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arXiv 0907.1184physics.atom-ph
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反质子氦原子超精细结构中的碰撞诱导弛豫

Collision Induced Relaxations within the Antiprotonic Helium Hyperfine Structure

T. Pask, D. Barna, A. Dax, S. Friedreich, R. S. Hayano, M. Hori, D. Horvath, B. Juhasz, C. Malbrunot, O. Massiczek, N. Ono, A. Soter, E. Widmann

摘要:

我们首次测量了反质子氦的超精细(HF)能级之间的非弹性自旋交换碰撞速率。我们测量了(37,35)子态随时间的演化,得到了与最近理论计算定性一致的非弹性碰撞速率。我们评估这些结果,通过使用所获得的速率作为一个参数,在一个严格的模拟,然后我们比较到以前测量的数据。我们发现我们的测量稍微低估了碰撞率,因此得出结论,实际值很可能落在误差的上限,而不是下限。

英文摘要:

We report the first measurements of the inelastic spin exchange collision rate between the Hyperfine (HF) levels of antiprotonic helium. We measure the time dependent evolution of the (37, 35) substates to obtain an inelastic collision rate which qualitatively agrees with recent theoretical calculations. We evaluate these results by using the obtained rate as a parameter in a rigorous simulation which we then compare to to previously measured data. We find that our measurement slightly underestimates the collision rate and therefore conclude that the actual value most probably falls within the upper, rather than lower, limit of the error.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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