Measured and simulated 252Cf(sf) prompt neutron-photon competition

被引：22
|
作者：
Marcath, Matthew J. [1 ]
Haight, Robert C. [2 ]
Vogt, Ramona [3 ,4 ]
Devlin, Matthew [2 ]
Talou, Patrick [2 ]
Stetcu, Ionel [2 ]
Randrup, Jorgen [5 ]
Schuster, Patricia F. [1 ]
Clarke, Shaun D. [1 ]
Pozzi, Sara A. [1 ]
机构：
[1] Univ Michigan, Dept Nucl Engn & Radiol Sci, Ann Arbor, MI 48109 USA
[2] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
[3] Lawrence Livermore Natl Lab, Phys Div, Livermore, CA 94551 USA
[4] Univ Calif Davis, Phys Dept, Davis, CA 95616 USA
[5] Lawrence Berkeley Natl Lab, Nucl Sci Div, Berkeley, CA 94720 USA
来源：
PHYSICAL REVIEW C | 2018年 / 97卷 / 04期
关键词：
FISSION GAMMA-RAYS; EMISSION; DEEXCITATION; FRAGMENTS; DISTRIBUTIONS; ALGORITHM; MECHANISM; SPECTRUM; POLIMI;
D O I：
10.1103/PhysRevC.97.044622
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：
Neutrons and photons are characteristically emitted during the nuclear fission process when a deformed, neutron-rich nucleus divides into two fragments that then deexcite. During deexcitation, neutrons are emitted first, followed by photons; this process gives rise to correlated emissions. Few data exist on event-by-event neutron-photon correlation. In this work, Cf-252(sf) neutron and photon correlations were measured with an array of 45 liquid organic scintillation detectors and a fission chamber. The measured correlations are compared with MCPNX-PoliMi simulations using the built-in model and two event-by-event fission models, CGMF and FREYA, which predict correlations in prompt emissions from fission. Experimental results suggest weak neutron-photon competition during fragment deexcitation.
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页数：15
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