Low-energy collective structure of 92,94Zr and 94Mo from (e,e′) and (p,p′) scattering II. Signatures of mixed-symmetry states and origin of collectivity
Abstract
This is the second of two papers discussing a new experimental signature of mixed-symmetry states (MSS) in the vibrational nuclei 92,94Zr and 94Mo based on proton and neutron transition densities. Quasiparticle-phonon model calculations for these nuclei are extensively tested by comparison to ground-state properties, energies and moments of excited states, transition probabilities between them, and the momentum transfer dependence in (e,e′) and (p,p′) reactions. The overall very good agreement permits the extraction of information on the wave functions of the MSS and their fully symmetric (FSS) counterparts. MSS can be identified by a sign change between the leading proton and neutron two-quasiparticle configurations compared to the FSS. Possible candidates for 2+, 3-, and 4+ MSS are identified. The modification of proton and neutron transition densities, which can be derived from a combined analysis of inelastic electron and proton scattering, by the sign change provide a new experimental signature of MSS. The collectivity of ground-state excitations of predominantly one-phonon FSS and MSS is generated to a large extent by the coupling to high-lying states forming giant resonances with the same spin and parity.
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BibTeX
@misc{walz2026lowenergy,
title = {{Low-energy collective structure of $^92,94$Zr and $^94$Mo from ($e,e^\prime$) and ($p,p^\prime$) scattering II. Signatures of mixed-symmetry states and origin of collectivity}},
author = {C. Walz and L. M. Donaldson and P. von Neumann-Cosel and N. Pietralla and F. D. Smit},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.13913},
eprint = {2609.13913},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.13913},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Low-energy collective structure of ^92,94Zr and ^94Mo from (e,e^′) and (p,p^′) scattering II. Signatures of mixed-symmetry states and origin of collectivity
AU - C. Walz
AU - L. M. Donaldson
AU - P. von Neumann-Cosel
AU - N. Pietralla
AU - F. D. Smit
PY - 2026
DA - 2026/09/12
PB - arXiv
DO - 10.48550/arxiv.2609.13913
UR - https://arxiv.org/abs/2609.13913
AB - This is the second of two papers discussing a new experimental signature of mixed-symmetry states (MSS) in the vibrational nuclei ^92,94Zr and ^94Mo based on proton and neutron transition densities. Quasiparticle-phonon model calculations for these nuclei are extensively tested by comparison to ground-state properties, energies and moments of excited states, transition probabilities between them, and the momentum transfer dependence in (e,e^′) and (p,p^′) reactions. The overall very good agreement permits the extraction of information on the wave functions of the MSS and their fully symmetric (FSS) counterparts. MSS can be identified by a sign change between the leading proton and neutron two-quasiparticle configurations compared to the FSS. Possible candidates for 2^+, 3^-, and 4^+ MSS are identified. The modification of proton and neutron transition densities, which can be derived from a combined analysis of inelastic electron and proton scattering, by the sign change provide a new experimental signature of MSS. The collectivity of ground-state excitations of predominantly one-phonon FSS and MSS is generated to a large extent by the coupling to high-lying states forming giant resonances with the same spin and parity.
ER -