تقرير
Measuring the Boltzmann constant by mid-infrared laser spectroscopy of ammonia
| العنوان: | Measuring the Boltzmann constant by mid-infrared laser spectroscopy of ammonia |
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| المؤلفون: | Mejri, S., Sow, Papa, Kozlova, O., Ayari, C., Tokunaga, Sean, Chardonnet, C., Briaudeau, S., Darquié, B., Rohart, F., Daussy, C. |
| المصدر: | Metrologia 52 (2015) S314-S323 |
| سنة النشر: | 2015 |
| المجموعة: | Physics (Other) Quantum Physics |
| مصطلحات موضوعية: | Physics - Atomic Physics, Physics - Optics, Quantum Physics |
| الوصف: | We report on our ongoing effort to measure the Boltzmann constant, $k_B,$ using the Doppler broadening technique on ammonia. This paper presents some of the improvements made to the mid-infrared spectrometer including the use of a phase-stabilized quantum cascade laser, a lineshape analysis based on a refined physical model and an improved fitting program 2 increasing the confidence in our estimates of the relevant molecular parameters, and a first evaluation of the saturation parameter and its impact on the measurement of k B. A summary of the systematic effects contributing to the measurement is given and the optimal experimental conditions for mitigating those effects in order to reach a competitive measurement of $k_B$ at a part per million accuracy level are outlined. |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1088/0026-1394/52/5/S314 |
| URL الوصول: | http://arxiv.org/abs/1506.01828 |
| رقم الأكسشن: | edsarx.1506.01828 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1088/0026-1394/52/5/S314 |
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