Experimental study of the Ca$\mathsf{_2}$$\mathsf{^1}$S$\mathsf{+^1}$S asymptote
Experimental study of the Ca$\mathsf{_2}$$\mathsf{^1}$S$\mathsf{+^1}$S asymptote
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DOI：
10.1140/epjd/e2003-00208-4
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发表时间：
2003-10
期刊：
影响因子：
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通讯作者：
O. Allard;C. Samuelis;A. Pashov;H. Knöckel;E. Tiemann
中科院分区：
文献类型：
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作者：
O. Allard;C. Samuelis;A. Pashov;H. Knöckel;E. Tiemann
由光谱观测确定了1 S +1 S钙二聚体渐近线处的货车范德华系数C6、C8和C10。用滤波激光激发技术测量了Ca_2B-X系统从X基态的渐近能级到v”=38的跃迁频率。该能级仅比分子1 S +1 S渐近线低0.2 cm-1，其外经典转折点约为20 Ω。描述了从Monte Carlo模拟的实验数据中提取包括离解能在内的长程系数的置信限的方法。导出了散射波长的取值范围。
The van der Waals coefficients C6, C8and C10at the1S+1S calcium dimer asymptote are determined from spectroscopic observations. The filtered laser excitation technique was applied for measuring transition frequencies of the Ca2B-X system from asymptotic levels of the Xground state reachingv”=38. That level which is only 0.2 cm-1below the molecular1S+1S asymptote has an outer classical turning point of about 20 Å. The extraction of confidence limits for the long range coefficients including the dissociation energy from the experimental data involving Monte Carlo simulation is described. A range for thes-wave scattering length is derived.