Study Of Collectivity And Non-collectivity Of Odd-odd Nucleus¹⁵⁶Tm

First of all, this thesis, a brief introduction nuclei high-spin state study of thegeneral overview as well as its physical interpretation the basic theory; and then focuson introduction of the beam? spectroscopy and its experimental technology, and onthe basis of this analysis and its discussion of collectivity or non-collectivity ofodd-odd nucleus¹⁵⁶Tm.In the HI-13tandem accelerator at the CIAE, through the heavy-ionfusion-evaporation reaction obtained142Nd （19F,5n）¹⁵⁶Tm （beam energy for122.5MeV）, to study high spin states of¹⁵⁶Tm and measure?-? coincidence, wecalculate the?-transition intensities and DCO values, and so established¹⁵⁶Tm nuclearspin states of the new level scheme, so the original level scheme has made manychanges.6levels and5transitions have been added in the new level scheme.By systematically comparing¹⁵⁶Tm nuclear with near nuclear,¹⁵⁶Tm nuclearare between collectivity and non-collectivity. According to the calculation of theExtended TRS??=0.000⁰.672MeV, deformation parameter2basicallymaintained in the range of0.120to0.165, the deformation is quite small, the nucleusis very close to spherical. By the quasi-particle theory of the empirical shell model,we analysis¹⁵⁶Tm nuclear spin state energy level structure, and gives somequantitative explanation. The results of the2-state to the16-state by the fourquasi-particle empirical shell model calculation are more in line with the experimentalresults. The nuclear data near the¹⁵⁶Tm nuclear are very limited, only the calculationsome level of energy. Infer from the high spin states of N=87odd-odd nucleus all inthe nature of the collective nature of sports and its non-collective motion in thetransition process.