Assigning {gamma} deformation from fine structure in exotic nuclei

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

DOI:https://doi.org/10.1063/1.3628367· OSTI ID:21612035

Ferreira, L S ^[1]; Maglione, E ^[2]; Arumugam, P ^[1]

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1. Centro de Fisica das Interaccoes Fundamentais, and Departmento de Fisica, Instituto Superior Tecnico, Avenida Rovisco Pais, P1049-001 Lisbon (Portugal)
2. Dipartimento di Fisica ''G. Galilei'', Via Marzolo 8, I-35131 Padova (Italy) and Istituto Nazionale di Fisica Nucleare, Padova (Italy)

The nonadiabatic quasiparticle model for triaxial shapes is used to perform calculations for decay of {sup 141}Ho, the only known odd-Z even-N deformed nucleus for which fine structure in proton emission from both ground and isomeric states has been observed. All experimental data corresponding to this unique case namely, the rotational spectra of parent and daughter nuclei, decay widths and branching ratios for ground and isomeric states, could be well explained with a strong triaxial deformation {gamma}{approx}20. The recent experimental observation of fine structure decay from the isomeric state, can be explained only with an assignment of I{sup {pi}} = 3/2{sup +} as the decaying state, in contradiction with the previous assignment, of I{sup {pi}} 1/2{sup +}, based on adiabatic calculations. This study reveals that proton emission measurements could be a precise tool to probe triaxial deformations and other structural properties of exotic nuclei beyond the proton dripline.

• OSTI ID: 21612035
• 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: 10.1063/1.3628367; (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
BRANCHING RATIO
DEFORMED NUCLEI
FINE STRUCTURE
GROUND STATES
HOLMIUM 141
ISOMERIC NUCLEI
NUCLEAR DEFORMATION
NUCLEAR STRUCTURE
PARITY
PROTON-EMISSION DECAY
QUADRUPOLE MOMENTS
QUASI PARTICLES
DECAY
DEFORMATION
DIMENSIONLESS NUMBERS
ENERGY LEVELS
HOLMIUM ISOTOPES
INTERMEDIATE MASS NUCLEI
ISOTOPES
MILLISECONDS LIVING RADIOISOTOPES
NUCLEAR DECAY
NUCLEI
ODD-EVEN NUCLEI
PARTICLE PROPERTIES
PROTON DECAY RADIOISOTOPES
RADIOISOTOPES
RARE EARTH NUCLEI