The collective properties of even-even 164-174W isotopes

الملخص EN

Ground states bands (GSB) and negative parity band (NPB) of (_ ^(164-174))W isotopes have been calculated.

Bohr-Mottelson (BM), Interacting boson approximation-1(IBM-1) and Interacting vector boson model (IVBM) were used for this purpose.

The principal excited state ( ) and the proportion of the second to the primary excited state (R_(4⁄2)=(〖E4〗_1^+)⁄(〖E2〗_1^+ )) provide primary information about the properties of the nucleus.

The ratio of the gamma energy, over spin E_γ⁄J of each state as a function of the angular momentum (J) (E-GOS), has been assessed to decide the ground states property of each nucleus.

The ratio of energies of (J+2) and (J), states as a function of the angular momentum (J), have been attracted to decide numerically the properties of the ground states band of all states and all nuclei.

The ΔJ=1 staggering between octupole band and ground state band is found to display a beat pattern as a function of angular momentum (J).

The methods which were used, showed the transitional U(5)-O(6) properties of (_^(164-166))W, the general properties that U(5)-O(6)-SU(3) of (_^168)W, and the transitional properties O(6)-SU(3) of (_^(170-172))W; while (_^174)W showed the SU(3) properties.