Linear Chain

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Z Bai - One of the best experts on this subject based on the ideXlab platform.

  • positive parity Linear Chain molecular band in 16 c
    Physical Review Letters, 2020
    Co-Authors: Yu-xin Liu, M Kimura, Jian-ling Lou, T. Baba, Biao Yang, X F Yang, H Hua, J S Wang, Y Yang, Z Bai
    Abstract:

    An inelastic excitation and cluster-decay experiment ^{2}H(^{16}C,^{4}He+^{12}Be or ^{6}He+^{10}Be)^{2}H was carried out to investigate the Linear-Chain clustering structure in neutron-rich ^{16}C. For the first time, decay paths from the ^{16}C resonances to various states of the final nuclei were determined, thanks to the well-resolved Q-value spectra obtained from the threefold coincident measurement. The close-threshold resonance at 16.5 MeV is assigned as the J^{π}=0^{+} band head of the predicted positive-parity Linear-Chain molecular band with (3/2_{π}^{-})^{2}(1/2_{σ}^{-})^{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}He+^{10}Be(∼6  MeV) final channel, corresponding well to another predicted Linear-Chain structure with the pure σ-bond configuration.

M Kimura - One of the best experts on this subject based on the ideXlab platform.

  • Positive-parity Linear-Chain molecular band in $^{16}$C
    Physical Review Letters, 2020
    Co-Authors: Yu-xin Liu, M Kimura, Jian-ling Lou, Xiaofei Yang, T. Baba, Biao Yang
    Abstract:

    An inelastic excitation and cluster-decay experiment ^{2}H(^{16}C,^{4}He+^{12}Be or ^{6}He+^{10}Be)^{2}H was carried out to investigate the Linear-Chain clustering structure in neutron-rich ^{16}C. For the first time, decay paths from the ^{16}C resonances to various states of the final nuclei were determined, thanks to the well-resolved Q-value spectra obtained from the threefold coincident measurement. The close-threshold resonance at 16.5 MeV is assigned as the J^{π}=0^{+} band head of the predicted positive-parity Linear-Chain molecular band with (3/2_{π}^{-})^{2}(1/2_{σ}^{-})^{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}He+^{10}Be(∼6  MeV) final channel, corresponding well to another predicted Linear-Chain structure with the pure σ-bond configuration.

  • positive parity Linear Chain molecular band in 16 c
    Physical Review Letters, 2020
    Co-Authors: Yu-xin Liu, M Kimura, Jian-ling Lou, T. Baba, Biao Yang, X F Yang, H Hua, J S Wang, Y Yang, Z Bai
    Abstract:

    An inelastic excitation and cluster-decay experiment ^{2}H(^{16}C,^{4}He+^{12}Be or ^{6}He+^{10}Be)^{2}H was carried out to investigate the Linear-Chain clustering structure in neutron-rich ^{16}C. For the first time, decay paths from the ^{16}C resonances to various states of the final nuclei were determined, thanks to the well-resolved Q-value spectra obtained from the threefold coincident measurement. The close-threshold resonance at 16.5 MeV is assigned as the J^{π}=0^{+} band head of the predicted positive-parity Linear-Chain molecular band with (3/2_{π}^{-})^{2}(1/2_{σ}^{-})^{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}He+^{10}Be(∼6  MeV) final channel, corresponding well to another predicted Linear-Chain structure with the pure σ-bond configuration.

  • Characteristic alpha and He-6 decays of Linear-Chain structures in C-16
    Physical Review C, 2018
    Co-Authors: T. Baba, M Kimura
    Abstract:

    The Linear-Chain states of $^{16}$C and their decay modes are theoretically investigated by using the antisymmetrized molecular dynamics. It is found that the positive-parity Linear-Chain states have the $(3/2^-_\pi)^2(1/2^-_\sigma)^2$ configuration and primary decay to the $^{12}$Be($2^+_1$) as well as to the $^{12}$Be(g.s.) by the $\alpha$ particle emission. Moreover, we show that they also decay to the $^6{\rm He}+{}^{10}{\rm Be}$ channel. In the negative-parity states, it is found that two types of the Linear-Chains exist. One has the valence neutrons occupying the molecular-orbits $(3/2^-_\pi)^2(1/2^-_\sigma)(3/2^+_\pi)$, while the other's configuration cannot be explained in terms of the molecular orbits because of the strong parity mixing. Both configurations constitute the rotational bands with large moment of inertia and intra-bands $E2$ transitions. Their $\alpha$ and ${}^{6}{\rm He}$ reduced widths are sufficiently large to be distinguished from other non-cluster states although they are smaller than those of the positive-parity Linear-Chain.

