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Nuclear Experiment

arXiv:1503.05630 (nucl-ex)
[Submitted on 19 Mar 2015]

Title:New measurement of the excited states in $^{11}$B via the elastic resonance scattering of $^{10}$Be + p

Authors:Y. D. Liu, H. W. Wang, Y. G. Ma, X. G. Cao, G. Q. Zhang, D. Q. Fang, M. Lyu, W. B. He, Z. T. Dai, C. Li, C. L. Zhou, S. Q. Ye, C. Tao, J. Wang, S. Kumar, J. L. Han, Y. Y. Yang, P. Ma, J. B. Ma, S. L. Jin, Z. Bai, L. Jin, D. Yan, J. S. Wang
View a PDF of the paper titled New measurement of the excited states in $^{11}$B via the elastic resonance scattering of $^{10}$Be + p, by Y. D. Liu and 22 other authors
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Abstract:The elastic resonance scattering protons decayed from $^{11}$B to the ground state of $^{10}$Be were measured using the thick-target technique in inverse kinematics at the Heavy Ion Research Facility in Lanzhou (HIRFL). The obtained excitation functions were well described by a multichannel R-matrix procedure under the kinematics process assumption of resonant elastic scattering. The excitation energy of the resonant states ranges from 13.0 to 17.0 MeV, and their resonant parameters such as the resonant energy E$_{x}$, the spin-parity J$^\pi$, and the proton-decay partial width $\Gamma_p$ were determined from R-matrix fits to the data. Two of these states around E$_{x}$ = 14.55 MeV [J$^\pi$ = (3/2$^+$, 5/2$^+$), $\Gamma_p$ = 475 $\pm$ 80 keV] and E$_{x}$ = 14.74 MeV [J$^\pi$ = 3/2$^-$, $\Gamma_p$ = 830 $\pm$ 145 keV], and a probably populated state at E$_x$ = 16.18 MeV [J$^\pi$ =(1/2$^-$, 3/2$^-$), $\Gamma_p$ $<$ 60 keV], are respectively assigned to the well-known states in $^{11}$B at 14.34 MeV, 15.29 MeV, and 16.43 MeV. The isospin of these three states were previously determined to be T = 3/2, but discrepancies exist in widths and energies due to the current counting statistics and energy resolution. We have compared these states with previous measurements, and the observation of the possibly populated resonance is discussed.
Comments: 7 pages, 2 tables, 7 figures; Physical Review C (2015) accepted
Subjects: Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
Cite as: arXiv:1503.05630 [nucl-ex]
  (or arXiv:1503.05630v1 [nucl-ex] for this version)
  https://doi.org/10.48550/arXiv.1503.05630
arXiv-issued DOI via DataCite
Journal reference: Phys. Rev. C 91, 044302 (2015)
Related DOI: https://doi.org/10.1103/PhysRevC.91.044302
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From: Yu-Gang Ma [view email]
[v1] Thu, 19 Mar 2015 02:24:50 UTC (213 KB)
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