Chin. Phys. Lett.  2006, Vol. 23 Issue (5): 1146-1149    DOI:
Original Articles |
Unusual Threshold Anomaly in the 6Li+208Pb System
ZHANG Chun-Lei1,2;ZHANG Huan-Qiao1,2;LIN Cheng-Jian3;RUAN Ming2;LIU Zu-Hua2;YANG Feng2;WU Xiu-Kun2;ZHOU Ping2;AN Guang-Peng2;JIA Hui-Ming2;WU Zhen-Dong2;XU Xin-Xing2;BAI Chun-Lin1,2
1School of Physics, Peking University, Beijing 100871 2China Institute of Atomic Energy, Beijing 102413
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ZHANG Chun-Lei, ZHANG Huan-Qiao, LIN Cheng-Jian et al  2006 Chin. Phys. Lett. 23 1146-1149
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Abstract The angular distributions of elastic scattering for the 6Li +208Pb system have been measured at several energies around the Coulomb barrier. The parameters of optical potential are extracted by means of a phenomenological optical model analysis. It is found that the real and imaginal potentials show a pronounced energy dependence. The behaviour of the potential at the nearly especially sub-barrier energies in the 6Li+208Pb system is quite different from the results of some previous reports observed in other systems, such as 19F+208Pb and 16O+208Pb. This unusual threshold phenomenon indicates that breakup channel is strongly coupled with the elastic channel and has obvious effects on optical potential.
Keywords: 24.10.Eq      24.10.Ht      25.70.Bc     
Published: 01 May 2006
PACS:  24.10.Eq (Coupled-channel and distorted-wave models)  
  24.10.Ht (Optical and diffraction models)  
  25.70.Bc (Elastic and quasielastic scattering)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2006/V23/I5/01146
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ZHANG Chun-Lei
ZHANG Huan-Qiao
LIN Cheng-Jian
RUAN Ming
LIU Zu-Hua
YANG Feng
WU Xiu-Kun
ZHOU Ping
AN Guang-Peng
JIA Hui-Ming
WU Zhen-Dong
XU Xin-Xing
BAI Chun-Lin
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