Статья

Identification of excited states in doubly odd<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msubsup><mml:mrow/><mml:mrow><mml:mn>63</mml:mn></mml:mrow><mml:mrow><mml:mn>140</mml:mn></mml:mrow></mml:msubsup></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Eu</mml:mi></mml:mrow><mml:mrow><mml:mn>77</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>by recoil-isomer tagging

D. M. CullenSchuster Laboratory, University of Manchester, Manchester, M13 9PL, United KingdomL. K. PattisonSchuster Laboratory, University of Manchester, Manchester, M13 9PL, United KingdomR. S. ChakrawarthySchuster Laboratory, University of Manchester, Manchester, M13 9PL, United KingdomD J DobsonSchuster Laboratory, University of Manchester, Manchester, M13 9PL, United KingdomJ. L. DurellSchuster Laboratory, University of Manchester, Manchester, M13 9PL, United KingdomS. J. FreemanSchuster Laboratory, University of Manchester, Manchester, M13 9PL, United KingdomD. T. ScholesSchuster Laboratory, University of Manchester, Manchester, M13 9PL, United KingdomC. ScholeySchuster Laboratory, University of Manchester, Manchester, M13 9PL, United KingdomE. S. PaulSchuster Laboratory, University of Manchester, Manchester, M13 9PL, United KingdomP. T. W. ChoySchuster Laboratory, University of Manchester, Manchester, M13 9PL, United KingdomP. T. GreenleesSchuster Laboratory, University of Manchester, Manchester, M13 9PL, United KingdomPeter G. JonesSchuster Laboratory, University of Manchester, Manchester, M13 9PL, United KingdomR. JulinSchuster Laboratory, University of Manchester, Manchester, M13 9PL, United KingdomS. JuutinenSchuster Laboratory, University of Manchester, Manchester, M13 9PL, United KingdomA. KeenanSchuster Laboratory, University of Manchester, Manchester, M13 9PL, United KingdomH. KettunenSchuster Laboratory, University of Manchester, Manchester, M13 9PL, United KingdomP. KuusiniemiSchuster Laboratory, University of Manchester, Manchester, M13 9PL, United KingdomM. LeinoSchuster Laboratory, University of Manchester, Manchester, M13 9PL, United KingdomA.-P. LeppänenSchuster Laboratory, University of Manchester, Manchester, M13 9PL, United KingdomP. NieminenSchuster Laboratory, University of Manchester, Manchester, M13 9PL, United KingdomJ. PakarinenSchuster Laboratory, University of Manchester, Manchester, M13 9PL, United KingdomP. RahkilaSchuster Laboratory, University of Manchester, Manchester, M13 9PL, United KingdomJ. UusitaloSchuster Laboratory, University of Manchester, Manchester, M13 9PL, United KingdomM. A. BentleySchuster Laboratory, University of Manchester, Manchester, M13 9PL, United KingdomD. T. JossSchuster Laboratory, University of Manchester, Manchester, M13 9PL, United Kingdom

2002lv

ABI

Аннотация

A fusion-evaporation reaction has been employed to search for isomeric states in the $N=77$ isotope ${}_{63}^{140}\mathrm{Eu}$ near the proton-drip line. The recoiling nuclei were implanted into a silicon detector, at the focal plane of a gas-filled separator, where prompt and delayed $\ensuremath{\gamma}$-ray transitions were correlated across isomeric states using recoil-isomer tagging. The feeding and decay of a new 299(3) ns isomeric state was established. This measurement represents the first observation of excited high-spin states in ${}^{140}\mathrm{Eu}.$ The behavior of the new states above the isomer is discussed in terms of theoretical calculations based upon the cranked-shell model and upon the experimental systematics of other $N=77$ isotones. Within this framework, the isomer is interpreted to be built upon a $\ensuremath{\pi}{h}_{11/2}\ensuremath{\bigotimes}\ensuremath{\nu}{h}_{11/2}$ two-quasiparticle configuration.

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Идентификаторы

DOI: 10.1103/physrevc.66.034308

Цитирования и источники

Цитирований: 2Использованных источников: 0

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