Analyzing power of AGATA triple clusters for gamma-ray linear polarization

被引：10

作者：

Bizzeti, P. G. ^{[1
,2
]}

Sona, P. ^{[1
,2
]}

Michelagnoli, C. ^{[3
,4
]}

Melon, B. ^{[1
,2
]}

Bazzacco, D. ^{[3
]}

Farnea, E. ^{[3
]}

Bizzeti-Sona, A. M. ^{[1
,2
]}

de Angelis, G. ^{[5
]}

Gadea, A. ^{[6
]}

Gottardo, A. ^{[5
]}

Lunardi, S. ^{[3
,4
]}

Menegazzo, R. ^{[3
]}

Mengoni, D. ^{[3
,4
]}

Nannini, A. ^{[2
]}

Napoli, D. R. ^{[5
]}

Perego, A. ^{[1
,2
]}

Recchia, F. ^{[3
,4
]}

Sahin, E. ^{[5
]}

Valiente-Dobon, J. J. ^{[5
]}

Ur, C. A. ^{[3
]}

机构：

[1] Univ Florence, Dipartimento Fis, Florence, Italy

[2] Ist Nazl Fis Nucl, Sez Firenze, I-50125 Florence, Italy

[3] Ist Nazl Fis Nucl, Sez Padova, Padua, Italy

[4] Univ Padua, Dipartimento Fis, Padua, Italy

[5] Ist Nazl Fis Nucl, Lab Nazl Legnaro, Padua, Italy

[6] Univ Valencia, CSIC, IFIC, E-46003 Valencia, Spain

来源：

EUROPEAN PHYSICAL JOURNAL A | 2015年 / 51卷 / 04期

关键词：

COMPTON POLARIMETER; QUADRUPOLE-MOMENTS; TRACKING; DETECTOR; STATES;

D O I：

10.1140/epja/i2015-15049-4

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

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 Pd-104 and Pd-108, 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 Cs-137 radioactive source. We obtain an average analyzing power of 0.451(34) at 433.9 keV and 0.484(24) at 555.8 keV.

引用

页数：11

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