New measurement of the excited states in B-11 via elastic resonance scattering of Be-10 + p
New measurement of the excited states in B-11 via elastic resonance scattering of Be-10 + p
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通过 Be-10 p 的弹性共振散射对 B-11 中的激发态进行新测量
DOI：
10.1103/physrevc.91.044302
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发表时间：
2015-03
影响因子：
3.1
通讯作者：
Wang J. S.
中科院分区：
文献类型：
--
作者：
Liu Y. D.;Wang H. W.;Ma Y. G.;Cao X. G.;Zhang G. Q.;Fang D. Q.;Lyu M.;He W. B.;Dai Z. T.;Li C.;Zhou C. L.;Ye S. Q.;Tao C.;Wang J.;Kumar S.;Han J. L.;Yang Y. Y.;Ma P.;Ma J. B.;Jin S. L.;Bai Z.;Jin L.;Yan D.;Wang J. S.
兰州重离子研究装置（HIRFL）采用逆运动学厚靶技术测量了从B-11衰变到Be-10基态的弹性共振散射质子。在共振弹性散射运动学过程假设下，通过多通道 R 矩阵程序很好地描述了所获得的激励函数。共振态的激发能范围为13.0至17.0 MeV，其共振参数如共振能E-x、自旋宇称J(pi)和质子衰变部分宽度Gamma(p)是根据数据的R矩阵拟合确定的。其中两个状态围绕 E-x = 14.55 MeV [J(pi) = (3/2(+), 5/2(+)), Gamma(p) = 475 +/- 80 keV] 和 E-x = 14.74 MeV [J(pi) = 3/2(-), Gamma(p) = 830 +/- 145 keV]，以及可能在 E-x 处填充的状态= 16.18 MeV [J(pi) = (1/2(-), 3/2-), Gamma(p) < 60 keV]，分别分配给 B-11 中众所周知的 14.34、15.29 和 16.43 MeV 态。这三个态的同位旋先前确定为T = 3/2，但由于当前的计数统计和能量分辨率，宽度和能量存在差异。我们将这些状态与之前的测量进行了比较，并讨论了可能聚集的共振的观察结果。
The elastic resonance scattering protons decayed from B-11 to the ground state of Be-10 were measured by 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 +/- 80 keV] and E-x = 14.74 MeV [J(pi) = 3/2(-), Gamma(p) = 830 +/- 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 B-11 at 14.34, 15.29, 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.
DOI：
10.1016/b978-0-08-021607-2.50001-5
发表时间：
1980-04
期刊：
--
影响因子：
--
作者：
J. Ziegler
通讯作者：
J. Ziegler
DOI：
10.1017/cbo9781139207249.009
发表时间：
2012
期刊：
--
影响因子：
--
作者：
W. Marsden
通讯作者：
W. Marsden