Oscillatory Behavior Of Interparticle Potential In Nuclear Matter And Liquid-gas Transition

The study of phase transition of nuclear matter is paid much attention in theoretical nuclear physics,It also plays an important role in the study of QGP matter,As we all know,there is a liquid-gas transition at 14 Mev-20 Mev in nuclear matter,A brief analysis is draw out P-V figure according to QHD-I model,in this figure we find out there is a liquid-gas phase at certain temperature,However,the basic character of liquid and gas is not investigated,We know the difference of liquid and gas is lied in short-range order and complete disorder。This can be showed out by Radical distribution function。The Radical distribution function is probability of finding two.particles at a distance r from each other,which can be related to the potential of mean force by a simple form。This thesis focuses on oscillatory behavior of interparticle potential in nuclear matter and liquid-gas transition。There are two frameworks for studying nuclear matter at finite temperature and finite density:the temperature field theory and the QHD-I model,In the second chapter finite temperature field theory is introduced,Which has two forms:imagery time and real time formalisms,QHD-I model named Walecka model is introduced,and mean field method is reviewed to solve equations of QHD-I model,In the third part,based on QHD-I model, we calculate the self-energy ofσandωmesons,from this,we can get oscillatory behavior of inter-particle potential,and also the Radical distribution function。The result indicates that nuclear matter below T=16 Mev is showed short-range order,which imply characteristics of liquid,and above T=16 Mev is showed.completely disordered,which imply characteristics of gas,So,this paper distinguishes the liquid and gas phases of nuclear matter from the characteristic element of the phase structure for nuclear matter。...