Статья

<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mtext> </mml:mtext><mml:mmultiscripts><mml:mi mathvariant="normal">Ba</mml:mi><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>136</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math>studied via deep-inelastic collisions: Identification of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msubsup><mml:mrow><mml:mo>(</mml:mo><mml:mrow><mml:mi>ν</mml:mi><mml:msub><mml:mi>h</mml:mi><mml:mrow><mml:mn>11</mml:mn><mml:mo>∕</mml:mo><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mo>)</mml:mo></mml:mrow><mml:mrow><mml:mn>10</mml:mn><mml:mo>+</mml:mo></mml:mrow><mml:mrow><mml:mo>−</mml:mo><mml:mn>2</mml:mn></mml:mrow></mml:msubsup></mml:mrow></mml:math>isomer

J. J. Valiente-DobónDepartment of Physics, University of Surrey, Guildford GU2 7XH, United KingdomP. H. ReganDepartment of Physics, University of Surrey, Guildford GU2 7XH, United KingdomC. WheldonDepartment of Physics, University of Surrey, Guildford GU2 7XH, United KingdomC. Y. WuDepartment of Physics, University of Rochester, New York 14627, USAN. YoshinagaDepartment of Physics, Saitama University, Saitama City 338-8570, JapanK. HigashiyamaDepartment of Physics, Saitama University, Saitama City 338-8570, JapanJ. F. SmithDepartment of Physics and Astronomy, Schuster Laboratory, University of Manchester, Manchester M13 9PL, United KingdomD. ClineDepartment of Physics, University of Rochester, New York 14627, USAR. S. ChakrawarthyDepartment of Physics and Astronomy, Schuster Laboratory, University of Manchester, Manchester M13 9PL, United KingdomR. ChapmanDepartment of Electronic Engineering and Physics, University of Paisley, Paisley PA1 2BE, United KingdomM. CromazLawrence Berkeley National Laboratory, Berkeley, California 94720, USAP. FallonLawrence Berkeley National Laboratory, Berkeley, California 94720, USAS. J. FreemanDepartment of Physics and Astronomy, Schuster Laboratory, University of Manchester, Manchester M13 9PL, United KingdomA. GörgenLawrence Berkeley National Laboratory, Berkeley, California 94720, USAW. GelletlyDepartment of Physics, University of Surrey, Guildford GU2 7XH, United KingdomA. B. HayesDepartment of Physics, University of Rochester, New York 14627, USAH. HuaDepartment of Physics, University of Rochester, New York 14627, USAS. D. LangdownDepartment of Physics, University of Surrey, Guildford GU2 7XH, United KingdomI. Y. LeeLawrence Berkeley National Laboratory, Berkeley, California 94720, USAX. LiangDepartment of Electronic Engineering and Physics, University of Paisley, Paisley PA1 2BE, United KingdomA. O. MacchiavelliLawrence Berkeley National Laboratory, Berkeley, California 94720, USAC. J. PearsonDepartment of Physics, University of Surrey, Guildford GU2 7XH, United KingdomZs. PodolyákDepartment of Physics, University of Surrey, Guildford GU2 7XH, United KingdomG. SlettenThe Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, 2100 Copenhagen, DenmarkR. TengDepartment of Physics, University of Rochester, New York 14627, USAD. WardLawrence Berkeley National Laboratory, Berkeley, California 94720, USAD. D. WarnerCCLRC Daresbury Laboratory, Warringdon WA 4AD, United KingdomA. YamamotoDepartment of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom

Physical Review Cjournal2004lv

ABI

Аннотация

A multinucleon transfer reaction between a thin self-supporting $_{ 78}^{198}\mathrm{Pt}$ target and an $850\phantom{\rule{0.3em}{0ex}}\text{MeV}$ $_{ 54}^{136}\mathrm{Xe}$ beam has been used to populate and study the structure of the $N=80$ isotone $_{ 56}^{136}\mathrm{Ba}$. Making use of time-correlated $\ensuremath{\gamma}$-ray spectroscopy, evidence for an ${I}^{\ensuremath{\pi}}=({10}^{+})$ isomeric state has been found with a measured half-life of $91\ifmmode\pm\else\textpm\fi{}2\phantom{\rule{0.3em}{0ex}}\text{ns}$. Prompt-delayed correlations have also enabled the tentative measurement of the near-yrast states which lie above the isomer. Shell-model calculations suggest that the isomer has a structure which can be assigned predominantly as ${(\ensuremath{\nu}{h}_{11∕2})}_{{10}^{+}}^{\ensuremath{-}2}$. The results are discussed in terms of standard and pair-truncated shell-model calculations, and compared to the even-$Z$ $N=80$ isotones ranging from $_{ 50}^{130}\mathrm{Sn}$ to $_{ 68}^{148}\mathrm{Er}$. A qualitative explanation of the observed dramatic decrease in the $B(E2:{10}^{+}\ensuremath{\rightarrow}{8}^{+})$ value for the $N=80$ isotones at $^{136}\mathrm{Ba}$ is given in terms of the increasing single-hole energy of the ${h}_{11∕2}$ neutron configuration as the proton subshell is filled. The angular momentum transfer to the binary fragments in the reaction has also been investigated in terms of the average total $\ensuremath{\gamma}$-ray fold versus the scattering angle of the recoils.

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Темы

Nuclear physics research studies Astronomical and nuclear sciences Quantum Chromodynamics and Particle Interactions

Идентификаторы

DOI: 10.1103/physrevc.69.024316

Цитирования и источники

Цитирований: 2 Использованных источников: 41

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