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- W2512596490 abstract "Background: Aspects of the nuclear structure of light $ensuremath{alpha}$-conjugate nuclei have long been associated with nuclear clustering based on $ensuremath{alpha}$ particles and heavier $ensuremath{alpha}$-conjugate systems such as $^{12}mathrm{C}$ and $^{16}mathrm{O}$. Such structures are associated with strong deformation corresponding to superdeformed or even hyperdeformed bands. Superdeformed bands have been identified in $^{40}mathrm{Ca}$ and neighboring nuclei and find good description within shell model, mean-field, and $ensuremath{alpha}$-cluster models. The utility of the $ensuremath{alpha}$-cluster description may be probed further by extending such studies to more challenging cases comprising lighter $ensuremath{alpha}$-conjugate nuclei such as $^{24}mathrm{Mg}, ^{28}mathrm{Si}$, and $^{32}mathrm{S}$.Purpose: The purpose of this study is to look for the number and energy of isoscalar ${0}^{+}$ states in $^{28}mathrm{Si}$. These states are the potential bandheads for superdeformed bands in $^{28}mathrm{Si}$ corresponding to the exotic structures of $^{28}mathrm{Si}$. Of particular interest is locating the ${0}^{+}$ bandhead of the previously identified superdeformed band in $^{28}mathrm{Si}$.Methods: $ensuremath{alpha}$-particle inelastic scattering from a $^{mathrm{nat}}mathrm{Si}$ target at very forward angles including ${0}^{ensuremath{circ}}$ has been performed at the iThemba Laboratory for Accelerator-Based Sciences in South Africa. Scattered particles corresponding to the excitation energy region of 6 to 14 MeV were momentum-analysed in the K600 magnetic spectrometer and detected at the focal plane using two multiwire drift chambers and two plastic scintillators.Results: Several ${0}^{+}$ states have been identified above 9 MeV in $^{28}mathrm{Si}$. A newly identified 9.71 MeV ${0}^{+}$ state is a strong candidate for the bandhead of the previously discussed superdeformed band. The multichannel dynamical symmetry of the semimicroscopic algebraic model predicts the spectrum of the excited ${0}^{+}$ states. The theoretical prediction is in good agreement with the experimental finding, supporting the assignment of the 9.71-MeV state as the bandhead of a superdeformed band.Conclusion: Excited isoscalar ${0}^{+}$ states in $^{28}mathrm{Si}$ have been identified. The number of states observed in the present experiment shows good agreement with the prediction of the multichannel dynamical symmetry." @default.
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- W2512596490 date "2017-02-16" @default.
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- W2512596490 title "<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mi>α</mml:mi></mml:math> clustering in <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mmultiscripts><mml:mi mathvariant=bold>Si</mml:mi><mml:mprescripts /><mml:none /><mml:mn>28</mml:mn></mml:mmultiscripts></mml:math> probed through the identification of high-lying <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msup><mml:mn>0</mml:mn><mml:mo>+</mml:mo></mml:msup></mml:math> states" @default.
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- W2512596490 doi "https://doi.org/10.1103/physrevc.95.024319" @default.
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