Low-lying dipole excitations in vibrational nuclei: The Cd isotopic chain studied in photon scattering experiments

Journal Article · Thu Sep 01 04:00:00 EDT 2005 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.72.034302· OSTI ID:20698971

Kohstall, C; Belic, D; Kneissl, U; Nord, A; Pitz, H H; Scheck, M; Stedile, F ^[1]; Brentano, P von; Fransen, C; Gade, A; Herzberg, R -D; Jolie, J; Linnemann, A; Pietralla, N; Werner, V ^[2]; Yates, S W ^[3]

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1. Institut fuer Strahlenphysik, Universitaet Stuttgart, D-70569 Stuttgart (Germany)
2. Institut fuer Kernphysik, Universitaet zu Koeln, D-50937 Cologne (Germany)
3. Departments of Chemistry and Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506-0055 (United States)

High-resolution nuclear resonance fluorescence experiments (NRF) were performed on {sup 110,111,112,114,116}Cd at the bremsstrahlung facility of the 4.3-MV Dynamitron accelerator in Stuttgart to study the low-lying dipole strength distributions in these vibrational nuclei. Numerous excited states, most of them previously unknown, were observed in the excitation energy range up to 4 MeV. Detailed spectroscopic information has been obtained on excitation energies, spins, decay widths, decay branchings, and transition probabilities. For states in the even-even isotopes {sup 110,112,114,116}Cd, parities could be assigned from linear polarization measurements. Together with our previous results for {sup 108,112,113,114}Cd from NRF studies without polarization measurements, systematics was established for the dipole strength distributions of the stable nuclei within the Cd isotopic chain. The results are discussed with respect to the systematics of E1 two-phonon excitations and mixed-symmetry states in even-even nuclei near the Z=50 shell closure and the fragmentation of these excitation modes in the odd-mass Cd isotopes.

• OSTI ID: 20698971
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 3 Vol. 72; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BRANCHING RATIO
CADMIUM 110
CADMIUM 112
CADMIUM 114
CADMIUM 116
DIPOLES
E1-TRANSITIONS
EXCITATION
MEV RANGE
NUCLEAR DECAY
PARITY
PHONONS
PHOTON-NUCLEON INTERACTIONS
PHOTONS
POLARIZATION
RESCATTERING
RESONANCE FLUORESCENCE
RESONANCE SCATTERING
SPIN
VIBRATIONAL STATES