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首页> 外文期刊>Applied radiation and isotopes: including data, instrumentation and methods for use in agriculture, industry and medicine >Application of deuteron-deuteron (D-D) fusion neutrons to (40)Ar/(39)Ar geochronology.
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Application of deuteron-deuteron (D-D) fusion neutrons to (40)Ar/(39)Ar geochronology.

机译：氘核-氘核（D-D）聚变中子在（40）Ar /（39）Ar地球年代学中的应用。

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摘要

Neutron irradiation of samples for (40)Ar/(39)Ar dating in a (235)U fission reactor requires error-producing corrections for the argon isotopes created from Ca, K, and, to a lesser extent, Cl. The fission spectrum includes neutrons with energies above 2-3MeV, which are not optimal for the (39)K(n,p)(39)Ar reaction. These higher-energy neutrons are responsible for the largest recoil displacements, which may introduce age artifacts in the case of fine-grained samples. Both interference corrections and recoil displacements would be significantly reduced by irradiation with 2.45MeV neutrons, which are produced by the deuteron-deuteron (D-D) fusion reaction (2)H(d,n)(3)He. A new generation of D-D reactors should yield sufficiently high neutron fluxes (>10(12) ncm(-2)s(-1)) to be useful for (40)Ar/(39)Ar dating. Modeling indicates that irradiation with D-D neutrons would result in scientific benefits of improved accuracy and broader applicability to fine-grained materials. In addition, radiological safety would be improved, while both maintenance and operational costs would be reduced. Thus, development of high-flux D-D fusion reactors is a worthy goal for (40)Ar/(39)Ar geochronology.
机译：在（235）U裂变反应堆中对（40）Ar /（39）Ar定年的样品进行中子辐照需要对由Ca，K和较小程度的Cl产生的氩同位素进行误差校正。裂变谱包括能量高于2-3MeV的中子，这对于（39）K（n，p）（39）Ar反应不是最佳的。这些高能中子导致最大的后坐位移，在细颗粒样品的情况下，这可能会引入年龄伪影。通过用氘核-氘核（D-D）聚变反应（2）H（d，n）（3）He产生的2.45MeV中子辐照，可以显着减少干扰校正和后坐位移。新一代D-D反应堆应产生足够高的中子通量（> 10（12）ncm（-2）s（-1）），可用于（40）Ar /（39）Ar测年。建模表明，用D-D中子辐照将产生科学上的好处，即提高了精度，并广泛适用于细颗粒材料。此外，将提高放射安全性，同时减少维护和运行成本。因此，开发高通量D-D聚变反应堆是（40）Ar /（39）Ar地球年代学的一个有价值的目标。

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