First experimental evidence for two-phonon octupole-[gamma]-vibrational excitations in deformed nuclei

Journal Article · Mon Oct 04 00:00:00 EDT 1993 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.71.2180· OSTI ID:6050544

Kneissl, U; Zilges, A; Margraf, J; Bauske, I; von Brentano, P; Friedrichs, H; Heil, R D; Herzberg, R; Pitz, H H; Schlitt, B; Wesselborg, C ^[1]

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1. Institut fuer Strahlenphysik, Universitaet Stuttgart, 70569 Stuttgart (Germany) Institut fuer Kernphysik, Universitaet zu Koeln, 50937 Koeln (Germany) Institut fuer Kernphysik, Universitaet Giessen, 35392 Giessen (Germany)

Systematic nuclear resonance fluorescence experiments, including model independent parity determinations, provided evidence for enhanced [ital E]1 excitations near 2.5 MeV excitation energy in the deformed nuclei [sup 150]Nd, [sup 160]Gd, and [sup 162,164]Dy. The corresponding [ital J][sup [pi]]=1[sup [minus]] states are interpreted as two-phonon excitations due to the coupling of octupole ([ital J]=3[sup [minus]],[ital K]=1) and quadrupole [gamma] vibrations ([ital J]=2[sup +],[ital K]=2). The results can be explained in the framework of the [ital sdf] interacting-boson-approximation model and the dynamic collective model describing octupole vibrations and their coupling to quadrupole vibrations in deformed nuclei.

• OSTI ID: 6050544
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 71:14; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

663110* -- General & Average Properties of Nuclei & Nuclear Energy Levels-- (1992-)
663220 -- Electromagnetic Transitions-- (1992-)
663410 -- Photonuclear Reactions & Photon Scattering-- (1992-)
663570 -- Nuclear Mass Ranges-- A=150-189-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BRANCHING RATIO
DEFORMED NUCLEI
DYSPROSIUM 162
DYSPROSIUM 164
DYSPROSIUM ISOTOPES
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
EXCITATION
EXCITED STATES
GADOLINIUM 160
GADOLINIUM ISOTOPES
INTERACTING BOSON MODEL
INTERMEDIATE MASS NUCLEI
ISOTOPES
MATHEMATICAL MODELS
MULTIPOLES
NEODYMIUM 150
NEODYMIUM ISOTOPES
NUCLEAR MODELS
NUCLEI
OCTUPOLES
PHONONS
QUADRUPOLES
QUASI PARTICLES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SHELL MODELS
STABLE ISOTOPES
VIBRATIONAL STATES