Mapping quadrupole collectivity in the Cd isotopes: The breakdown of harmonic vibrational motion

Journal Article · Fri Oct 28 00:00:00 EDT 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3628381· OSTI ID:21612052

Garrett, P E ^[1]; Green, K L; Bangay, J; Varela, A Diaz; Sumithrarachchi, C S; Bandyopadhyay, D S; Bianco, L; Demand, G A; Finlay, P; Grinyer, G F; Leach, K G; Phillips, A A; Schumaker, M A; Svensson, C E; Wong, J ^[1]; Austin, R A. E.; Colosimo, S ^[2]; Ball, G C; Garnsworthy, A B; Hackman, G ^[3]

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1. Department of Physics, University of Guelph, Guelph, Ontario, N1G2W1 (Canada)
2. Department of Astronomy and Physics, Saint Mary's University, Halifax, Nova Scotia, B3H3C3 (Canada)
3. TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T2A3 (Canada)

The stable Cd isotopes have long been used as paradigms for spherical vibrational motion. Extensive investigations with in-beam {gamma} spectroscopy have resulted in very-well-established level schemes, including many lifetimes or lifetime limits. A programme has been initiated to complement these studies with very-high-statistics {beta} decay using the 8{pi} spectrometer at the TRIUMF radioactive beam facility. The decays of {sup 112}In and {sup 112}Ag have been studied with an emphasis on the observation of, or the placement of stringent limits on, low-energy branches between potential multi-phonon levels. A lack of suitable 0{sup +} or 2{sup +} three-phonon candidates has been revealed. Further, the sum of the B(E2) strength from spin 0{sup +} and 2{sup +} states up to 3 MeV in excitation energy to the assigned two-phonon levels falls far short of the harmonic-vibrational expectations. This lack of strength points to the failing of collective models based on vibrational phonon structures.

• OSTI ID: 21612052
• Journal Information: AIP Conference Proceedings, Vol. 1377, Issue 1; Conference: FINUSTAR 3 Conference on frontiers in nuclear structure, astrophysics, and reactions, Rhodes (Greece), 23-27 Aug 2010; Other Information: DOI: 10.1063/1.3628381; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BETA DECAY
BOSONS
CADMIUM ISOTOPES
COLLECTIVE MODEL
E2-TRANSITIONS
ENERGY LEVELS
EXCITATION
HARMONIC OSCILLATORS
IN-BEAM SPECTROSCOPY
INDIUM 112
LIFETIME
MEV RANGE
NUCLEAR POTENTIAL
SILVER 112
SPHERICAL CONFIGURATION
SPIN
VIBRATIONAL STATES
ANGULAR MOMENTUM
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CONFIGURATION
DECAY
ELECTRON CAPTURE RADIOISOTOPES
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
HOURS LIVING RADIOISOTOPES
INDIUM ISOTOPES
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MATHEMATICAL MODELS
MINUTES LIVING RADIOISOTOPES
MULTIPOLE TRANSITIONS
NUCLEAR DECAY
NUCLEAR MODELS
NUCLEI
ODD-ODD NUCLEI
PARTICLE PROPERTIES
POTENTIALS
RADIOISOTOPES
SILVER ISOTOPES
SPECTROSCOPY