Positive-parity linear-chain molecular band in ${}^{16}$C

Abstract

An inelastic excitation and cluster-decay experiment ${}^2\mathrm{H}{(}^{16}\mathrm{C},{}^4\mathrm{He}+{}^{12}\mathrm{Be}\mathrm{or}{}^6\mathrm{He}+{}^{10}\mathrm{Be}){}^2\mathrm{H}$ was carried out to investigate the linear-chain clustering structure in neutron-rich ${}^{16}\mathrm{C}$. For the first time, decay-paths from the ${}^{16}\mathrm{C}$ resonances to various states of the final nuclei were determined, thanks to the well-resolved $Q$-value spectra obtained from the three-fold coincident measurement. The close-threshold resonance at 16.5 MeV is assigned as the $J^{\pi }=0^{+}$ band head of the predicted positive-parity linear-chain molecular band with $(3/2_{\pi }^{-}{)}^2(1/2_{\sigma }^{-}{)}^2$ configuration, according to the associated angular correlation and decay analysis. Other members of this band were found at 17.3, 19.4, and 21.6 MeV based on their selective decay properties, being consistent with the theoretical predictions. Another intriguing high-lying state was observed at 27.2 MeV which decays almost exclusively to ${}^6\mathrm{He}+{}^{10}\mathrm{Be}(\sim 6\mathrm{MeV})$ final channel, corresponding well to another predicted linear-chain structure with the pure $\sigma$-bond configuration.

arXiv comment6 pages, 4 figures

References in corpus (15)

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• The Galactic Center Massive Black Hole and Nuclear Star Cluster
• Microscopic Clustering in Light Nuclei
• Molecular-orbital structure in neutron-rich C isotopes
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• Selective decay from a candidate of the $\sigma$-bond linear-chain state in ${}^{14}$C
• Cluster structure of light nuclei
• Structure and decay pattern of linear-chain state in 14C
• 3alpha clustering in the excited states of 16C
• Evidence for Triangular D'(3h) Symmetry in 13C
• Characteristic αand ^{6}He decays of the linear-chains in ^{16}C
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• Investigation of the near-threshold cluster resonance in ${}^{14}\mathrm{C}$
• Spin determination from the in-plane angular correlation analysis for various coordinate systems

Cited by in corpus (9)

• Study of ground state properties of carbon isotopes with deformed relativistic Hartree-Bogoliubov theory in continuum
• Observation of the near-threshold intruder $0^{-}$ resonance in ${}^{12}$Be
• Construction and commissioning of the collinear laser spectroscopy system at BRIF
• The study of the alpha formation probability in 10Be and 12Be within the microscopic cluster model
• Shape of 13C studied by the real-time evolution method
• $\alpha$-cluster decay from ${}^{24}$Mg resonances produced in ${}^{12}$C(${}^{16}$O,${}^{24}$Mg)$\alpha$ reaction
• Commissioning and Full Realization of the PLASEN System at BRIF
• 4$\alpha$ linear-chain state produced by ${}^9$Be+${}^9$Be collision
• Property investigation for different wedge-shaped CsI(Tl)s