  • Structure and decay pattern of Linear-Chain states in neutron-rich Carbon isotopes
    Journal of Physics: Conference Series, 2017
    Co-Authors: T. Baba, M Kimura
    Abstract:

    The Linear-Chain states of14C are studied by using the antisymmetrized molecular dynamics. The calculated properties of the Linear-Chain states were compared with the observed data. The results for the π-bond Linear-Chain states reasonably agree with the observation. It is also shown that the Linear-Chain states decay to the excited states of10Be. Hence, we regard that this unique decay pattern is a strong evidence of the Linear-Chain formation.

  • Three-body decay of Linear-Chain states in C14
    Physical Review C, 2017
    Co-Authors: T. Baba, M Kimura
    Abstract:

    The decay properties of the Linear-Chain states in $^{14}$C are investigated by using the antisymmetrized molecular dynamics. The calculation predicts two rotational bands with Linear-Chain configurations having the $\pi$-bond and $\sigma$-bond valence neutrons. For the $\pi$-bond Linear-Chain, the calculated excitation energies and the widths of $\alpha$-decay to the ground state of $^{10}{\rm Be}$ reasonably agree with the experimental candidates observed by the $\alpha+{}^{10}{\rm Be}$ resonant scattering. On the other hand, the $\sigma$-bond Linear-Chain is the candidate of the higher-lying resonant states reported by the break-up reaction. As the evidence of the $\sigma$-bond Linear-Chain, we discuss its decay pattern. It is found that the $\sigma$-bond Linear-Chain not only decays to the excited band of $^{10}{\rm Be}$ but also decays to the three-body channel of $^{6}{\rm He}+\alpha+\alpha$, and the branching ratio of these decays are comparable. Hence, we suggest that this characteristic decay pattern is a strong signature of the Linear-Chain formation and a key observable to distinguish two different Linear-Chains.

Yu-xin Liu - One of the best experts on this subject based on the ideXlab platform.

  • Positive-parity Linear-Chain molecular band in $^{16}$C
    Physical Review Letters, 2020
    Co-Authors: Yu-xin Liu, M Kimura, Jian-ling Lou, Xiaofei Yang, T. Baba, Biao Yang
    Abstract:

    An inelastic excitation and cluster-decay experiment ^{2}H(^{16}C,^{4}He+^{12}Be or ^{6}He+^{10}Be)^{2}H was carried out to investigate the Linear-Chain clustering structure in neutron-rich ^{16}C. For the first time, decay paths from the ^{16}C resonances to various states of the final nuclei were determined, thanks to the well-resolved Q-value spectra obtained from the threefold coincident measurement. The close-threshold resonance at 16.5 MeV is assigned as the J^{π}=0^{+} band head of the predicted positive-parity Linear-Chain molecular band with (3/2_{π}^{-})^{2}(1/2_{σ}^{-})^{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}He+^{10}Be(∼6  MeV) final channel, corresponding well to another predicted Linear-Chain structure with the pure σ-bond configuration.

  • positive parity Linear Chain molecular band in 16 c
    Physical Review Letters, 2020
    Co-Authors: Yu-xin Liu, M Kimura, Jian-ling Lou, T. Baba, Biao Yang, X F Yang, H Hua, J S Wang, Y Yang, Z Bai
    Abstract:

    An inelastic excitation and cluster-decay experiment ^{2}H(^{16}C,^{4}He+^{12}Be or ^{6}He+^{10}Be)^{2}H was carried out to investigate the Linear-Chain clustering structure in neutron-rich ^{16}C. For the first time, decay paths from the ^{16}C resonances to various states of the final nuclei were determined, thanks to the well-resolved Q-value spectra obtained from the threefold coincident measurement. The close-threshold resonance at 16.5 MeV is assigned as the J^{π}=0^{+} band head of the predicted positive-parity Linear-Chain molecular band with (3/2_{π}^{-})^{2}(1/2_{σ}^{-})^{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}He+^{10}Be(∼6  MeV) final channel, corresponding well to another predicted Linear-Chain structure with the pure σ-bond configuration.

Biao Yang - One of the best experts on this subject based on the ideXlab platform.

