Direct measurement of the fine-structure interval and g_J factors of singly ionized atomic carbon by laser magnetic resonance
Direct measurement of the fine-structure interval and g_J factors of singly ionized atomic carbon by laser magnetic resonance
复制标题
激光磁共振直接测量单电离原子碳的精细结构间距和g_J因子
DOI：
10.1086/184691
复制
发表时间：
1986
期刊：
影响因子：
--
通讯作者：
R. Saykally
中科院分区：
文献类型：
--
作者：
A. Cooksy;G. Blake;R. Saykally
我们给出了对单个的^2P基态进行激光磁共振测量的结果，
电离碳原子（C_II）。测定了^（12）C^+和^（13）C^+的2^P_（3/2）<$^2P_（12）精细结构间隔，其精度约为1 ppm，g_J因子约为1/10^4。
具体地说，我们发现g_（J=（12））= 0.66576（11）和g_（J=（3/2））= 1.33412（11），而对于^（12）C^+ ΔE_0（^2P_（3/2）<$^2P_（1/2））= 1900536.9在^（13）C^+中，ΔE_0（^2P_（3/2）<$^2P_（1/2））= 1900545.8（2.1）和ΔE（^2P（3/2）<$^2P_（1/2），F = 2 <$1）= 1900466.1（2.3）MHz。^（12）C_II和^（13）C_II精细结构间隔的高精度值验证了已经可靠的远红外天文学对C^+的识别，并且应该允许星际（^（12）C / ^（13）C）比，
在许多环境中明确地确定。
We present the results of laser magnetic resonance measurements performed on the ground ^2P state of singly
ionized atomic carbon (C_II). The 2^P_(3/2) ← ^2P_(1/2) fine-structure intervals of both ^(12)C^+ and ^(13)C^+ have been determined with a precision of approximately 1 ppm, and the g_J factors to approximately one part in 10^4.
Specifically, we find that g_(J=(1/2)) = 0.66576(11) and g_(J=(3/2)) = 1.33412(11), while for ^(12)C^+ ΔE_0(^2P_(3/2) ← ^2P_(1/2))= 1900536.9(1.3) MHz, with ΔE_0(^2P_(3/2) ← ^2P_(1/2)) = 1900545.8(2.1) and ΔE(^2P(3/2) ← ^2P_(1/2), F = 2 ← 1) = 1900466.1(2.3) MHz in ^(13)C^+. The highly precise values of the ^(12)C_II and ^(13)C_II fine-structure intervals verify the already secure far-infrared astronomical identification of C^+ and should allow the interstellar (^(12)C / ^(13)C) ratio to
be unambiguously determined in a number of environments.