Analyzing power of AGATA triple clusters for gamma-ray linear polarization
Analyzing power of AGATA triple clusters for gamma-ray linear polarization
复制标题
分析 AGATA 三团簇的伽马射线线性偏振功率
DOI：
10.1140/epja/i2015-15049-4
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
C. Ur
中科院分区：
文献类型：
--
作者：
P. Bizzeti;P. Sona;C. Michelagnoli;B. Melon;D. Bazzacco;E. Farnea;A. Bizzeti;G. de Angelis;A. Gadea;A. Gottardo;S. Lunardi;R. Menegazzo;D. Mengoni;A. Nannini;D. Napoli;A. Perego;F. Recchia;E. Sahin;J. Valiente;C. Ur
摘要。我们利用康普顿散射微分截面的方位角依赖性，研究了AGATA三团簇测量伽马射线线偏振的能力。为此，在104Pd和108Pd的第一激发态的库仑激发下产生了部分极化的伽马射线，它们分别以555.8 keV和433.9 keV的伽马射线衰减到基态。脉冲形状分析和伽马射线跟踪技术被用来确定锗晶体内部相互作用点的位置和时间顺序。利用137Cs放射源的661.6 keV伽马，考虑了探测效率的各向异性。我们在433.9 keV和555.8 keV下分别获得0.451（34）和0.484（24）的平均分析功率。
Abstract.We have investigated the ability of AGATA triple clusters to measure the linear polarization of gamma rays, exploiting the azimuthal-angle dependence of the Compton scattering differential cross section. To this aim, partially polarized gamma rays have been produced by Coulomb excitation of the first excited state of 104Pd and 108Pd, which decay to the ground state by emission of gamma rays of 555.8 keV and 433.9 keV, respectively. Pulse-shape analysis and gamma-ray tracking techniques have been used to determine the position and time sequence of the interaction points inside the germanium crystals. Anisotropies in the detection efficiency have been taken into account using 661.6 keV gammas from a 137Cs radioactive source. We obtain an average analyzing power of 0.451(34) at 433.9 keV and 0.484(24) at 555.8 keV.
70Se 中 2(1) 态光谱四极矩符号的测量：没有扁圆形状的证据。
影响因子：
8.6
作者：
Hurst AM
通讯作者：
Hurst AM