Fragment dependence of high energy γ-ray emission in the spontaneous fission of 252Cf

被引：4

作者：

Biswas, DC ^{[1
]}

Nayak, BK

Cinausero, M

Fornal, B

Viesti, G

Bazzacco, D

DePoli, M

Fabris, D

Fioretto, E

Lunardon, M

Napoli, DR

Nebbia, G

Prete, G

Ur, CA

Vedovato, G

机构：

[1] Bhabha Atom Res Ctr, Mumbai, India

[2] Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy

[3] Inst Nucl Phys, Krakow, Poland

[4] Univ Padua, Dipartimento Fis, Padua, Italy

[5] Ist Nazl Fis Nucl, Sez Padova, Padua, Italy

来源：

EUROPEAN PHYSICAL JOURNAL A | 1999年 / 4卷 / 04期

关键词：

D O I：

10.1007/s100500050242

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：

The high energy gamma-ray emission accompanying the spontaneous fission of Cf-252 has been measured in coincidence with individual fission fragments selected by discrete gamma-ray transitions. The enhancement of the gamma-ray emission probability in the energy range E-gamma=3-8 MeV has been observed for the fission fragments in the region of nearly symmetric mass splitting, confirming results reported in previous investigations. The gamma-gamma coincidence technique employed in the present work clearly demonstrate that the major contribution to this enhancement is caused by the fission channels where one fragment is near to the N=82 or Z=50 shell closures. The high energy gamma-ray emission probability does not show any significant dependence on the number of neutrons emitted in the fission process, supporting the hypothesis that high energy gamma-rays are mainly emitted from the fragments after the neutron evaporation.

引用

页码：343 / 348

页数：6

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