Predominant Time Scales in Fission Processes in Reactions of S, Ti and Ni with W: Zeptosecond versus Attosecond

被引：111

作者：

du Rietz, R. ^{[1
]}

Hinde, D. J. ^{[1
]}

Dasgupta, M. ^{[1
]}

Thomas, R. G. ^{[1
]}

Gasques, L. R. ^{[1
]}

Evers, M. ^{[1
]}

Lobanov, N. ^{[1
]}

Wakhle, A. ^{[1
]}

机构：

[1] Australian Natl Univ, Dept Nucl Phys, Res Sch Phys & Engn, Canberra, ACT 0200, Australia

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 05期

基金：

澳大利亚研究理事会;

关键词：

QUASI-FISSION; FUSION-FISSION; HEAVY; PROBE;

D O I：

10.1103/PhysRevLett.106.052701

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The inhibition of fusion by quasifission is crucial in limiting the formation of superheavy elements in collisions of heavy nuclei. Time scales of similar to 10(-18) s inferred for fissionlike events from recent crystal blocking measurements were interpreted to show either that quasifission itself is slower than previously believed, or that the fraction of slow fusion-fission is higher than expected. New measurements of massangle distributions for Ti-48 and Ni-64 bombarding W targets show that in these reactions quasifission is the dominant process, typically occurring before the system formed after contact has made a single rotation, corresponding to time scales of <= 10(-20) s.

引用

页数：4

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