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Phys. Rev. Lett. 79, 375 - 378 (1997)

Magneto-optic Trapping of β-Decaying 38Km, 37K from an on-line Isotope Separator

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J. A. Behr1,3, A. Gorelov1, T. Swanson2,3, O. Häusser1,3, K. P. Jackson3, M. Trinczek2, U. Giesen4, J. M. D'Auria2, R. Hardy1, T. Wilson1, P. Choboter1, F. Leblond3, L. Buchmann3, M. Dombsky3, C. D. P. Levy3, G. Roy4, B. A. Brown5, and J. Dilling1,6
1Department of Physics, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6
2Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6
3TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, Canada V6T 2A3
4Department of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2N5
5National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824
6Physikalisches Institut der Universität Heidelberg, 69120 Heidelberg, Germany

Received 3 September 1996

A magneto-optic trap (MOT) can provide a well-polarized, backing-free, localized source of radioactive atoms for β-decay experiments. We have trapped approximately 6000 atoms of 38Km ( t1/2  =  0.925 s) and 2000 atoms of 37K (1.226 s) produced at the TRIUMF on-line separator TISOL in a vapor-cell MOT. We have measured optical isotope shifts and deduced the nuclear charge radii, which show an unusual lack of change at the neutron number N  =  20 shell closure. Plans include a search for scalar contributions to the β+- ν correlation in the 0+→0+ decay of 38Km.


©1997 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.79.375
DOI: 10.1103/PhysRevLett.79.375
PACS: 23.40.Bw, 29.25.Rm, 32.80.Pj, 32.80.Ys

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