Test of Sequential Decay of Hot Nuclei Around 3 MeV/u Excitation Energy

Wu Heyu; Dai Guangxi

Chinese Physics C> 1995, Vol. 19> Issue(S1) : 13-20

Test of Sequential Decay of Hot Nuclei Around 3 MeV/u Excitation Energy

Wu Heyu ,
Dai Guangxi

Institute of Modem Physics, The Chinese Academy of Sciences, Lanzhou, China

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Abstract：
The splitting of hot nuclei into three massive fragments is analyzed by using a minimization procedure of difference between relative velocity and Coulomb repulsive velocity. It is utilized in ⁴⁰Ar+²⁰⁹Bi, ¹⁹⁷Au, ^l59Tb reactions at 25 MeV/u. The kinematics of ternary fragments emitted from excited nuclei with 3 MeV/u excitation energy produced by central collisions are presented. It is shown that the ternary fragments originate from two successive independent binary splitting. This result is also supported by the fact that experimental angular distributions of ternary fragments are nicely reproduced by sequential decays.
- hot nuclei ,
- Cascade emission of fission fragments ,
- prompt ternary fission ,
- the total kinetic energy (TKE) of fission ,
- angular distributions of ternary fission ,
- the Coulomb repulsive velocity

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Wu Heyu and Dai Guangxi. Test of Sequential Decay of Hot Nuclei Around 3 MeV/u Excitation Energy[J]. Chinese Physics C, 1995, 19(S1): 13-20.

Wu Heyu and Dai Guangxi. Test of Sequential Decay of Hot Nuclei Around 3 MeV/u Excitation Energy[J]. Chinese Physics C, 1995, 19(S1): 13-20. shu

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Received: 1994-02-03

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Test of Sequential Decay of Hot Nuclei Around 3 MeV/u Excitation Energy

Wu Heyu
Dai Guangxi

Institute of Modem Physics, The Chinese Academy of Sciences, Lanzhou, China

Received Date: 1994-02-03

Abstract: The splitting of hot nuclei into three massive fragments is analyzed by using a minimization procedure of difference between relative velocity and Coulomb repulsive velocity. It is utilized in ⁴⁰Ar+²⁰⁹Bi, ¹⁹⁷Au, ^l59Tb reactions at 25 MeV/u. The kinematics of ternary fragments emitted from excited nuclei with 3 MeV/u excitation energy produced by central collisions are presented. It is shown that the ternary fragments originate from two successive independent binary splitting. This result is also supported by the fact that experimental angular distributions of ternary fragments are nicely reproduced by sequential decays.