Intermediate-energy Coulomb excitation of 104Sn: Moderate E2 strength decrease approaching 100Sn

Abstract

The reduced transition probability B(E2) of the first excited 2+ state in the nucleus 104Sn was measured via Coulomb excitation in inverse kinematics at intermediate energies. A value of 0.163(26) e^2b^2 was extracted from the absolute cross-section on a Pb target, while the method itself was verified with the stable 112Sn isotope. Our result deviates significantly from the earlier reported value of 0.10(4) e^2b^2 and corresponds to a moderate decrease of excitation strength relative to the almost constant values observed in the proton-rich, even-A 106-114Sn isotopes. Present state-of-the-art shell-model predictions, which include proton and neutron excitations across the N=Z=50 shell closures as well as standard polarization charges, underestimate the experimental findings

References in corpus (7)

• DALI2: A NaI(Tl) detector array for measurements of $\gamma$ rays from fast nuclei
• Z=50 shell gap near ${}^{100}$Sn from intermediate-energy Coulomb excitations in even-mass ${}^{106--112}$Sn isotopes
• A monopole-optimized effective interaction for tin isotopes
• Quadrupole collectivity in neutron-deficient Sn nuclei: \nuc{104}{Sn} and the role of proton excitations
• Global optical potential for nucleus-nucleus systems from 50 MeV/u to 400 MeV/u
• Coulomb excitation of unstable nuclei at intermediate energies
• On the Analysis of Intermediate-Energy Coulomb Excitation Experiments

Cited by in corpus (16)

• Structure of the lightest tin isotopes
• Novel shape evolution in Sn isotopes from magic numbers 50 to 82
• Shell-model study of quadrupole collectivity in light tin isotopes
• The anomalous quadrupole collectivity in Te isotopes
• Occupation probabilities from quadrupole moments in the Sn region
• Pairing-quadrupole interplay in the neutron-deficient tin nuclei: first lifetime measurements of low-lying states in ${}^{106,108}$Sn
• Double-step truncation procedure for large-scale shell-model calculations
• Asymmetric behavior of the B$(E2\uparrow ;0^{+}\to 2^{+})$ values in ${}^{104-130}$Sn and Generalized Seniority
• Electromagnetic Properties of Indium Isotopes Elucidate the Doubly Magic Character of ${}^{100}$Sn
• Quadrupole dominance in the light Sn and in the Cd isotopes
• Spectroscopy of nuclei around ${}^{100}$Sn populated via two-neutron knockout reactions
• Production of the exotic neutron-deficient isotopes near N, Z = 50 in multinucleon transfer reactions
• Shape polarization in the tin isotopes near $N=60$ from precision $g$-factor measurements on short-lived $11/2^{-}$ isomers
• Quadrupole dominance in light Cd and Sn isotopes
• Investigation of the determination of nuclear deformation using high-energy heavy-ion scattering
• Relation between E2 transitions in even--even and odd-mass nuclei