Publication Date

6-26-2020

Document Type

Article

Department

Chemistry

Publication Title

Physical Review Letters

Volume

124

Issue

25

DOI

10.1103/PhysRevLett.124.252502

Abstract

In an experiment performed at Lawrence Berkeley National Laboratory's 88-inch cyclotron, the isotope Md244 was produced in the Bi209(Ar40,5n) reaction. Decay properties of Md244 were measured at the focal plane of the Berkeley Gas-filled Separator, and the mass number assignment of A=244 was confirmed with the apparatus for the identification of nuclide A. The isotope Md244 is reported to have one, possibly two, α-decaying states with α energies of 8.66(2) and 8.31(2) MeV and half-lives of 0.4-0.1+0.4 and ∼6 s, respectively. Additionally, first evidence of the α decay of Bk236 was observed and is reported.

Funding Number

DE-AC02-05CH11231

Funding Sponsor

U.S. Department of Energy

Comments

© 2020 American Physical Society

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