A simple and clean source of low-energy atomic carbon
A simple and clean source of low-energy atomic carbon
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DOI：
10.1063/1.4895806
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发表时间：
2014-09-15
影响因子：
4
通讯作者：
Huisken, F.
中科院分区：
文献类型：
--
作者：
Krasnokutski, S. A.;Huisken, F.
建立了一种通过热蒸发从密封的薄壁钽管中发射低能碳原子的碳源。管子由0.05毫米厚的钽箔制成，并填充了C-12或C-13碳粉。密封后，用直流电加热。溶剂化的碳原子扩散到钽管的外表面，当温度超过2200K时，观察到原子碳从钽管表面蒸发。由于蒸发的物质能量较低，它们非常适合通过拾取技术并入液氦液滴。结合物种的质量分析表明，原子碳占主导地位，而C-2和C-3分子的丰度很低(
A carbon source emitting low-energy carbon atoms from a thin-walled, sealed tantalum tube via thermal evaporation has been constructed. The tube is made from a 0.05 mm thick tantalum foil and filled with C-12 or C-13 carbon powder. After being sealed, it is heated by direct electric current. The solvated carbon atoms diffuse to the outer surface of the tube and, when the temperature rises over 2200 K, the evaporation of atomic carbon from the surface of the tantalum tube is observed. As the evaporated species have low energy they are well-suited for the incorporation into liquid helium droplets by the pick-up technique. Mass analysis of the incorporated species reveals the dominant presence of atomic carbon and very low abundances of C-2 and C-3 molecules (