Anomalous collective modes in atomic nuclei within the proton-neutron interacting boson model

2025/12/10 by Teng, Wei, Zhang, Yu, Wang, Sheng-Nan +3
Physics and Astronomy · #Nuclear physics research studies #Quantum, superfluid, helium dynamics #Quantum Mechanics and Non-Hermitian Physics

paper · doi:10.48550/arxiv.2512.09272

Abstract

Novel collective modes characterized by a B_4/2 ratio (≡ B(E2;4₁⁺→ 2₁⁺)/B(E2;2₁⁺→ 0₁⁺)) less than 1.0 that were observed recently have been identified within the proton-neutron interacting boson model (IBM-2) using the consistent-Q Hamiltonian. These modes are shown to give rise to triaxial spectral features, including significant band mixing. The results provide a compelling explanation for the deeply suppressed B_4/2 ratio observed in ¹⁶⁶W, ^168,170Os, and ¹⁷²Pt, offering new insights into the B(E2) anomaly phenomenon in neutron-deficient nuclei.

Citations

• Anomalous low-energy E2-related behavior in triaxial nuclei
• Nuclear shell model and interacting bosons

Cited by

• The IBM Description of the B(E2) Anomaly: Dynamical Triaxiality and Configuration Mixing

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