Abstract
The results of the joint experiments carried out by the Dubna-GANIL (France) and the Dubna-RIKEN (Japan) collaborations aimed at synthesizing new isotopes close to the neutron shells N=20 and N=28 and at studying their properties are presented. Gamma-spectroscopic methods were used to study low-lying states in 30,32Mg, 26–28Ne, 22O, and 18C. The ratios E(4+)/E(2+) were determined. A direct method was used to measure the masses of 20 nuclides located between the shells N=20 and N=28. The decay properties were determined for 30Ne and 26,27,29F. Information obtained in this way suggests the existence of a deformation close to the neutron shell N=20. The results of experiments devoted to searches for the doubly magic nucleus 28O are also presented. Only the upper limit on the cross section for its production was deduced, which can be taken as evidence of its instability.
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From Yadernaya Fizika, Vol. 64, No. 6, 2001, pp. 1197–1202.
Original English Text Copyright © 2001 by Penionzhkevich.
This article was submitted by the author in English.
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Penionzhkevich, Y.E. Research on neutron-rich nuclei in the region of the nuclear shells N=20 and N=28. Phys. Atom. Nuclei 64, 1121–1126 (2001). https://doi.org/10.1134/1.1383628
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DOI: https://doi.org/10.1134/1.1383628