Simultaneous charge polarization and fragmentation of N2 molecules in slow keV collisions with Kr8+ ions
Simultaneous charge polarization and fragmentation of N2 molecules in slow keV collisions with Kr8+ ions
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N2 分子在与 Kr8 离子的慢 keV 碰撞中同时发生电荷极化和碎片
DOI：
10.1103/physreva.65.030702
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发表时间：
2002
影响因子：
2.9
通讯作者：
U. Saalmann
中科院分区：
文献类型：
--
作者：
M. Ehrich;U. Werner;H. Lutz;T. Kaneyasu;K. Ishii;K. Okuno;U. Saalmann
研究了入射能量为19 ~ 171 eV/u的Kr 8+离子与氮分子碰撞的库仑碎裂过程。在低碰撞能量（小于或接近50 eV/u）和小碰撞参数下，碎裂分子N-2（q+）离子的电子分布变得强极化。这是由于在碎裂过程中存在缓慢的高电荷射弹。微观计算同时将电子转移和分子解离给洞察这个新发现的极化效应的动力学。
Coulomb fragmentation processes in collisions of Kr8+ ions with nitrogen molecules were studied at projectile energies between 19 and 171 eV/u. At low impact energies (less than or similar to50 eV/u) and small impact parameters, the electron distribution of the fragmenting molecular N-2(q+) ion becomes strongly polarized. This is due to the presence of the slow highly charged projectile during the fragmentation process. Microscopic calculations simultaneously incorporating electron transfer and molecular dissociation give insight into the dynamics of this newly found polarization effect.