Anomalous collective modes in atomic nuclei within the proton-neutron interacting boson model
Novel collective modes characterized by a B4/2 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 fea...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-06-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269325002485 |
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| Summary: | Novel collective modes characterized by a B4/2 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 B4/2 ratio observed in 166W, 168,170Os, and 172Pt, offering new insights into the B(E2) anomaly phenomenon in neutron-deficient nuclei. |
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| ISSN: | 0370-2693 |