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首页> 外文期刊>Physical review, C >(d, n) proton-transfer reactions on Be-9, B-11, C-13, N-14,N-15, and F-19 and spectroscopic factors at E-d=16 MeV
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(d, n) proton-transfer reactions on Be-9, B-11, C-13, N-14,N-15, and F-19 and spectroscopic factors at E-d=16 MeV

机译：（d，n）在E-D = 16 mev上的BE-9，B-11，C-13，N-14，N-15和F-19和光谱因子的质子转移反应

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摘要

The (d, n) reaction has been studied with targets of Be-9, B-11, C-13, N-14,N-15, and F-19 at E-d = 16MeV using a deuterated liquid-scintillator array. Advanced spectral unfolding techniques with accurately measured scintillator response functions were employed to extract neutron energy spectra without the need for long-path neutron time-of-flight. An analysis of the proton-transfer data at forward angles to the ground states of the final nuclei, using finite-range distorted-wave Born approximation analysis with common bound-state, global, and local optical-model parameter sets, yields a set of self-consistent spectroscopic factors. These are compared with the results of several previous time-of-flight measurements, most done many years ago for individual nuclei at lower energy and often analyzed using zero-range transfer codes. In contrast to some of the earlier published data, our data generally compare well with simple shell-model predictions, with little evidence for uniform quenching (reduction from shell-model values) that has previously been reported from analysis of nucleon knock-out reactions. Data for low-lying excited states in N-14 from C-13(d, n) also is analyzed and spectroscopic information relevant to nuclear astrophysics obtained. A preliminary study of the radioactive ion beam induced reaction Be-7(d, n), E(Be-7) = 30MeV was carried out and indicates further improvements are needed for such measurements, which require detection of neutrons with E-n < 2MeV.
机译：已经使用氘代液 - 闪烁体阵列与E-D = 16mev的BE-9，B-11，C-13，N-14，N-15和F-19的靶标进行（D，N）反应。采用精确测量的闪烁体响应函数的高级光谱展开技术来提取中子能谱，无需长达中子飞行时间。对前角度的质子传输数据与最终核的地面状态分析，使用具有常见界限，全局和本地光学模型参数集的有限范围扭曲波出生的近似分析，产生一组自我一致的光谱因素。这些与前两次飞行时间测量结果的结果进行了比较，多年前为单个核在较低能量下进行并且经常使用零距离传输码进行分析。与一些早期公布的数据相比，我们的数据通常与简单的壳牌模型预测相比很好地比较，并且少于先前报告了核子敲除反应的均匀淬火（从壳模型值减少）的证据。从C-13（D，N）中的N-14中的低洼激发态的数据也分析了与获得的核天体物理学相关的光谱信息。对放射性离子束诱导反应的初步研究进行了e-7（d，n），E（be-7）= 30mev，并表明这种测量需要进一步的改进，这需要用E-N <2mev检测中子。

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