Study on the formation of the composite system of <SUP>238</SUP>U+<SUP>238</SUP>U

WU Xi-Zhen; TIAN Jun-Long; ZHAO Kai; ZHANG Ying-Xun; LI Zhu-Xia

doi:10.1088/1674-1137/33/S1/010

Chinese Physics C> 2009, Vol. 33> Issue(S1) : 30-32 DOI: 10.1088/1674-1137/33/S1/010

Study on the formation of the composite system of ²³⁸U+²³⁸U

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Abstract：
Strongly damped reactions of ²³⁸U+²³⁸U, at E_cm= 680—1880 MeV have been studied based on the improved quantum molecular dynamics model. We find that at a certain energy region the entrance channel potential is weakly repulsive and the dissipation is very strong after touching configuration, these two effects make the time delay of re-separation for colliding system. The single particle potential well of the transiently formed composite system has Coulomb barrier about 15—20 MeV high at the surface, which makes the excited unbound protons being still embedded in the potential well and moving in a common mono-single particle potential for a period of time and thus restrains from quick decay of the composite system.

References

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. Zagrebaev V, Greiner W. J. Phys. G: Nucl. Part. Phys.,2005, 31: 8252. Zagrebaev V I, Oganessian Y T, Itkis M G, Greiner W.Phys. Rev. C, 2006, 73: 031602(R)3. WANG N, LI Z X, WU X Z et al. Mod. Phys. Lett. A,2005, 20: 26194. WANG N, LI Z X AND WU X Z. Phys. Rev. C, 2002, 65:0646085. WANG N, LI Z X, WU X Z et al. Phys. Rev. C, 2004, 69:0346086. Papa M, Maruyama T, Bonasera A. Phys. Rev. C, 2001,64: 0246127. WU X Z, Maruhn J, Greiner W. Z. Phys. A, 1989, 334:207

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WU Xi-Zhen, TIAN Jun-Long, ZHAO Kai, ZHANG Ying-Xun and LI Zhu-Xia. Study on the formation of the composite system of ²³⁸U+²³⁸U[J]. Chinese Physics C, 2009, 33(S1): 30-32. doi: 10.1088/1674-1137/33/S1/010

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Received: 2008-10-22
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

Study on the formation of the composite system of ²³⁸U+²³⁸U

Corresponding author: WU Xi-Zhen,

Received Date: 2008-10-22
Accepted Date: 1900-01-01
Available Online: 2009-01-10

Abstract: Strongly damped reactions of ²³⁸U+²³⁸U, at E_cm= 680—1880 MeV have been studied based on the improved quantum molecular dynamics model. We find that at a certain energy region the entrance channel potential is weakly repulsive and the dissipation is very strong after touching configuration, these two effects make the time delay of re-separation for colliding system. The single particle potential well of the transiently formed composite system has Coulomb barrier about 15—20 MeV high at the surface, which makes the excited unbound protons being still embedded in the potential well and moving in a common mono-single particle potential for a period of time and thus restrains from quick decay of the composite system.