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Published on-line at 10:26:33 AM on Monday, January 7th, 2013
The size of the helium nucleus
PhD position at the LaserLaB of the Amsterdam University.
The PhD position is funded by the foundation for Fundamental Research on Matter (FOM), with a full FOM PhD salary and benefits. In the lab the appointed student will work together in the cold atoms and quantum gases team of 4 PhD students and one advanced researcher, supervised by dr. Wim Vassen. The research is also part of FOM program "Broken mirrors and drifting constants" (program leader Prof. dr. W. Ubachs, se also his seminar at LENS).
The goal is a 20-fold improvement in measuring the frequency of the forbidden 2 3S - 2 1S transition  in both 3He and 4He, laser-cooled to a temperature of ~1 μK above absolute zero. From the difference in the transition frequencies of both isotopes the difference in size of the α-particle (2 protons, 2 neutrons) and the helion (3He nucleus, 2 protons, 1 neutron) can be determined with attometer accuracy.
You can send your application or inquiries by email to Dr. W. Vassen (w.vassenvu.nl). The position can start any time but at the latest on September 1, 2013. Please include a letter of motivation, your CV, and 2 names with email addresses of references.
Source: Dr. Pablo Cancio Pastor
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