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Towards ultrasensitive isotope trace analysis {sup 41}Ca.

Description: An Atom Trap Trace Analysis (ATTA) system based on the technique of laser manipulation of neutral atoms is being developed to count individual {sup 41}Ca atoms present in natural samples with an isotopic abundance of 10{sup -15}. Trapping of all stable calcium isotopes has been demonstrated and single-atom counting has been realized. For the most abundant isotope, {sup 40}Ca (97% isotopic abundance), a magneto-optical trap (MOT) loading rate of 2 x 10{sup 10} atoms/s has been reached at the overall capture efficiency of 1 x 10{sup -4}. System improvements could increase the efficiency by at least an order of magnitude.
Date: May 6, 2002
Creator: Moore, I. D.; Bailey, K.; Lu, Z.-T.; Mueller, P.; O'Connor, T. P. & Young, L.
Partner: UNT Libraries Government Documents Department

Towards measuring the charge radius of {sup 6}He and {sup 8}He.

Description: We report on the progress towards measuring the charge radius of {sup 6}He and {sup 8}He nuclei by performing laser spectroscopy on these helium atoms in a magneto optical trap (MOT). First tests to produce neutral {sup 6}He atoms via the {sup 12}C({sup 7}Li, {sup 6}He){sup 13}N reaction at the ATLAS accelerator have been successfully conducted. The MOT apparatus including the laser system and the discharge source to populate the metastable level are currently being set up.
Date: May 15, 2002
Creator: Mueller, P.; Wang, L.-B.; Bailey, K.; Drake, G. W. F.; Du, X.; Greens, J. et al.
Partner: UNT Libraries Government Documents Department