Title
α-decay rates of 180,182,184Pb and the Z=82 shell closure
Document Type
Article
Publication Date
1-1-1999
Abstract
The proton-rich isotopes 180Pb, 182Pb, and 184Pb were produced in 92Mo bombardments of 90Zr, 92Zr, and 94Zr, respectively, and their α-decay properties were investigated with the use of a fragment mass analyzer and a double-sided Si strip detector. These data yielded unambiguous identifications of 180Pb and 182Pb and half-lives for all three Pb nuclei that are more precise than previously available values. An examination of α reduced widths in the Pb mass region leads to the conclusion that the Z=82 shell gap is greatly reduced for neutron numbers midway between 82 and 126. Available mass data, manifested in ΔQα values and two-proton separation energies of even-even nuclei with the same neutron numbers, support this conclusion.
Publication Source (Journal or Book title)
Physical Review C - Nuclear Physics
First Page
113021
Last Page
113025
Recommended Citation
Toth, K., Bingham, C., Batchelder, J., Brown, L., Conticchio, L., Davids, C., Irvine, R., Seweryniak, D., Moltz, D., Walters, W., Wauters, J., & Zganjar, E. (1999). α-decay rates of 180,182,184Pb and the Z=82 shell closure. Physical Review C - Nuclear Physics, 60 (1), 113021-113025. Retrieved from https://repository.lsu.edu/physics_astronomy_pubs/6162