Projectile coherence effects in single ionization of helium
Projectile coherence effects in single ionization of helium
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DOI：
10.1088/0953-4075/45/21/211001
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发表时间：
2012-09
期刊：
影响因子：
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通讯作者：
X. Wang;K. Schneider;A. LaForge;A. Kelkar;M. Grieser;R. Moshammer;J. Ullrich;M. Schulz;D. Fischer
中科院分区：
文献类型：
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作者：
X. Wang;K. Schneider;A. LaForge;A. Kelkar;M. Grieser;R. Moshammer;J. Ullrich;M. Schulz;D. Fischer
我们测量了3MeV质子碰撞He电离的全微分截面。利用电子冷却技术，在实验储存环上制备了相干长度大于典型原子尺度的入射光束。观察到了由于射弹相干性而产生的显著效应，这在非相干的100 MeV u−1 C6 +射弹束中是不存在的，并且目前的数据与理论更好地一致。因此，这些结果代表了解决100 MeV u−1 C6 +情况下实验与理论之间迄今无法解释的差异的重大进展。
We have measured fully differential cross sections for ionization of He by 3 MeV proton impact. A projectile beam with a coherence length larger than typical atomic scales was prepared at the Test Storage Ring taking advantage of electron cooling. Pronounced effects due to the projectile coherence are observed which are absent for an incoherent 100 MeV u−1 C6 + projectile beam and the present data are in much better agreement with theory. Thus, these results represent a major advancement in resolving the so far unexplained discrepancies between experiment and theory for the 100 MeV u−1 C6 + case.