The dynamics of thermal radiation accompanying the condensation of tungsten nanoparticles in superfluid helium and vacuum was studied experimentally in the visible range. It was shown that during the first 100 μs the accompanying thermal energy of process in the case of superfluid helium is considerably higher than in vacuum at comparable temperatures after that it levels up. From a standpoint of the process’ kinetics it is demonstrated that the reasons for this are, on one hand, an increased condensation rate in superfluid helium (due to the concentration of nanoparticles in quantized vortices), and on the other hand, higher efficiency of heating of the condensation products in superfluid helium (due to the prevalence of processes involving particles of similar sizes).

中文翻译：

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超流氦真空中激光烧蚀凝聚过程的实验研究

在可见光范围内通过实验研究了伴随钨纳米粒子在超流氦和真空中凝聚的热辐射动力学。结果表明，在前 100 μs 期间，超流氦情况下的过程伴随热能远高于可比较温度下的真空，此后它会升高。从过程动力学的角度来看，已证明其原因一方面是超流氦中的冷凝速率增加（由于纳米粒子在量子化涡流中的浓度），另一方面是更高的效率加热超流氦中的冷凝产物（由于涉及相似尺寸颗粒的过程普遍存在）。