Journal ArticleDOI
B(E2) values in 150Nd and the critical point symmetry X(5).
R. Krücken,B. Albanna,C. Bialik,R. F. Casten,J. R. Cooper,A. Dewald,N. V. Zamfir,N. V. Zamfir,C. J. Barton,C. W. Beausang,Mark A. Caprio,A. A. Hecht,T. Klug,J. R. Novak,Norbert Pietralla,Norbert Pietralla,P. von Brentano +16 more
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TLDR
Very good agreement was observed between the parameter-free (apart from scale) X(5) predictions and the low-spin level scheme of 150Nd, revealing this as the best case thus far for the realization of the X( 5) symmetry.Abstract:
Lifetimes of states in 150Nd were measured using the recoil distance method following Coulomb excitation of 150Nd by a 132 MeV 32S beam. The experiment was performed at the Yale Tandem accelerator, employing the SPEEDY gamma-ray detector array and the New Yale Plunger Device. Reduced transition probabilities in 150Nd are compared to the predictions of the critical point symmetry X(5) of the phase/shape transition that occurs for the N = 90 rare earth isotones. Very good agreement was observed between the parameter-free (apart from scale) X(5) predictions and the low-spin level scheme of 150Nd, revealing this as the best case thus far for the realization of the X(5) symmetry.read more
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Journal ArticleDOI
Quantum phase transitions in the shapes of atomic nuclei
TL;DR: In this article, the evolution of the nuclear ground-state shapes across the NxZ plane is discussed, and specific data indicating sudden structural changes in various isotopic and isotonic chains of medium-mass and heavy even-even nuclei, as well as diverse theoretical aspects of the models used to describe these changes.
Journal ArticleDOI
Z(5): critical point symmetry for the prolate to oblate nuclear shape phase transition
TL;DR: In this article, a critical point symmetry for the prolate to oblate shape phase transition is introduced, starting from the Bohr Hamiltonian and approximately separating variables for γ = 30°.
Journal ArticleDOI
Shape phase transitions and critical-point phenomena in atomic nuclei
TL;DR: The concept of critical point symmetries as mentioned in this paper was introduced to describe the structure of nuclei at phase-transitional points, which is not of the usual thermodynamic type, but rather they are quantum phase transitions in the equilibrium shape and structure of the ground and low-lying states.
Journal ArticleDOI
Quantum phase transitions in the interacting boson model
Pavel Cejnar,J. Jolie +1 more
TL;DR: In this article, a review of various properties of quantum phase transitions (QPTs) in the Interacting Boson Model (IBM) of nuclear structure is presented, and the most important fields of the present interest are the coexistence of first and second-order phase transitions supports studies related to the microscopic origin of the QPT phenomena.
Journal ArticleDOI
Quantum phase transitions and structural evolution in nuclei
R. F. Casten,E. A. McCutchan +1 more
TL;DR: In this article, the critical point symmetries (CPS) X (5) and E(5) are compared to the data in a number of nuclei and mass regions.