Abstract book - Prof. Per Jensen, Ph.D. - Bergische Universität ...

Poster session, H20 133Study of Molecular Transitions of Rb and Cs Dimmers in StrongMagnetic Fields up to 7 kGY. Pashayan-Leroy 1 , C. Leroy 1 , G. Hakhumyan 1,2 , D. Sarkisyan 21 Laboratoire Interdisciplinaire Carnot Bourgogne UMR CNRS 6303 Université deBourgogne Dijon, 21078, France, yevgenya.pashayan-leroy@u-bourgogne.fr; 2 Institutefor Physical Research, NAS of Armenia, Ashtarak, 0203, ArmeniaPashayan-Leroy Y.Leroy C.Hakhumyan G.Sarkisyan D.A simple and efficient scheme based on one-dimensional nanometric-thin cells filledwith Rb and strong permanent ring magnets allowing of direct observation of thehyperfine Paschen–Back (HPB) regime on D 1 line in the range of 5-7 kG has beenreported recently 1 . For such large magnetic fields the eigenstates of the Hamiltonian aredescribed in the uncoupled basis of J (electron total angular momentum) and I (nuclearmagnetic momentum) projections (m J ;m I ). In particular, for σ + laser excitation, theslopes of B-field dependence of the frequency shifts for all 1-10 individual transitions of85 Rb and 87 Rb D 1 line are the same and equal to 1.86 MHz⁄G (see Fig.1).abFig. 1: a ) Magnetic field dependence of frequency shifts for transition components labeled 4 - 9 ( 85 Rb) and 1 - 3,10 ( 87 Rb, in the inset). Solid lines: theory; symbols: experiment. b) diagram of 85 Rb (I = 5/2) and 87 Rb (I = 3/2)transitions for + laser excitation in HPB regime. The selection rules: m J = +1; m I = 0.The use of thin cells allows of applying permanent magnets facilitating significantly thecreation of strong magnetic fields. In thin sealed-off high temperature sapphire cells (ofthickness L = 0.05-1 mm) filled with Rb or Cs and heated up to the temperature 200-300C (the smaller the thickness the higher the needed temperature), Rb 2 and Cs 2 dimmersare created. That's why it is important to clarify the optimum between the cell minimalthickness L and needed temperature to achieve large (detectable) absorption. The studyof dimmer transitions behavior in strong magnetic fields (5-7 kG) will be realized withthe help of strong permanent magnets using dimmer transmission spectra. Largesplitting and frequency shifts are expected for large values of quantum rotationalnumber J (J ~ 100).The research reported has received funding from the European Union FP7/2007-2013under grant agreement n° 205025-IPERA. Research conducted in the scope of theInternational Associated Laboratory (France-CNRS & SCS-Armenia) IRMAS.References[1] A. Sargsyan, G. Hakhumyan, C. Leroy, Y. Pashayan-Leroy, A. Papoyan, D.Sarkisyan, Opt. Lett. 37, 1379, 2012