The Angular Distributions of intermediate Mass Fragments Emittsd in 30 MeV/u 40Ar+58,64Ni and 115In Reactions

Gou Quanbu; Zhu Yongtai; Xu Hushan; Wei Zhiyong; Lu Jun; Zhang Yuhu; Wang Qi; Li Songlin; Wu Zhongli

Chinese Physics C> 1999, Vol. 23> Issue(4) : 328-333

The Angular Distributions of intermediate Mass Fragments Emittsd in 30 MeV/u ⁴⁰Ar+^58,64Ni and ¹¹⁵In Reactions

Institute of Modern Physics,The Chinese Academy of sciences, Lanzhou 730000

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Abstract：
The angular distributions of intermediate mass fragments with Z=3-19 emitted in 30 MeV/u ⁴⁰Ar+^58,64Ni and ¹¹⁵In reactions over an angular range of 5°—140°have been measured.Exponential distribution function: dσ/dΩ=N·exp(-θ/a) was used tO fit the measured angular distributions.We have extracted the decay factor a that can be connected with the interaction time τ, and the factor N that is related to the intensity of the emission source.The relationships of a(Z) with Z and N(Z) with Z for different reaction systems and different angular ranges have been discussed. The dependence of angular distributions on isospin and the symmetry of reaction system have also been discussed.

References

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Gou Quanbu, Zhu Yongtai, Xu Hushan, Wei Zhiyong, Lu Jun, Zhang Yuhu, Wang Qi, Li Songlin and Wu Zhongli. The Angular Distributions of intermediate Mass Fragments Emittsd in 30 MeV/u ⁴⁰Ar+^58,64Ni and ¹¹⁵In Reactions[J]. Chinese Physics C, 1999, 23(4): 328-333.

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Received: 1998-05-25
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

The Angular Distributions of intermediate Mass Fragments Emittsd in 30 MeV/u ⁴⁰Ar+^58,64Ni and ¹¹⁵In Reactions

Corresponding author: Gou Quanbu,

Institute of Modern Physics,The Chinese Academy of sciences, Lanzhou 730000

Received Date: 1998-05-25
Accepted Date: 1900-01-01
Available Online: 1999-04-05

Abstract: The angular distributions of intermediate mass fragments with Z=3-19 emitted in 30 MeV/u ⁴⁰Ar+^58,64Ni and ¹¹⁵In reactions over an angular range of 5°—140°have been measured.Exponential distribution function: dσ/dΩ=N·exp(-θ/a) was used tO fit the measured angular distributions.We have extracted the decay factor a that can be connected with the interaction time τ, and the factor N that is related to the intensity of the emission source.The relationships of a(Z) with Z and N(Z) with Z for different reaction systems and different angular ranges have been discussed. The dependence of angular distributions on isospin and the symmetry of reaction system have also been discussed.