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INFLUENCES OF THE ISOSPIN-DEPENDENCE OF IN-MEDIUM NUCLEON–NUCLEON CROSS-SECTION AND MOMENTUM DEPENDENT INTERACTION ON ISOSCALING PARAMETER

Institute of Modern Physics, Chinese Academy of Sciences, P.O. Box 31, Lanzhou 730000, P. R. China

Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator Lanzhou 730000, P. R. China

Institute of Basic Physics, College of Mathematics-Physics and Information, Tianshui Normal University, Gansu, Tianshui 741000, P. R. China

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HUAN FENG HAO

Institute of Modern Physics, Chinese Academy of Sciences, P.O. Box 31, Lanzhou 730000, P. R. China

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YONG ZHONG XING

Institute of Modern Physics, Chinese Academy of Sciences, P.O. Box 31, Lanzhou 730000, P. R. China

Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator Lanzhou 730000, P. R. China

Institute of Basic Physics, College of Mathematics-Physics and Information, Tianshui Normal University, Gansu, Tianshui 741000, P. R. China

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WEI ZUO

Institute of Modern Physics, Chinese Academy of Sciences, P.O. Box 31, Lanzhou 730000, P. R. China

Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator Lanzhou 730000, P. R. China

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, and

XI GUO LEE

Institute of Modern Physics, Chinese Academy of Sciences, P.O. Box 31, Lanzhou 730000, P. R. China

Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator Lanzhou 730000, P. R. China

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https://doi.org/10.1142/S0218301308010052Cited by:3 (Source: Crossref)

Abstract

Influences of the isospin-dependent in-medium nucleon–nucleon cross-section and momentum-dependent interaction (MDI) on the isoscaling parameter α are investigated for two central collisions ⁴⁰Ca + ⁴⁰Ca and ⁶⁰Ca + ⁶⁰Ca. These collisions are with isospin dependent quantum molecular dynamics in the beam energy region from 40 to 60 MeV/nucleon. The isotope yield ratio R₂₁(N, Z) for the above two central collisions depends exponentially on the neutron number N and proton number Z of isotopes, with an isoscaling. In particular, the isospin-dependent and MDI induce an obvious decrease of the isoscaling parameter α. The mechanism of the decreases of α by both and MDI are studied respectively.

Keywords:

PACS: 25.70.pg

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