Mapping quadrupole collectivity in the Cd isotopes: The breakdown of harmonic vibrational motion
Abstract
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.
- Authors:
-
- Department of Physics, University of Guelph, Guelph, Ontario, N1G2W1 (Canada)
- Department of Astronomy and Physics, Saint Mary's University, Halifax, Nova Scotia, B3H3C3 (Canada)
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T2A3 (Canada)
- Publication Date:
- OSTI Identifier:
- 21612052
- Resource Type:
- Journal Article
- Journal Name:
- AIP Conference Proceedings
- Additional Journal Information:
- Journal Volume: 1377; Journal 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); Journal ID: ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 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
Citation Formats
Garrett, P E, TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T2A3, 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, Austin, R A. E., Colosimo, S, Ball, G C, Garnsworthy, A B, and Hackman, G. Mapping quadrupole collectivity in the Cd isotopes: The breakdown of harmonic vibrational motion. United States: N. p., 2011.
Web. doi:10.1063/1.3628381.
Garrett, P E, TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T2A3, 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, Austin, R A. E., Colosimo, S, Ball, G C, Garnsworthy, A B, & Hackman, G. Mapping quadrupole collectivity in the Cd isotopes: The breakdown of harmonic vibrational motion. United States. https://doi.org/10.1063/1.3628381
Garrett, P E, TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T2A3, 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, Austin, R A. E., Colosimo, S, Ball, G C, Garnsworthy, A B, and Hackman, G. 2011.
"Mapping quadrupole collectivity in the Cd isotopes: The breakdown of harmonic vibrational motion". United States. https://doi.org/10.1063/1.3628381.
@article{osti_21612052,
title = {Mapping quadrupole collectivity in the Cd isotopes: The breakdown of harmonic vibrational motion},
author = {Garrett, P E and TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T2A3 and Green, K L and Bangay, J and Varela, A Diaz and Sumithrarachchi, C S and Bandyopadhyay, D S and Bianco, L and Demand, G A and Finlay, P and Grinyer, G F and Leach, K G and Phillips, A A and Schumaker, M A and Svensson, C E and Wong, J and Austin, R A. E. and Colosimo, S and Ball, G C and Garnsworthy, A B and Hackman, G},
abstractNote = {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.},
doi = {10.1063/1.3628381},
url = {https://www.osti.gov/biblio/21612052},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1377,
place = {United States},
year = {Fri Oct 28 00:00:00 EDT 2011},
month = {Fri Oct 28 00:00:00 EDT 2011}
}