Measurement of Angular Cross Correlation of the Cross Section Fluctuation in Dissipative Collision <SUP>27</SUP>Al+<SUP>27</SUP>Al

HU PengYun; WANG Qi; TIAN WenDong; LI SongLin; LU Jun

Chinese Physics C> 2000, Vol. 24> Issue(2) : 119-124

Measurement of Angular Cross Correlation of the Cross Section Fluctuation in Dissipative Collision ²⁷Al+²⁷Al

Institute of Modern Physics, The Chinese Academy of Science, Lanzhou 730000, China1 Istituto Nazionale di Fisica Nucleare, Laboratori Nazionale del Sud Catinia, Italy2 Istituto Nazionale di Fisica Nucleare, Sezione di Catania, Italy3 Dipartimento di Fisica, Universita di Catania, Italy4 Centre de Recherches Nucleaires, Strasbourg, France

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The excitation function was measured from θ_lab=10.4° to 57.4° in dissipative collision ²⁷Al+²⁷Al with incident energy ranging from 114 to 123 MeV in step of 200 keV. The Angular-cross Correlation Functions (ACFs) of cross section fluctuation within large angle region were obtained through experiment for the first time. It is found that the angular coherent width is at least 40°. It is interesting that the ACFs is not simple bell shape but shows strong asymmetry. The over-all behavior is that ACF varies more quickly for the backward angles. Itis also noticed that the cross section fluctuation in the forward angle region (θ_cm<70°) shows much stronger angular coherence than in the backward angle region (θ_cm>70°). This angular dependence may be attributed to the coherent rotation effect of intermediate dinuclear system.

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HU PengYun, WANG Qi, TIAN WenDong, LI SongLin and LU Jun. Measurement of Angular Cross Correlation of the Cross Section Fluctuation in Dissipative Collision ²⁷Al+²⁷Al[J]. Chinese Physics C, 2000, 24(2): 119-124.

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Received: 1998-12-01
Revised: 1900-01-01

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Measurement of Angular Cross Correlation of the Cross Section Fluctuation in Dissipative Collision ²⁷Al+²⁷Al

Corresponding author: HU PengYun,

Institute of Modern Physics, The Chinese Academy of Science, Lanzhou 730000, China1 Istituto Nazionale di Fisica Nucleare, Laboratori Nazionale del Sud Catinia, Italy2 Istituto Nazionale di Fisica Nucleare, Sezione di Catania, Italy3 Dipartimento di Fisica, Universita di Catania, Italy4 Centre de Recherches Nucleaires, Strasbourg, France

Received Date: 1998-12-01

Accepted Date: 1900-01-01

Available Online: 2000-02-05

Abstract: The excitation function was measured from θ_lab=10.4° to 57.4° in dissipative collision ²⁷Al+²⁷Al with incident energy ranging from 114 to 123 MeV in step of 200 keV. The Angular-cross Correlation Functions (ACFs) of cross section fluctuation within large angle region were obtained through experiment for the first time. It is found that the angular coherent width is at least 40°. It is interesting that the ACFs is not simple bell shape but shows strong asymmetry. The over-all behavior is that ACF varies more quickly for the backward angles. Itis also noticed that the cross section fluctuation in the forward angle region (θ_cm<70°) shows much stronger angular coherence than in the backward angle region (θ_cm>70°). This angular dependence may be attributed to the coherent rotation effect of intermediate dinuclear system.

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Measurement of Angular Cross Correlation of the Cross Section Fluctuation in Dissipative Collision ²⁷Al+²⁷Al

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Measurement of Angular Cross Correlation of the Cross Section Fluctuation in Dissipative Collision 27Al+27Al

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Measurement of Angular Cross Correlation of the Cross Section Fluctuation in Dissipative Collision ²⁷Al+²⁷Al

Measurement of Angular Cross Correlation of the Cross Section Fluctuation in Dissipative Collision ²⁷Al+²⁷Al