published in Phys. Lett. A

Scientific paper

10.1016/j.physleta.2006.07.077

We argue that the Maxwellian approximation can essentially underestimate the rates of some nuclear reactions in hot plasma under conditions very close to thermal equilibrium. This phenomenon is demonstrated explicitly on the example of reactions in self-sustained DT fusion plasma with admixture of light elements X = Li, Be, C. A kinetic analysis shows that the reactivity enhancement results from non-Maxwellian knock-on perturbations of ion distributions caused by close collisions with energetic fusion products. It is found that although the fraction of the knock-on ions is small, these particles appreciably affect the D+X and T+X reaction rates. The phenomenon discussed is likely to have general nature and can play role in other laboratory and probably astrophysical plasma processes.

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