Dissipative dynamics in quasifission

被引：93

作者：

Oberacker, V. E. ^{[1
]}

Umar, A. S. ^{[1
]}

Simenel, C. ^{[2
]}

机构：

[1] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA

[2] Australian Natl Univ, Dept Nucl Phys, RSPE, Canberra, ACT 0200, Australia

来源：

PHYSICAL REVIEW C | 2014年 / 90卷 / 05期

基金：

澳大利亚研究理事会;

关键词：

EXCITATION-ENERGY DIVISION; HARTREE-FOCK CALCULATIONS; FUSION-FISSION; HEAVY; COLLISIONS; SYSTEMATICS;

D O I：

10.1103/PhysRevC.90.054605

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：

Quasifission is the primary reaction mechanism that prevents the formation of superheavy elements in heavy-ion fusion experiments. Employing the time-dependent density functional theory approach, we study quasifission in the systems Ca-40,Ca-48+U-238. Results show that for Ca-48 projectiles the quasifission is substantially reduced in comparison to the Ca-40 case. This partly explains the success of superheavy element formation with Ca-48 beams. For the first time, we also calculate the repartition of excitation energies of the two fragments in a dynamic microscopic theory. The differences between both systems are interpreted in terms of initial neutron to proton asymmetry of the colliding partners.

引用

页数：5

共 63 条

[41] THE CONDITIONS FOR THE SYNTHESIS OF HEAVY-NUCLEI [J].

SCHMIDT, KH ;

MORAWEK, W .

REPORTS ON PROGRESS IN PHYSICS, 1991, 54 (07) :949-1003

[42] Time-dependent Hartree-Fock calculations for multinucleon transfer processes in 40,48Ca+124Sn, 40Ca+208Pb, and 58Ni+208Pb reactions [J].

Sekizawa, Kazuyuki ;

Yabana, Kazuhiro .

PHYSICAL REVIEW C, 2013, 88 (01)

[43] FISSION AND QUASIFISSION IN U-INDUCED REACTIONS [J].

SHEN, WQ ;

ALBINSKI, J ;

GOBBI, A ;

GRALLA, S ;

HILDENBRAND, KD ;

HERRMANN, N ;

KUZMINSKI, J ;

MULLER, WFJ ;

STELZER, H ;

TOKE, J ;

BACK, BB ;

BJORNHOLM, S ;

SORENSEN, SP .

PHYSICAL REVIEW C, 1987, 36 (01) :115-142

[44] Formation and dynamics of fission fragments [J].

Simenel, C. ;

Umar, A. S. .

PHYSICAL REVIEW C, 2014, 89 (03)

[45] Microscopic approach to coupled-channels effects on fusion [J].

Simenel, C. ;

Dasgupta, M. ;

Hinde, D. J. ;

Williams, E. .

PHYSICAL REVIEW C, 2013, 88 (06)

[46] Influence of entrance-channel magicity and isospin on quasi-fission [J].

Simenel, C. ;

Hinde, D. J. ;

du Rietz, R. ;

Dasgupta, M. ;

Evers, M. ;

Lin, C. J. ;

Luong, D. H. ;

Wakhle, A. .

PHYSICS LETTERS B, 2012, 710 (4-5) :607-611

[47]

Simenel C, 2012, EUR PHYS J A, V48, DOI 10.1140/epja/i2012-12152-0

[48] Particle-Number Fluctuations and Correlations in Transfer Reactions Obtained Using the Balian-Veneroni Variational Principle [J].

Simenel, Cedric .

PHYSICAL REVIEW LETTERS, 2011, 106 (11)

[49] Particle Transfer Reactions with the Time-Dependent Hartree-Fock Theory Using a Particle Number Projection Technique [J].

Simenel, Cedric .

PHYSICAL REVIEW LETTERS, 2010, 105 (19)

[50] Spontaneous fission modes and lifetimes of superheavy elements in the nuclear density functional theory [J].

Staszczak, A. ;

Baran, A. ;

Nazarewicz, W. .

PHYSICAL REVIEW C, 2013, 87 (02)

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