Abstract

The interaction between a deuterium ion (D⁺) beam and deuterium-enriched Pd and Ti targets are studied using the HELIS ion accelerator (Lebedev Physical Institute). The neutron yield is determined from the DD reaction in the deuterated Pd target whose surface is irradiated with a D⁺-ion beam with an energy of 20 keV. The neutron flux is measured in the D⁺-ion-beam direction as a function of the angle β of target rotation relative to the beam axis using a multichannel detector based on ³He counters. Significant anisotropy (orientation effect) of the neutron yield is observed; it is two times higher at β = 0° than at β = ±30°. The orientation effect can be associated with channeling and the so-called flux-peaking effect. It is studied by computer simulations using the BCM-2.0 code. The enhanced density of the D⁺ flux between the (200) planes of a Pd crystal (where implanted D is located) at zero angle of incidence with respect to these planes makes it possible to qualitatively explain the observed orientation effect. No effect is observed in a homogeneous target of deuterated titanium.

中文翻译：

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通量峰效应对氘化钯中D +离子通道化的DD反应产率的影响

摘要

使用HELIS离子加速器（列别捷夫物理研究所）研究了氘离子（D ⁺）束与富氘Pd和Ti靶之间的相互作用。中子产率由氘化的Pd靶材中的DD反应确定，该靶材的表面被能量为20 keV的D ⁺离子束辐照。使用基于³ He计数器的多通道检测器，在D ⁺离子束方向上测量中子通量，作为目标旋转相对于束轴的角度β的函数。观察到中子产率的显着各向异性（取向效应）；它在β = 0°时要比在β =时高两倍±30°。取向效应可以与沟道效应和所谓的通量峰效应相关。使用BCM-2.0代码通过计算机模拟对其进行研究。相对于这些平面，在零入射角下，Pd晶体（位于注入的D所在的位置）的（200）个平面之间的D ⁺通量的密度提高，从而可以定性地解释所观察到的取向效应。在氘化钛的均质靶中未观察到任何作用。