[seminar] Seminar na IF-u, 24. ožujka 2015. u 15:00h

[Niksa Krstulovic]

Institut za fiziku, Bijenička cesta 46, 

predavaonica u zgradi Mladen Paić utorak, 24. ožujka 2015., u 15:00 sati 


Precision Spectroscopy of Atomic Hydrogen 


Dr. Sc. Thomas Udem 



Max-Planck-Institut für Quantenoptik, Garching E-mail: thomas.udem at mpq.mpg.de 



Precise determination of transition frequencies of simple atomic systems are required for a number of fundamental applications such as tests of quantum electrodynamics (QED), the determination of fundamental constants and nuclear charge radii. The sharpest transition in atomic hydrogen occurs between the metastable 2S state and the 1S ground state. Its transition frequency has now been measured with almost 15 digits accuracy using an optical frequency comb and a cesium atomic clock as a reference. A recent measurement of the Lamb shift in muonic hydrogen is in significant contradiction to the hydrogen data if QED calculations are assumed to be correct. We hope to contribute to the resolution of this so called "proton size puzzle" by providing additional experimental input from the hydrogen side. http://www.mpq.mpg.de 




Voditelji seminara IF-a: Nikša Krstulović i Osor Bari šić 










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Nikša Krstulović, PhD 
Research associate 


Institute of Physics 
Bijenicka 46 
HR-10000 Zagreb, Croatia 

Phone: 00385 1 4698 872 
00385 1 4698 851 
Fax: 00385 1 4698 889 

http://www.ifs.hr/ 
http://spectra.ifs.hr/ 
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