Effects of nuclear orientation on the mass distribution of fission fragments in the reaction of 36S+238U

被引：132

作者：

Nishio, K. ^{[1
]}

Ikezoe, H. ^{[1
]}

Mitsuoka, S. ^{[1
]}

Nishinaka, I. ^{[1
]}

Nagame, Y. ^{[1
]}

Watanabe, Y. ^{[2
]}

Ohtsuki, T. ^{[3
]}

Hirose, K. ^{[3
]}

Hofmann, S. ^{[4
,5
]}

机构：

[1] Japan Atom Energy Agcy, Tokai, Ibaraki 3191195, Japan

[2] KEK, High Energy Accelerator Res Org, Inst Particle & Nucl Studies, Tsukuba, Ibaraki 3050801, Japan

[3] Tohoku Univ, Nucl Sci Lab, Sendai, Miyagi 9820826, Japan

[4] Gesell Schwerionenforsch mbH, D-64291 Darmstadt, Germany

[5] Goethe Univ Frankfurt, Inst Kernphys, D-60486 Frankfurt, Germany

来源：

PHYSICAL REVIEW C | 2008年 / 77卷 / 06期

关键词：

D O I：

10.1103/PhysRevC.77.064607

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：

Fragment mass distributions for fission after full momentum transfer were measured for the reaction S-36+U-238 at bombarding energies around the Coulomb barrier. The data revealed a transition from symmetry to asymmetry mass distributions when the beam energies were decreased from above-barrier to sub-barrier values. The main components of the asymmetric mass distribution are at A(H)approximate to 200 and A(L)approximate to 74. The asymmetric fission is attributed to quasifission of the reacting system at polar collisions, whereas the symmetric fission originates from the compound nucleus produced in equatorial collisions. The results suggest a strong influence of orientation effects of the deformed target nuclei on fusion.

引用

页数：5

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