Статья

In-beam γ-ray spectroscopy and inclusive two-proton knockout cross section measurements at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>N</mml:mi><mml:mo>≈</mml:mo><mml:mn>40</mml:mn></mml:mrow></mml:math>

P. AdrichNational Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USAA. M. AmthorDepartment of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USAD. BazinNational Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USAM. D. BowenDepartment of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USAB. A. BrownDepartment of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USAC. M. CampbellDepartment of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USAJ. M. CookDepartment of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USAA. GadeDepartment of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USAD. GalavizNational Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USAT. GlasmacherDepartment of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USAS. McDanielDepartment of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USAD. MillerDepartment of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USAA. ObertelliNational Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USAY. ShimbaraNational Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USAK. SiwekDepartment of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USAJ. A. TostevinDepartment of Physics, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, Surrey GU2 7XH, United KingdomD. WeißhaarNational Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA

2008lv

ABI

Аннотация

In-beam \ensuremath{\gamma}-ray spectroscopy of $^{66,68}\mathrm{Fe}$ following intermediate-energy one- and two-proton knockout from cobalt and nickel secondary beams has been performed at the National Superconducting Cyclotron Laboratory. New transitions have been observed in $^{66}\mathrm{Fe}$ and $^{68}\mathrm{Fe}$. This is the first observation of \ensuremath{\gamma}-ray transitions in $^{68}\mathrm{Fe}$. In addition, $^{64}\mathrm{Cr}$ was produced using the $^{9}\mathrm{Be}$($^{66}\mathrm{Fe}$,$^{64}\mathrm{Cr}$)X two-proton knockout reaction. An unexpectedly low inclusive cross section is observed for this reaction, an order of magnitude smaller than for the $^{9}\mathrm{Be}$($^{68}\mathrm{Ni}$,$^{66}\mathrm{Fe}$)X reaction. This observation is discussed in terms of a significant structural difference between $^{66}\mathrm{Fe}$ and $^{64}\mathrm{Cr}$ and considerable admixtures of $\ensuremath{\nu}(\mathit{pf}){}^{n\ensuremath{-}2}({g}_{9/2}){}^{+2}$ configurations in the ground and excited states of $^{64}\mathrm{Cr}$ at $N=40$.

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Идентификаторы

DOI: 10.1103/physrevc.77.054306

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Цитирований: 2Использованных источников: 0

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