Effect of rotation in the γ-ray emission from 60 meV polarized neutron-induced fission of the 235U isotope

被引：7

作者：

Berikov, D. ^{[1
,2
]}

Ahmadov, G. ^{[1
,3
,4
,5
]}

Kopatch, Yu ^{[1
,6
]}

Gagarski, A. ^{[7
]}

Novitsky, V ^{[1
,6
]}

Deng, H. ^{[8
,9
]}

Danilyan, G. ^{[1
,6
]}

Masalovich, S. ^{[10
]}

Salhi, Z. ^{[11
]}

Babcock, E. ^{[11
]}

Klenke, J. ^{[10
]}

Hutanu, V ^{[8
,9
]}

机构：

[1] Joint Inst Nucl Res, Frank Lab Neutron Phys, Dubna 141980, Russia

[2] Natl Nucl Ctr Kazakhstan, Inst Nucl Phys, Alma Ata 050032, Kazakhstan

[3] Azerbaijan Natl Acad Sci CSSR, AZ-1143 Baku, Azerbaijan

[4] IRP, AZ-1143 Baku, Azerbaijan

[5] Natl Nucl Res Ctr, Dept Nucl Phys, AZ-1073 Baku, Azerbaijan

[6] Natl Res Ctr, Kurchatov Inst, Inst Theoret & Expt Phys, Moscow 117218, Russia

[7] Natl Res Ctr, Kurchatov Inst, Petersburg Nucl Phys Inst, Gatchina 188300, Leningradskaya, Russia

[8] Rhein Westfal TH Aachen, Inst Crystallog, D-85748 Garching, Germany

[9] Heinz Maier Leibnitz Zentrum MLZ, Julich Ctr Neutron Sci, D-85748 Garching, Germany

[10] Tech Univ Munich, Heinz Maier Leibnitz Zentrum MLZ, D-85748 Garching, Germany

[11] Heinz Maier Leibnitz Zentrum MLZ, Julich Ctr Neutron Sci JCNS, D-85748 Garching, Germany

来源：

PHYSICAL REVIEW C | 2021年 / 104卷 / 02期

关键词：

ANGULAR-DISTRIBUTION; TERNARY-FISSION; MOMENTUM; BINARY;

D O I：

10.1103/PhysRevC.104.024607

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：

In the paper we present the results obtained for the effect of rotation (ROT) in the angular distribution of prompt gamma rays from the fission of U-235 induced by monochromatic polarized "warm" neutrons (E-n = 60 meV). The polarization vector direction is determined at the target position in order to correctly determine the sign of the measured effect. The asymmetry parameter was found to be equal to R-gamma = -(17.3 +/- 2.8) x 10(-5). Moreover, the rotation angle of the fission axis was determined to be equal to 0.069 degrees +/- 0.008 degrees taking into account the fit results of the angular distribution of the prompt fission gamma rays. The obtained value and sign of the ROT effect are consistent with the results of the ROT effect obtained for cold neutrons. We describe the experiment, methodology of sign determination, and implications of the results.

引用

页数：7

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