Fusion Hindrance Factor of Heavy Nuclei Extracted from Experimental Data

Chin. Phys. Lett.

2006, Vol. 23

Issue (9): 2395-2398 DOI:

Original Articles

Fusion Hindrance Factor of Heavy Nuclei Extracted from Experimental Data

LIU Zu-Hua^1,2;ZHOU Hong-Yu¹

¹Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing 100875 ²China Institute of Atomic Energy, Beijing 102413

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LIU Zu-Hua, ZHOU Hong-Yu 2006 Chin. Phys. Lett. 23 2395-2398

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Abstract The reactions of ¹⁶O+²⁰⁴Pb, ⁸²Se+¹³⁸Ba and ⁹⁶Zr+¹²⁴Sn lead to the same compound nucleus ²²⁰Th. In terms of the assumption that the surviving probability is independent of entrance channel, we have extracted the fusion hindrance factor from the evaporation residue cross sections for the reactions of ⁸²Se+¹³⁸Ba and ⁹⁶Zr+¹²⁴Sn and compared with the results calculated using a two-parameter Smoluchowski equation. The theoretical predictions are basically in agreement with the experimental data. It is found that the probability of forming a compact ²²⁰Th is less than 10% for the reactions considered. For the systems more massive than ²²⁰Th, fusion should be much more strongly suppressed due to the competition of quasifission with complete fusion. Understanding of this inhibition is essential to forming new superheavy nuclei.

Keywords: 24.50.+g 25.40.Lw 25.70.Jj 27.90.+b

Published: 01 September 2006

PACS:	24.50.+g	(Direct reactions)
	25.40.Lw	(Radiative capture)
	25.70.Jj	(Fusion and fusion-fission reactions)
	27.90.+b	(A ≥ 220)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2006/V23/I9/02395

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