A new measurement of the fine-structure frequencies of the 2(3) P level in He-4 is presented. The result for the largest interval 2(3) P-0-2(3) P-1 is 29 616 952.7(1.0) kHz, and 2 291 167.7(11.0) kHz for the smallest one, 2(3) P-1-2(3) P-2. Taking into account this new result, an agreement among different experiments at the 1 kHz level is found. Implications of this situation for the determination of the fine-structure constant alpha are discussed.
Present status of the fine-structure frequencies of the 2(3)P helium level / G. Giusfredi; P. C. Pastor; P. De Natale; D. Mazzotti; C. de Mauro; L. Fallani; G. Hagel; V. Krachmalnicoff; M. Inguscio. - In: CANADIAN JOURNAL OF PHYSICS. - ISSN 0008-4204. - STAMPA. - 83:(2005), pp. 301-310. [10.1139/P04-075]
Present status of the fine-structure frequencies of the 2(3)P helium level
FALLANI, LEONARDO;INGUSCIO, MASSIMO
2005
Abstract
A new measurement of the fine-structure frequencies of the 2(3) P level in He-4 is presented. The result for the largest interval 2(3) P-0-2(3) P-1 is 29 616 952.7(1.0) kHz, and 2 291 167.7(11.0) kHz for the smallest one, 2(3) P-1-2(3) P-2. Taking into account this new result, an agreement among different experiments at the 1 kHz level is found. Implications of this situation for the determination of the fine-structure constant alpha are discussed.
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