What are the problems in X(5) symmetry in a different mass region from the well established A≈150 region?
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The X(5) symmetry, which describes phase transition and critical point behavior in nuclei, has been well established in the A≈150 region . However, when considering a different mass region, such as A∼80 and A∼100, there are some problems with the X(5) symmetry. In the case of 176,178,180 Os, the lifetimes of the first 2+ states were measured, and the transition quadrupole moments agreed well with the X(5) predictions, supporting an X(5) structure for 178 Os . On the other hand, calculations in a four-dimensional deformation space for 152 Dy and 153 Dy suggest that the experimental observations are not explained by a hyperdeformed shape, but rather show rotational bands with moments of inertia larger than that of the well-known superdeformed band . Therefore, while X(5) symmetry has been successful in the A≈150 region, it faces challenges in different mass regions.
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7 Citations | The paper does not provide information about the problems in X(5) symmetry in a different mass region from the well-established A≈150 region. The paper focuses on the low-spin states and collective structure of 130Ce. |
25 Citations | The paper does not mention any problems with X(5) symmetry in a different mass region from the well-established A≈150 region. |
| The provided paper does not mention any problems with X(5) symmetry in a different mass region from the well-established A≈150 region. |
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