Fusion hindrance and synthesis of superheavy elements

doi:10.1134/S1063778806070027

	Fusion hindrance and synthesis of superheavy elements
	Abe, Y.; Kosenko, G. I.; Shen, C. W.; Bouriquet, B.; Marchix, A.; Boilley, D.; Giraud, B.
	2006-07
卷号	69
期号	7
DOI	10.1134/S1063778806070027
页码	1101-1109
英文摘要	A mechanism for fusion hindrance is clarified, based on the observation that the sticking configuration of projectile and target is located outside of the conditional saddle point. Accordingly, the fusion process is described by two sequential steps of passing over the Coulomb barrier and shape evolution toward the spherical compound nucleus. The latter one is indispensable in massive systems. With the use of a two-step model, excitation functions of fusion reaction are calculated for various combinations of projectiles and targets which lead to superheavy elements. The hindered fusion excitation measured is reproduced precisely without any adjustable parameter. Combined with survival probabilities calculated by the statistical theory of decay, excitation functions for residues of superheavy elements are calculated to compare with the systematic data measured for the cold fusion path. The peak positions and the widths are correctly reproduced, though it is necessary to reduce the shelf correction energies of the compound nuclei predicted by the structure calculations in order to reproduce their absolute values. Predictions are made for a few unknown heavier elements. Furthermore, a preliminary attempt toward the shell closure N = 184 is also presented using a neutron-rich secondary beam.
会议录	PHYSICS OF ATOMIC NUCLEI
会议录出版者	MAIK NAUKA/INTERPERIODICA/SPRINGER
会议录出版地	233 SPRING ST, NEW YORK, NY 10013-1578 USA
语种	英语
WOS研究方向	Physics
WOS记录号	WOS:000239431600002
内容类型	会议论文
源URL	[http://119.78.100.186/handle/113462/58578]
专题	中国科学院近代物理研究所
通讯作者	Abe, Y.
作者单位	1.Osaka Univ, Res Ctr Nucl Phys, Ibaraki, Japan 2.Omsk Univ, Dept Phys, Omsk, Russia 3.Ctr Theoret Nucl Phys, Natl Lab HIC, Lanzhou, Peoples R China 4.Australian Natl Univ, Dept Nucl Phys, Canberra, ACT, Australia 5.GANIL, F-14021 Caen, France 6.CE Saclay, Serv Phys Theor, Gif Sur Yvette, France
推荐引用方式 GB/T 7714	Abe, Y.,Kosenko, G. I.,Shen, C. W.,et al. Fusion hindrance and synthesis of superheavy elements[C]. 见:.