Conference
Accurate determination of the Boltzmann constant by Doppler spectroscopy: Towards a new definition of the kelvin
| العنوان: | Accurate determination of the Boltzmann constant by Doppler spectroscopy: Towards a new definition of the kelvin |
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| المؤلفون: | Darquié, Benoît, Mejri, Sinda, Sow, Papa Lat Tabara, Lemarchand, Cyril, Triki, Meriam, Tokunaga, Sean, J. Bordé, Christian, Chardonnet, Christian, Daussy, Christophe |
| المساهمون: | Laboratoire de Physique des Lasers (LPL), Université Paris 13 (UP13)-Centre National de la Recherche Scientifique (CNRS) |
| المصدر: | EPJ Web of Conferences ; ICAP 2012 – 23rd International Conference on Atomic Physics ; https://hal.archives-ouvertes.fr/hal-01165895 ; ICAP 2012 – 23rd International Conference on Atomic Physics, Jul 2012, Palaiseau, France. pp.02005, ⟨10.1051/epjconf/20135702005⟩ |
| بيانات النشر: | HAL CCSD |
| سنة النشر: | 2012 |
| المجموعة: | Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
| مصطلحات موضوعية: | [PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph] |
| جغرافية الموضوع: | Palaiseau, France |
| الوصف: | proceedings of the ICAP 2012 conference (23rd International Conference on Atomic Physics) ; International audience ; Accurate molecular spectroscopy in the mid-infrared region allows precision measurements of fundamental constants. For instance, measuring the linewidth of an isolated Doppler-broadened absorption line of ammonia around 10 µm enables a determination of the Boltzmann constant k B. We report on our latest measurements. By fitting this lineshape to several models which include Dicke narrowing or speed-dependent collisional effects, we find that a determination of k B with an uncertainty of a few ppm is reachable. This is comparable to the best current uncertainty obtained using acoustic methods and would make a significant contribution to any new value of k B determined by the CODATA. Furthermore, having multiple independent measurements at these accuracies opens the possibility of defining the kelvin by fixing k B , an exciting prospect considering the upcoming redefinition of the International System of Units. |
| نوع الوثيقة: | conference object |
| اللغة: | English |
| Relation: | info:eu-repo/semantics/altIdentifier/arxiv/1506.06464; hal-01165895; https://hal.archives-ouvertes.fr/hal-01165895; https://hal.archives-ouvertes.fr/hal-01165895/document; https://hal.archives-ouvertes.fr/hal-01165895/file/darquie_proc_ICAP2012.pdf; ARXIV: 1506.06464 |
| DOI: | 10.1051/epjconf/20135702005 |
| الاتاحة: | https://hal.archives-ouvertes.fr/hal-01165895 https://hal.archives-ouvertes.fr/hal-01165895/document https://hal.archives-ouvertes.fr/hal-01165895/file/darquie_proc_ICAP2012.pdf https://doi.org/10.1051/epjconf/20135702005 |
| Rights: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.8E537525 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1051/epjconf/20135702005 |
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