Precision determination of the hyperfine-structure interval in the ground state of positronium. V
Precision determination of the hyperfine-structure interval in the ground state of positronium. V
复制标题
正电子素基态超精细结构区间的精确测定。
DOI：
10.1103/physreva.30.1331
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发表时间：
1977
影响因子：
2.9
通讯作者：
K. Woodle
中科院分区：
文献类型：
--
作者：
M. W. Ritter;P. Egan;V. Hughes;K. Woodle
用改进的微波磁共振装置重新测量了正电子偶素的塞曼跃迁，从而得到了基态精细结构间隔。delta nu..正电子素的含量已经得到了更高的精确度：delta nu.. = 203.384+-0.004 GHz（20 ppm）。以N/sub 2/气体进行测量，并给出值（1/. delta nu..）段落delta（.. delta nu..）/段落δ D =（-5.7+-1.4）× 10/sup-5/ atm/sup-1/ at 23/sup 0/C的精细结构密度偏移系数。考虑了对正电子素塞曼跃迁的相对论结合修正。（AIP）
With an improved microwave magnetic resonance apparatus the Zeeman transition in orthopositronium has been remeasured and, hence, the ground-state fine-structure interval ..delta nu.. in positronium has been determined with higher precision: ..delta nu.. = 203.384+-0.004 GHz (20 ppm). The measurements were made in N/sub 2/ gas and gave the value (1/..delta nu..) par. delta (..delta nu..)/par. deltaD = (-5.7+-1.4) x 10/sup -5/ atm/sup -1/ at 23/sup 0/C for the coefficient of the fine-structure density shift. Relativistic binding corrections to the positronium Zeeman transition were taken into account. (AIP)