Superasymmetric fission of heavy nuclei induced by intermediate-energy protons

被引：15

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.

引用

页数：7

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