Emission Time of Light Particles with Respect to Measurement Angle

LIU Yong-Ying; WANG Su-Fang; DUAN Li-Min; JIN Gen-Ming; ZHU Hai-Dong; ZHANG Bao-Guo; WEN Wan-Xin; LI Zu-Yu; HE Zhi-Yong; WANG Hong-Wei; XIAO Zhi-Gang; WU He-Yu; WEI Zhi-Yong

Chinese Physics C> 2001, Vol. 25> Issue(11) : 1065-1070

Emission Time of Light Particles with Respect to Measurement Angle

Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China

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Abstract：
Particle particle correlation functions at small correlation angle have been measured for ⁴⁰Ar+⁹³Nb collision at E 25MeV/u. Based on three body trajectory calculation the emission time scale of light particles has been extracted from correlation function of two particles at small relative momentum. The mean emission time scale decreases with increasing sum of the kinetic energies of the particles in a correlated pair. It decreases from about 500 fm/c for low energy particles to about 50 fm/c for high energy particles. And the extracted emission time scales from larger detection angle are longer than that extracted from the data obtained at small detection angle, which can be explained as the more particles emitted from equilibrated system.

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LIU Yong-Ying, WANG Su-Fang, DUAN Li-Min, JIN Gen-Ming, ZHU Hai-Dong, ZHANG Bao-Guo, WEN Wan-Xin, LI Zu-Yu, HE Zhi-Yong, WANG Hong-Wei, XIAO Zhi-Gang, WU He-Yu and WEI Zhi-Yong. Emission Time of Light Particles with Respect to Measurement Angle[J]. Chinese Physics C, 2001, 25(11): 1065-1070.

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Received: 2001-11-28
Revised: 1900-01-01

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通讯作者: 陈斌, [email protected]

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沈阳化工大学材料科学与工程学院沈阳 110142

Emission Time of Light Particles with Respect to Measurement Angle

Corresponding author: LIU Yong-Ying,

Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China

Received Date: 2001-11-28

Accepted Date: 1900-01-01

Available Online: 2001-11-05

Abstract: Particle particle correlation functions at small correlation angle have been measured for ⁴⁰Ar+⁹³Nb collision at E 25MeV/u. Based on three body trajectory calculation the emission time scale of light particles has been extracted from correlation function of two particles at small relative momentum. The mean emission time scale decreases with increasing sum of the kinetic energies of the particles in a correlated pair. It decreases from about 500 fm/c for low energy particles to about 50 fm/c for high energy particles. And the extracted emission time scales from larger detection angle are longer than that extracted from the data obtained at small detection angle, which can be explained as the more particles emitted from equilibrated system.

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Emission Time of Light Particles with Respect to Measurement Angle

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