Coulomb explosion of K-shell ionized krypton clusters studied by multiple-ion coincidence momentum imaging.
Coulomb explosion of K-shell ionized krypton clusters studied by multiple-ion coincidence momentum imaging.
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通过多离子符合动量成像研究 K 壳层电离氪簇的库仑爆炸。
DOI：
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发表时间：
2007
影响因子：
4.4
通讯作者：
Makoto Yao
中科院分区：
文献类型：
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作者：
H. Iwayama;K. Nagaya;H. Murakami;Y. Ohmasa;Makoto Yao
用电子-多离子重合测量方法研究了平均粒径N为160的k壳电离氪团簇的库仑爆炸，其中离子的飞行时间（TOF）由位置敏感探测器测量。通过对符合离子信号数目Ncoin的TOF谱进行分类，发现在Ncoin>或=2时，以Kr+、Kr2+、Kr3+等单电荷碎片离子为主，而在Ncoin=1时，则以多重电荷离子为主。TOF光谱峰宽的Ncoin依赖性表明，随着Ncoin的增加，Kr+离子的平均动量增大，而Kr2+和Kr3+离子的平均动量减小。动量成像测量更直接地证实了这些结果。作者提出，较重的离子产生在团簇的中心部分，由于更高的对称性，来自周围离子的库仑相互作用更有效地抵消了。
The Coulomb explosion of K-shell ionized krypton clusters with an average size N of 160 has been studied by electron-multiple-ion-coincidence measurements in which the time-of-flight (TOF) of ions was measured by using a position sensitive detector. The authors have sorted the TOF spectra by the number of coincidence ion signals, Ncoin, and found that singly charged fragment ions such as Kr+, Kr2+, and Kr3+ are dominant for Ncoin>or=2, and that multiply charged ions are detected mainly for Ncoin=1. The Ncoin dependence of the peak widths in the TOF spectra reveals that the average momentum of the Kr+ ions increases with Ncoin, while those of Kr2+ and Kr3+ decrease. These results have been more directly confirmed by the momentum imaging measurements. The authors propose that the heavier ions are produced in the central part of clusters where the Coulomb interactions from the surrounding ions are more effectively canceled out due to the higher symmetry.
影响因子：
8.6
作者：
Marburger, S;Kugeler, O;Möller, T
通讯作者：
Möller, T