Статья

Identification of excited states in 140Dy

D. M. CullenDepartment of Physics and Astronomy, University of Manchester, Manchester M13 9PL, UKM. P. CarpenterPhysics Division, Argonne National Laboratory, Argonne, IL 60439, USAC. N. DavidsPhysics Division, Argonne National Laboratory, Argonne, IL 60439, USAA.M. FletcherDepartment of Physics and Astronomy, University of Manchester, Manchester M13 9PL, UKS. J. FreemanDepartment of Physics and Astronomy, University of Manchester, Manchester M13 9PL, UKR. V. F. JanssensPhysics Division, Argonne National Laboratory, Argonne, IL 60439, USAF. G. KondevTechnology Development Division, Argonne National Laboratory, Argonne, IL 60439, USAC. J. ListerPhysics Division, Argonne National Laboratory, Argonne, IL 60439, USAL. K. PattisonDepartment of Physics and Astronomy, University of Manchester, Manchester M13 9PL, UKD. SeweryniakPhysics Division, Argonne National Laboratory, Argonne, IL 60439, USAJ. F. SmithDepartment of Physics and Astronomy, University of Manchester, Manchester M13 9PL, UKA. M. BruceSchool of Engineering, University of Brighton, Brighton, BN2 4GJ, UKK. Abu SaleemDepartment of Physics, Illinois Institute of Technology, Chicago, IL 60616, USAI. AhmadPhysics Division, Argonne National Laboratory, Argonne, IL 60439, USAA. HeinzPhysics Division, Argonne National Laboratory, Argonne, IL 60439, USAT. L. KhooPhysics Division, Argonne National Laboratory, Argonne, IL 60439, USAE. F. MoorePhysics Division, Argonne National Laboratory, Argonne, IL 60439, USAG. MukherjeeDepartment of Physics, University of Massachusetts, Lowell, MA 01854, USAC. WheldonDepartment of Physics, University of Surrey, Guildford GU2 7XH, UKA. WoehrUniversity of Maryland, College Park, MD 20742, USA

2002en

ABI

Аннотация

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 ps. 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. © 2002 Elsevier Science B.V. All rights reserved.

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Идентификаторы

DOI: 10.1016/s0370-2693(02)01222-4

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