Combining γ-ray and particle spectroscopy with SONIC@HORUS

Combining γ-ray and particle spectroscopy with SONIC@HORUS
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将 γ 射线和粒子光谱与 SONIC@HORUS 相结合

DOI:
10.1016/j.nima.2017.09.016
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发表时间:
2017
影响因子:
1.4
通讯作者:
A. Zilges
A. Zilges
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
S.G. Pickstone;M. Weinert;M. Färber;F. Heim;E. Hoemann;J. Mayer;M. Müscher;S. Prill;P. Scholz;M. Spieker;V. Vielmetter;J. Wilhelmy;A. Zilges

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用于粒子γ符合测量的粒子光谱仪SONIC在德国科隆的核物理研究所委托使用。SONIC由多达12个硅Δ E-E望远镜组成,总立体角覆盖范围为9%,并将补充HORUS,一个带有14个HPGe探测器的γ射线光谱仪。利用组合式装置SONIC@ HORUS,利用10 MV FN串联加速器提供的光束,研究了在光离子非弹性散射和转移反应激发下,低自旋态达到中子分离阈值的γ衰变行为。粒子-γ符合性方法将使用92 Mo (p, p ' γ)实验的数据。在119 Sn (d, X)实验中,由于硅探测器的能量分辨率约为20 keV,因此获得了很好的粒子识别效果。由于反应中不可忽略的动量转移,必须使用测量抛射能量和方向的附加信息,对探测到的γ射线能量进行多普勒校正。94 Mo (p, p′γ)实验的结果证明了该装置的高灵敏度,其中推导出了较小的γ衰变分支比。
The particle spectrometer SONIC for particle-γ coincidence measurements was commissioned at the Institute for Nuclear Physics in Cologne, Germany. SONIC consists of up to 12 silicon Δ E-E telescopes with a total solid angle coverage of 9%, and will complement HORUS, a γ-ray spectrometer with 14 HPGe detectors. The combined setup SONIC@ HORUS is used to investigate the γ-decay behaviour of low-spin states up to the neutron separation threshold excited by light-ion inelastic scattering and transfer reactions using beams provided by a 10 MV FN Tandem accelerator. The particle-γ coincidence method will be presented using data from a 92 Mo (p, p’γ) experiment. In a 119 Sn (d, X) experiment, excellent particle identification has been achieved because of the good energy resolution of the silicon detectors of approximately 20 keV. Due to the non-negligible momentum transfer in the reaction, a Doppler correction of the detected γ-ray energy has to be performed, using the additional information from measuring the ejectile energy and direction. The high sensitivity of the setup is demonstrated by the results from a 94 Mo (p, p’γ) experiment, where small γ-decay branching ratios have been deduced.
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