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

被引：20

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.

引用

页数：15

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