NH3自增宽谱中速度依赖效应的证据：玻耳兹曼常量的新测定
Evidence for speed-dependent effects in NH3 self-broadened spectra: towards a new determination of the Boltzmann constant
摘要：
在本文中，我们提出了一个精确的分析的形状孤立的振转氨线从强nu 2带约10 $μ$ m，记录的激光吸收光谱。在受控的温度和压力下获得的实验光谱，面临着各种模型，考虑到迪克缩小或速度依赖的影响。我们的研究结果显示了明显的证据，速度依赖的加宽和移位，这是迄今为止在NH3中从未证明过的。得到了nu ~ 2saQ（6，3）线的精确线形参数。我们目前的项目旨在通过激光光谱测量玻耳兹曼常量，kB，将直接受益于这些知识。我们预计，第一次光学测定kB的竞争力的几个ppm的不确定性，现在是可以达到的。
英文摘要：
In this paper we present an accurate analysis of the shape of an isolated rovibrational ammonia line from the strong nu2 band around 10 $μ$m, recorded by laser absorption spectroscopy. Experimental spectra obtained under controlled temperature and pressure, are confronted to various models that take into account Dicke narrowing or speed-dependent effects. Our results show clear evidence for speed-dependent broadening and shifting, which had never been demonstrated so far in NH3. Accurate lineshape parameters of the nu2 saQ(6,3) line are obtained. Our current project aiming at measuring the Boltzmann constant, kB, by laser spectroscopy will straight away benefit from such knowledge. We anticipate that a first optical determination of kB with a competitive uncertainty of a few ppm is now reachable.
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。
