α-cluster and α-binucleon states of 1p-shell nuclei

Wolsky, R.; Gnilozub, I. A.; Kurgalin, Sergei; Tchuvil’sky, Yu. M.

doi:10.1134/s1063778810080144

Cited by 10 publications

(17 citation statements)

References 7 publications

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“…This state has been observed earlier in [29] [51]. A pair of states around 9.0 MeV was observed in the 16 O(t,p) reaction in [32]. Indirect arguments were given supporting the 4 + assignment for at least one of them [52] and it was argued in [52] This energy region is defined by the double peak structure with a very large 14 C(α,α) cross section at c.m.…”

Section: Experiments and Analysissupporting

confidence: 67%

“…This is a broad state with a dimensionless reduced α-width of 0. 16. This state appears on the left side of the last peak in Fig.…”

Section: (C) the Othermentioning

confidence: 79%

“…No clear evidence for inversion doublet rotational bands in 18 O was observed. Unlike in neighboring N = Z, even-even nuclei, 16 O and 20 Ne, the α-cluster strength is split among several states of the same spin-parity.…”

Section: Rotational Bands In 18 Omentioning

confidence: 93%

“…There have been numerous attempts to find the members of the inversion doublet rotational bands in 18 O that correspond to an 14 C(g.s. )+α configuration, in analogy to the well known rotational bands in 16 O and 20 Ne, but their the assignment into band members remains controversial.…”

Section: Rotational Bands In 18 Omentioning

confidence: 99%

“…[11]. An approach to clustering exploiting the Elliott SU(3) model [12] under the assumption that the wave functions of clustered states possess and unmixed SU(3) symmetry has been particularly successful in studies of multi-cluster systems such as 8 Be, 10 Be, 12 C, 16 O, 32 S [13][14][15][16][17]. However, purely algebraic models lack configuration mixing and are not expected to describe complex spectroscopy of states such as those in 18 O with two valence neutrons.…”

Section: Introductionmentioning

confidence: 99%

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α-cluster structure ofO18

et al. 2014

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Background: Clustering phenomena in N = Z nuclei provide an opportunity to understand the interplay between cluster and nucleon degrees of freedom. Purpose:To study resonances in the 18 O spectrum, populated in 14 C+α elastic scattering.Method: The Thick Target Inverse Kinematics (TTIK) technique was used to measure the excitation function for the 14 C+α elastic scattering. A 42 MeV 14 C beam was used to populate states of excitation energy up to 14.9 MeV in 18 O. The analysis was performed using a multi-level, multi-channel R-Matrix approach.Results: Detailed spectroscopic information, including spin-parities, partial α-and neutron-decay widths and dimensionless reduced widths, was obtained for excited states in 18 O between 8 and 14.9 MeV in excitation energy. Cluster-Nucleon Configuration Interaction Model calculations of the same quantities are performed and compared to the experimental results.Conclusions: Strong fragmentation of large α-cluster strengths is observed in the spectrum of 18 O making the α-cluster structure of 18 O quite different from the pattern of known quasi-rotational bands of alternating parity that are characteristic of N = Z, even-even nuclei like 16 O and 20 Ne.

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