A beam transport line for magneto-optical trapping experiments with radioactive francium

Stancari, G.; Corradi, L.; Dainelli, A.

doi:10.1016/j.nima.2008.06.034

Cited by 8 publications

(6 citation statements)

References 26 publications

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“…Therefore, the increase of the production is advantageous to realize the trap. In this regard, the groups of SUNY [4] and LNL [12] realized Fr MOT with a production yield comparable with our own, and so the yield is not a serious problem.…”

Section: Towards Fr Motsupporting

confidence: 76%

Towards the Measurement of the Electric-Dipole Moment of Radioactive Francium using Laser-Cooling and Trapping Techniques

Kawamura¹,

Ando²,

Aoki³

et al. 2015

Proceedings of the Conference on Advances in Radioactive Isotope Science (ARIS2014)

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An experiment to search for the electron electric dipole moment using francium is planned to test the new physics beyond the standard model. The optical lattice trapping of the francium that is produced through the nuclear fusion reaction at high heat may allow for a precise measurement of the electric dipole moment. The magneto-optical trapping of the francium is required as a precooling treatment. The factory of laser-cooled francium atoms has been developed for the magneto-optical trap. Currently, the apparatus that is able to trap a few atoms is constructed to identify the resonant frequency of francium.

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Section: Towards Fr Motsupporting

confidence: 76%

Towards the Measurement of the Electric-Dipole Moment of Radioactive Francium using Laser-Cooling and Trapping Techniques

Kawamura¹,

Ando²,

Aoki³

et al. 2015

Proceedings of the Conference on Advances in Radioactive Isotope Science (ARIS2014)

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“…Therefore, to shed light on physics beyond the SM or, in fact, to observe a nonzero atomic EDM, the heaviest of the alkali atoms, francium (Fr), seems to be another suitable candidate for its relatively simple spectroscopic levels and large enhancement factor. A number of spectroscopic studies on Fr has been carried out at SUNY Stony Brook using the laser trapping technique, and it has been proposed both for EDM and atomic parity violation (APV) measurements. In fact, there is a preliminary calculation available for the enhancement factor of Fr using the sum-over-states approach, where the contributions from the important bound states are included and the contributions of the continuum states are taken in an approximate way .…”

Section: Introductionmentioning

confidence: 99%

Relativistic Coupled Cluster (RCC) Computation of the Electric Dipole Moment Enhancement Factor of Francium Due to the Violation of Time Reversal Symmetry

Mukherjee¹,

Sahoo

Nataraj

et al. 2009

J. Phys. Chem. A

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A relativistic many-body theory for the electric dipole moment (EDM) of paramagnetic atoms arising from the electric dipole moment of the electron is presented and implemented. The relativistic coupled-cluster method with single and double excitations (RCCSD) using the Dirac-Coulomb Hamiltonian and a weak parity and time reversal violating interaction to the first-order of perturbation has been employed to obtain the EDM enhancement factor for the ground state of the Fr atom due to the intrinsic EDM of the electron. The trends of different correlation effects and the leading contributions from different physical states are discussed. Our results in combination with that of the Fr EDM experiment that is currently in progress possess the potential to probe the validity of the standard model (SM) of elementary particle physics.

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“…Present activities with radioactive atoms in magnetooptical traps include parity violation in β decays of Rb and Cs isotopes at LANL [8] and Na isotopes by the TRIµP team at KVI (Netherlands) [9]; the study of anapole moments in francium at TRIUMF (Canada) [10]; and EDM searches in Ra at ANL (USA) [11] and KVI [12], and in Fr at RCNP-CYRIC in Japan [13]. Our group built the first European facility for the production and trapping of francium at INFN's national laboratories in Legnaro, Italy [14,15,16,17]. Our long-term goal is to measure parity violation in the atomic transitions of francium.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of vapor-cell magneto-optical traps for efficient trapping of radioactive atoms

et al. 2009

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We have studied magneto-optical traps (MOTs) for efficient on-line trapping of radioactive atoms. After discussing a model of the trapping process in a vapor cell and its efficiency, we present the results of detailed experimental studies on Rb MOTs. Three spherical cells of different sizes were used. These cells can be easily replaced, while keeping the rest of the apparatus unchanged: atomic sources, vacuum conditions, magnetic field gradients, sizes and power of the laser beams, detection system. By direct comparison, we find that the trapping efficiency only weakly depends on the MOT cell size. It is also found that the trapping efficiency of the MOT with the smallest cell, whose diameter is equal to the diameter of the trapping beams, is about 40% smaller than the efficiency of larger cells. Furthermore, we also demonstrate the importance of two factors: a long coated tube at the entrance of the MOT cell, used instead of a diaphragm; and the passivation with an alkali vapor of the coating on the cell walls, in order to minimize the losses of trappable atoms. These results guided us in the construction of an efficient large-diameter cell, which has been successfully employed for on-line trapping of Fr isotopes at INFN's national laboratories in Legnaro, Italy.PACS. 32.80.Pj Optical cooling of atoms; trapping -29.25.Rm Sources of radioactive nuclei -32.80.Ys Weak interaction effects in atoms

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A beam transport line for magneto-optical trapping experiments with radioactive francium

Cited by 8 publications

References 26 publications

Towards the Measurement of the Electric-Dipole Moment of Radioactive Francium using Laser-Cooling and Trapping Techniques

Towards the Measurement of the Electric-Dipole Moment of Radioactive Francium using Laser-Cooling and Trapping Techniques

Relativistic Coupled Cluster (RCC) Computation of the Electric Dipole Moment Enhancement Factor of Francium Due to the Violation of Time Reversal Symmetry

Experimental study of vapor-cell magneto-optical traps for efficient trapping of radioactive atoms

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