Sizeable mixing between the coexisting normal and intruder structures of 96Zr revealed through lifetime measurements
Abstract
Lifetimes of excited states of the nucleus 96Zr were studied with the Doppler-shift attenuation method following the 94Zr(18O,16O)96Zr two-neutron transfer reaction. The obtained B(E2;2+2→0+2) and B(E2;4+1→2+2) transition strengths, amounting to 26(2) and 39(7)\,W.u., respectively, firmly attribute the 2+2 and 4+1 states to the collective intruder band built on top of the 0+2 state. The nature of this structure is discussed against predictions of the collective model using the Bohr Hamiltonian, the interacting boson model with configuration mixing, and the quasiparticle vacua shell model. The collective, interband B(E2;4+1→2+1)=11.2(8)\,W.u. transition strength, refuting the previously assumed purity of both structures, is reproduced in the calculations. The quasiparticle vacua shell model predicts, in agreement with a simple two-state model based on experimental E2 transition strengths, considerable mixing between the normal and intruder 2+ states.
Versions
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BibTeX
@misc{beck2026sizeable,
title = {{Sizeable mixing between the coexisting normal and intruder structures of $^96$Zr revealed through lifetime measurements}},
author = {T. Beck and T. Stetz and N. Gavrielov and N. Pietralla and V. Werner and K. Yanase and M. Boromiza and A. Coman and C. Costache and N. M. Florea and I. Gheorghe and A. Ionescu and R. Lica and N. Mărginean and R. Mărginean and H. Mayr and C. Mihai and R. E. Mihai and A. Mitu and C. R. Nita and T. Otsuka and O. Papst and S. Pascu and C. Sotty and L. Stan and S. Toma and Y. Tsunoda and A. Turturică and S. Ujeniuc and J. Wiederhold},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.40037},
eprint = {2610.40037},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.40037},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - UNPB
TI - Sizeable mixing between the coexisting normal and intruder structures of ^96Zr revealed through lifetime measurements
AU - T. Beck
AU - T. Stetz
AU - N. Gavrielov
AU - N. Pietralla
AU - V. Werner
AU - K. Yanase
AU - M. Boromiza
AU - A. Coman
AU - C. Costache
AU - N. M. Florea
AU - I. Gheorghe
AU - A. Ionescu
AU - R. Lica
AU - N. Mărginean
AU - R. Mărginean
AU - H. Mayr
AU - C. Mihai
AU - R. E. Mihai
AU - A. Mitu
AU - C. R. Nita
AU - T. Otsuka
AU - O. Papst
AU - S. Pascu
AU - C. Sotty
AU - L. Stan
AU - S. Toma
AU - Y. Tsunoda
AU - A. Turturică
AU - S. Ujeniuc
AU - J. Wiederhold
PY - 2026
DA - 2026/10/29
PB - arXiv
DO - 10.48550/arxiv.2610.40037
UR - https://arxiv.org/abs/2610.40037
AB - Lifetimes of excited states of the nucleus ^96Zr were studied with the Doppler-shift attenuation method following the ^94Zr(^18O,^16O)^96Zr two-neutron transfer reaction. The obtained B(E2;2^+_2→0^+_2) and B(E2;4^+_1→2^+_2) transition strengths, amounting to 26(2) and 39(7)\,W.u., respectively, firmly attribute the 2^+_2 and 4^+_1 states to the collective intruder band built on top of the 0^+_2 state. The nature of this structure is discussed against predictions of the collective model using the Bohr Hamiltonian, the interacting boson model with configuration mixing, and the quasiparticle vacua shell model. The collective, interband B(E2;4^+_1→2^+_1)=11.2(8)\,W.u. transition strength, refuting the previously assumed purity of both structures, is reproduced in the calculations. The quasiparticle vacua shell model predicts, in agreement with a simple two-state model based on experimental E2 transition strengths, considerable mixing between the normal and intruder 2^+ states.
ER -