Primary and secondary nucleation of the transition between the A and B phases of superfluid 3He
Primary and secondary nucleation of the transition between the A and B phases of superfluid 3He
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DOI：
10.1103/physrevlett.85.4321
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发表时间：
2000-11-13
影响因子：
8.6
通讯作者：
Skyba, P
中科院分区：
文献类型：
--
作者：
Bartkowiak, M;Fisher, SN;Skyba, P
我们在非常低的温度下，在可控的环境中研究了超流He-3在磁场驱动下跨越A-B相变的成核作用。B --> A和A --> B二次成核似乎都受表面捕获的新相的口袋的存活所支配。我们发现，在B-AB附近的领域，初级A --> B成核不能触发电离或中子照射，即使在非常高的强度;在我们的细胞初级A --> B成核只能触发外部温和的机械冲击。
We have studied nucleation in superfluid He-3 across the A-B phase transition driven by a magnetic field, in a controllable environment at very low temperatures. Both B --> A and A --> B secondary nucleation appear to be governed by the survival of pockets of the new phase trapped at surfaces. We find that, at fields near B-AB, primary A --> B nucleation cannot be triggered by ionizing or neutron irradiation even at very high intensities; In our cell primary A --> B nucleation can only be triggered externally by mild mechanical shock.