Abstract
Free8Li (T 1/2=0.84 sec) atoms were polarized by spin exchange with optically pumped rubidium vapour. The8Li nuclei were produced by the reaction7Li(d, p)8Li in a thin LiF target. They recoiled into helium which was used as a buffer gas for optical pumping as well. Nuclear polarization up to 2% was detected by β-decay asymmetry. Rf transitions between hfs levels of the atomic ground state yielded the hfs separation ΔW=382.543(7) MHz. The nuclear spin assignmentI=2 was confirmed.
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This work was suggested by Prof. E. W. Otten. I wish to thank him for many stimulating discussions. I would like to express my thanks to Dr. U. Köpf for his permanent help and encouragement, and to Dr. Ch. von Platen, J. Bonn, J. Rodriguez-Giles, and G. Wagner for their assistance during the measurements. The hospitality of the Cyclotron Group of the Heidelberg Max-Planck-Institut für Kernphysik is gratefully acknowledged.
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Neugart, R. Spin exchange polarization and measurement of the hyperfine splitting of short-lived8Li. Z. Physik 261, 237–248 (1973). https://doi.org/10.1007/BF01391915
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DOI: https://doi.org/10.1007/BF01391915