Superasymmetric fission of heavy nuclei induced by intermediate-energy protons

被引：16
作者：
Deppman, A. [1 ]
Andrade-, E., II [1 ]
Guimaraes, V. [1 ]
Karapetyan, G. S. [1 ]
Tavares, O. A. P. [2 ]
Balabekyan, A. R. [3 ]
Demekhina, N. A. [4 ,5 ]
Adam, J. [5 ]
Garcia, F. [6 ]
Katovsky, K. [7 ]
机构：
[1] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, Brazil
[2] Ctr Brasileiro Pesquisas Fis CBPF MCTI, BR-22290180 Rio De Janeiro, Brazil
[3] Yerevan State Univ, Fac Phys, Yerevan 0025, Armenia
[4] Yerevan Phys Inst, Yerevan 0036, Armenia
[5] Joint Inst Nucl Res, Flerov Lab Nucl React LNR, Moscow 141980, Russia
[6] Univ Estadual Santa Cruz UESC, Ctr PEsquisas Ciencia & Tecnol Radiacoes CPqCTR, Dept Ciencias Exatas & Tecnol DCET, Ilheus, BA, Brazil
[7] Czech Tech Univ, Dept Nucl Reactors, CR-16635 Prague, Czech Republic
来源：
PHYSICAL REVIEW C | 2013年 / 88卷 / 06期
基金：
巴西圣保罗研究基金会;
关键词：
CROSS-SECTION; INTRANUCLEAR CASCADE; CRISP PACKAGE; PHOTOFISSION; DISTRIBUTIONS; EVAPORATION; SPALLATION; FRAGMENTS; EMISSION; RANGE;
D O I：
10.1103/PhysRevC.88.064609
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 this work we present the results for the investigation of intermediate-mass fragment (IMF) production with the proton-induced reaction at 660 MeV on U-238 and Np-237 target. The data were obtained with the LNR Phasotron U-400M Cyclotron at Joint Institute for Nuclear Research (JINR), Dubna, Russia. A total of 93 isotopes, in the mass range of 30 < A < 200, were unambiguously identified with high precision. The fragment production cross sections were obtained by means of the induced-activation method in an off-line analysis. Mass-yield distributions were derived from the data and compared with the results of the simulation code CRISP for multimodal fission. A discussion of the superasymmetric fragment production mechanism is also given.
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页数：7
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