High-resolution (e,e′p) study of the state at 6.79 MeV in 11B

Steenhoven, G. van der; Blok, H.P.; Herder, J. W. A. den; Jans, E.; Keizer, P.H.M.; Lapikás, L.; Quint, E.N.M.; Huberts, P.K.A. de Witt; Dean, G. W.; Brussaard, P.J.; Glaudemans, P.W.M.; Zwarts, D.

doi:10.1016/0370-2693(85)91498-4

Cited by 10 publications

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“…The pick-up of one proton from the (2s1d)-shell and the other one from the (1p)-shell could populate in this case odd-parity states in 10 Be with -values of = 1 or = 3 for the transfer of the proton-pair. But (sd)-shell admixtures in the ground state of 12 C are weak [26][27][28][29]. Simmonds et al [26] found in the 12 C(t, α) 11 B reaction for the proton pickup from 12 C to 5/2 + and 1/2 + final states of 11 B maximal spectroscopic factors of C 2 S = 0.14 ± 0.07.…”

Section: B Direct Transitions Odd-parity States and Two-step Mechanismmentioning

confidence: 99%

Structure ofBe10from theC12(
Bohlen
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,
Dorsch
²
,
Kokalova
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et al. 2007
Phys. Rev. C

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The 12 C( 12 C, 14 O) two-proton pick-up reaction has been measured at 211.4 MeV incident energy to study the structure of states of 10 Be up to excitation energies of 12 MeV. The measured partial angular distributions show pronounced oscillatory shapes, which were described by coupled-reaction-channels calculations. Spin-parity assignments could be derived from these characteristic shapes and two definite assignments have been made. The state at 11.8 MeV has been identified as the 4 + member of the ground-state band, and the state at 10.55 MeV is assigned J π = 3 − . At 5.96 MeV only the 1 − 1 member of the known 2 + 2 /1 − 1 doublet is populated. The angular distribution of the peak at 9.50 MeV, which consists of several unresolved states, has been unfolded using contributions from known states at 9.56 MeV, 2 + , and 9.27 MeV, 4 − . The inclusion of a state at 9.4 MeV reported by Daito et al. from the 10 B(t, 3 He) 10 Be reaction and tentatively assigned (3 + ) improved the fit considerably. A K = 2 band is formed with the 2 + 2 state as the band head and the (3 + ) state as the second member. The structures of the K π = 0 + 1 , 2 + 2 , and 1 − 1 bands are discussed.

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