Microwave spectroscopy of positronium atoms in free space
Microwave spectroscopy of positronium atoms in free space
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自由空间中正电子原子的微波光谱
DOI:
10.1103/physreva.107.042810
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发表时间:
2023
影响因子:
2.9
通讯作者:
Sheldon R
中科院分区:
文献类型:
--
作者:
Sheldon R
We report measurements of the positronium (Ps)interval in which atoms traveling in free space were irradiated with microwave radiation generated using a horn antenna. Previous measurements of this transition, performed using atoms in waveguides, exhibited asymmetric and shifted line shapes. In the free-space measurements we report here, much smaller line-shape asymmetry was observed, but with large frequency shifts that varied with the orientation of the horn antenna. Our observations are supported by line-shape simulations and demonstrate that variations in the microwave radiation field distribution can perturb measured line shapes and give rise to apparent frequency shifts without necessarily causing large asymmetries; this effect can explain previous measurements in which an apparent discrepancy with predictions from quantum electrodynamics was ob- served [L. Gurung, T. J. Babij, S. D. Hogan, and D. B. Cassidy, Phys. Rev. Lett. 125, 073002 (2020)0031-900710.1103/PhysRevLett.125.073002].
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DOI:
--
发表时间:
1999
期刊:
影响因子:
--
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DOI:
10.1088/1742-6596/1138/1/012005
发表时间:
2018
期刊:
Journal of Physics: Conference Series
影响因子:
--
作者:
Adkins, G S
通讯作者:
Adkins, G S
影响因子:
2.9
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DOI:
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1971
期刊:
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DOI:
10.1016/j.nima.2016.05.049
发表时间:
2016-08
影响因子:
1.4
作者:
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A. Alonso;B. Cooper;A. Deller;D. Cassidy