Laser-induced variable pulse-power TOF-MS and neutral time-of-flight studies of ultradense deuterium
Laser-induced variable pulse-power TOF-MS and neutral time-of-flight studies of ultradense deuterium
复制标题
超密氘的激光诱导可变脉冲功率 TOF-MS 和中性飞行时间研究
DOI：
10.1088/0031-8949/81/04/045601
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
L. Holmlid
中科院分区：
文献类型：
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作者：
S. Badiei;P. U. Andersson;L. Holmlid
采用激光诱导库仑爆炸的方法，方便地研究了超重原子氘材料D（−1）。Badiei et al （2009 Int.）首次报道了这种材料的高动能释放（KER）。j . Hydrog。能量34 487)和双探测器装置证明了Badiei et al . （2009 Int.）中的高KER和复杂的破碎模式。[j] .质谱学。2002 - 02。常见的KER为630±30 eV，对应于原子间距离D-D为2.3±0.1 pm。在离子和中性的飞行时间（TOF）测量中，两个相似的探测器在不同的飞行距离上证明了原子粒子的存在。现在报道了材料D（−1）的中性TOF光谱的新结果。结果表明，D（−1）的密度变化与普通致密D(1)的相似变化是耦合的，并提出这两种形式的致密氘是迅速相互转化的。详细研究了TOF-MS信号与激光强度的关系。快氘核强度在很大范围内与激光功率无关，这表明D（−1）是一种具有激发能或粒子远距离有效输运的超流体。
The ultradense atomic deuterium material named D(−1) is conveniently studied by laser-induced Coulomb explosion methods. A well-defined high kinetic energy release (KER) from this material was first reported in Badiei et al (2009 Int. J. Hydrog. Energy 34 487) and a two-detector setup was used to prove the high KER and the complex fragmentation patterns in Badiei et al (2009 Int. J. Mass Spectrom. 282 70). The common KER is 630 ±30 eV, which corresponds to an interatomic distance D–D of 2.3 ±0.1 pm. In both ion and neutral time-of-flight (TOF) measurement, two similar detectors at widely different flight distances prove that atomic particles are observed. New results on neutral TOF spectra are now reported for the material D(−1). It is shown that density changes of D(−1) are coupled to similar changes in ordinary dense D(1), and it is proposed that these two forms of dense deuterium are rapidly transformed into each other. The TOF-MS signal dependence on the intensity of the laser is studied in detail. The fast deuteron intensity is independent of the laser power over a large range, which suggests that D(−1) is a superfluid with long-range efficient transport of excitation energy or particles.