  • Positive-parity Linear-Chain molecular band in $^{16}$C
    Physical Review Letters, 2020
    Co-Authors: Yu-xin Liu, M Kimura, Jian-ling Lou, Xiaofei Yang, T. Baba, Biao Yang
    Abstract:

    An inelastic excitation and cluster-decay experiment ^{2}H(^{16}C,^{4}He+^{12}Be or ^{6}He+^{10}Be)^{2}H was carried out to investigate the Linear-Chain clustering structure in neutron-rich ^{16}C. For the first time, decay paths from the ^{16}C resonances to various states of the final nuclei were determined, thanks to the well-resolved Q-value spectra obtained from the threefold coincident measurement. The close-threshold resonance at 16.5 MeV is assigned as the J^{π}=0^{+} band head of the predicted positive-parity Linear-Chain molecular band with (3/2_{π}^{-})^{2}(1/2_{σ}^{-})^{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}He+^{10}Be(∼6  MeV) final channel, corresponding well to another predicted Linear-Chain structure with the pure σ-bond configuration.

  • positive parity Linear Chain molecular band in 16 c
    Physical Review Letters, 2020
    Co-Authors: Yu-xin Liu, M Kimura, Jian-ling Lou, T. Baba, Biao Yang, X F Yang, H Hua, J S Wang, Y Yang, Z Bai
    Abstract:

    An inelastic excitation and cluster-decay experiment ^{2}H(^{16}C,^{4}He+^{12}Be or ^{6}He+^{10}Be)^{2}H was carried out to investigate the Linear-Chain clustering structure in neutron-rich ^{16}C. For the first time, decay paths from the ^{16}C resonances to various states of the final nuclei were determined, thanks to the well-resolved Q-value spectra obtained from the threefold coincident measurement. The close-threshold resonance at 16.5 MeV is assigned as the J^{π}=0^{+} band head of the predicted positive-parity Linear-Chain molecular band with (3/2_{π}^{-})^{2}(1/2_{σ}^{-})^{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}He+^{10}Be(∼6  MeV) final channel, corresponding well to another predicted Linear-Chain structure with the pure σ-bond configuration.

Jian-ling Lou - One of the best experts on this subject based on the ideXlab platform.

  • Positive-parity Linear-Chain molecular band in $^{16}$C
    Physical Review Letters, 2020
    Co-Authors: Yu-xin Liu, M Kimura, Jian-ling Lou, Xiaofei Yang, T. Baba, Biao Yang
    Abstract:

    An inelastic excitation and cluster-decay experiment ^{2}H(^{16}C,^{4}He+^{12}Be or ^{6}He+^{10}Be)^{2}H was carried out to investigate the Linear-Chain clustering structure in neutron-rich ^{16}C. For the first time, decay paths from the ^{16}C resonances to various states of the final nuclei were determined, thanks to the well-resolved Q-value spectra obtained from the threefold coincident measurement. The close-threshold resonance at 16.5 MeV is assigned as the J^{π}=0^{+} band head of the predicted positive-parity Linear-Chain molecular band with (3/2_{π}^{-})^{2}(1/2_{σ}^{-})^{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}He+^{10}Be(∼6  MeV) final channel, corresponding well to another predicted Linear-Chain structure with the pure σ-bond configuration.

  • positive parity Linear Chain molecular band in 16 c
    Physical Review Letters, 2020
    Co-Authors: Yu-xin Liu, M Kimura, Jian-ling Lou, T. Baba, Biao Yang, X F Yang, H Hua, J S Wang, Y Yang, Z Bai
    Abstract:

    An inelastic excitation and cluster-decay experiment ^{2}H(^{16}C,^{4}He+^{12}Be or ^{6}He+^{10}Be)^{2}H was carried out to investigate the Linear-Chain clustering structure in neutron-rich ^{16}C. For the first time, decay paths from the ^{16}C resonances to various states of the final nuclei were determined, thanks to the well-resolved Q-value spectra obtained from the threefold coincident measurement. The close-threshold resonance at 16.5 MeV is assigned as the J^{π}=0^{+} band head of the predicted positive-parity Linear-Chain molecular band with (3/2_{π}^{-})^{2}(1/2_{σ}^{-})^{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}He+^{10}Be(∼6  MeV) final channel, corresponding well to another predicted Linear-Chain structure with the pure σ-bond configuration.