Abstract
Excited structures in the proton-rich nucleus 140Dy have been established following the decay of an 8− isomer. The excitation energy of the isomer is established to be 2.16 MeV with a half-life of 7.3±1.5 μs. The isomer decays into the yrast line at the 8+ state, revealing a rotational band with a deduced deformation of β2=0.24(3). The isotope 140Dy is the daughter of the deformed proton emitter 141Ho. The new information obtained here supports the role of deformation in proton emission and the previous assignments of single-particle configurations to the two proton emitting states in 141Ho. In addition, the reduced hindrance factor measured for the isomer is consistent with the trend observed in the N=74 isotones.
Highlights
In 131Eu, additional information was obtained by observing proton decay to the ground state of the daughter nucleus, 130Sm, and to the first excited 2+ level [4]
The proton drip line can be readily delineated, above Z = 50, by nuclei which decay by the emission of a proton
Based on the measured halflives, the proton emitting states have been interpreted as requiring the presence of a sizeable quadrupole deformation, and the decay rates have been reproduced using, for example, the multiparticle theory of proton emission from deformed nuclei by Bugrov and Kadmensky [3]
Summary
In 131Eu, additional information was obtained by observing proton decay to the ground state of the daughter nucleus, 130Sm, and to the first excited 2+ level [4].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
