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Molecular ion emission from single large cluster impacts

机译:单个大簇撞击产生的分子离子发射

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We investigated the emission of the secondary ions stimulated by single impacts of 136 keV Au-400(4+) projectiles. The study was carried out on targets of glycine, phenylalanine, and C-60. In addition, a target of C-60 was examined with 18 keV C-60(+) projectiles. The experiments were performed in the event-by-event bombardment/detection mode. The secondary ions were identified with linear time-of-flight mass spectrometer equipped with an 8-anode detector. The Au-400(4+) projectile induces abundant multi-ion emission, for instance the average number of detected ions (atomic, fragment, molecular and cluster ions) emitted per event from glycine target is 12.5. The glycine intact molecular ion (Gly(-)) yield is 1.14. The bombardment of a C-60 target results in the efficient emission of multiple intact C-60(-) (total yield is 0.15). (c) 2006 Elsevier B.V. All rights reserved.
机译:我们研究了由136 keV Au-400(4+)弹丸的单次撞击所激发的二次离子的发射。该研究是针对甘氨酸,苯丙氨酸和C-60的目标进行的。此外,用18 keV C-60(+)射弹检查了C-60的目标。实验是在逐事件轰击/检测模式下进行的。次级离子通过配备8阳极检测器的线性飞行时间质谱仪进行鉴定。 Au-400(4+)弹丸可诱导大量的多离子发射,例如,每次事件从甘氨酸靶标发出的检测到的离子(原子,碎片,分子和簇离子)的平均数为12.5。甘氨酸完整分子离子(Gly(-))的产率为1.14。轰击C-60目标可有效发射多个完整的C-60(-)(总产率为0.15)。 (c)2006 Elsevier B.V.保留所有权利。

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