Prompt γ-ray production in neutron-induced fission of 239Pu

被引：40

作者：

Ullmann, J. L. ^{[1
]}

Bond, E. M. ^{[1
]}

Bredeweg, T. A. ^{[1
]}

Couture, A. ^{[1
]}

Haight, R. C. ^{[1
]}

Jandel, M. ^{[1
]}

Kawano, T. ^{[1
]}

Lee, H. Y. ^{[1
]}

O'Donnell, J. M. ^{[1
]}

Hayes, A. C. ^{[1
]}

Stetcu, I. ^{[1
]}

Taddeucci, T. N. ^{[1
]}

Talou, P. ^{[1
]}

Vieira, D. J. ^{[1
]}

Wilhelmy, J. B. ^{[1
]}

Becker, J. A. ^{[2
]}

Chyzh, A. ^{[2
]}

Gostic, J. ^{[2
]}

Henderson, R. ^{[2
]}

Kwan, E. ^{[2
]}

Wu, C. Y. ^{[2
]}

机构：

[1] Los Alamos Natl Lab, Los Alamos, NM 87544 USA

[2] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

来源：

PHYSICAL REVIEW C | 2013年 / 87卷 / 04期

关键词：

NUCLEAR-DATA; DANCE; CF-252;

D O I：

10.1103/PhysRevC.87.044607

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：

Background: The prompt gamma-ray spectrum from fission is important for understanding the physics of nuclear fission, and also in applications involving fission. Relatively few measurements of the prompt gamma spectrum from Pu-239(n, f) have been published. Purpose: This experiment measured the multiplicity, individual gamma energy spectrum, and total gamma energy spectrum of prompt fission gamma rays from Pu-239(n, f) in the neutron energy range from thermal to 30 keV, to test models of fission and to provide information for applications. Method: Gamma rays from neutron-induced fission of Pu-239 were measured using the DANCE gamma-ray calorimeter. Fission events were tagged by detecting fission products in a parallel-plate avalanche counter in the center of DANCE. The measurements were corrected for detector response using a GEANT4 model of DANCE. A detailed analysis for the gamma rays from the 1(+) resonance complex at 10.93 eV is presented. Results: A six-parameter analytical parametrization of the fission gamma-ray spectrum was obtained. A Monte Carlo Hauser-Feshbach calculation provided good general agreement with the data, but some differences remain to be resolved. Conclusions: An analytic parametrization can be made of the gamma-ray multiplicity, energy distribution, and total-energy distribution for the prompt gamma rays following neutron-induced fission of Pu-239. This parametrization may be useful for applications. Modern Monte Carlo Hauser-Feshbach calculations can do a good job of calculating the fission gamma-ray emission spectrum, although some details remain to be understood. DOI: 10.1103/PhysRevC.87.044607

引用

页数：7