原子核的球形到軸對(duì)稱形量子相變.pdf

1、遼寧師范大學(xué)碩士學(xué)位論文原子核的球形到軸對(duì)稱形量子相變姓名：劉琳申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：理論物理指導(dǎo)教師：戴連榮2012墅墮塑型翌型塾型豎量塑鑾TheshapephasetransitionfromthenucleisphericaltoaxiallydeformedAbstractWestudythesphericaltoaxiallydeformedshapephasetransitionintheinteractingbosonm

2、odelbyreplacingthesu(3)quadrupole—quadrupoleinteractionwiththeO(6)cubicinterac—tionFirstlysomelow—lyingenergylevelssuchas0，2，4，andtheirratiossuchasJF站2，R42aregiveninthetwoschemesTheresultsshowthatthereexistsimilartransit

3、ionbehaviorinthetwoschemesHoweverthetransitionbehaviorissmootherinthenewschemethanthoseoftraditionalschemeSecondlytheisomershiftsof2aregiveninthetwoschemesTheoveralltrendoftheisomershiftsareveryclose，buttheresultwiththe0

4、(6)cubicinteractionissmootherthanthoseofthesu(3)quadrupole—quadrupoleinteractionThirdlysomeB(E2)transitionratiosarealsogiveninthetwoschemesTheresultsshowthatthetransitionalbehaviorsareverysimilarinthetwoschemes，bothunder

5、gonoticeablechangeswithinthecoexistenceregionindicatingtheshapephasetransitionHoweverthetran—sitionbehaviorismoresmootherinthenewschemethanthoseoftraditionalschemeFinallytheBohrvariableandcorrespondingexpectationvaluesar

6、ealsoinvestigatedTheresultsshowthenucleiwiththeSU(3)quadrupole—quadrupoleinteractionisrigid，whilethenucleiwith0(6)cubicinteractionissofterInsummarythetransitionbehaviorfromthesphericaltoaxiallydeformedshapephasetransitio

7、ncanbedescribedbothinthenewschemewiththe0(61cubicinteractionandinthetraditionalschemewithsu(a)quadrupole—quadrupoleinteractionInthenewschemethetransitionbehaviorismoresmootherthanthoseoftraditionalschemeKeywords：quantums