Isospin Symmetry and Proton Decay: Identification of the 10+ Isomer in 54Ni

Summary, in English

The gamma decays from an isomeric 10+ state at 6457 keV in the nucleus 54Ni have been identified using the GSI fragment separator in conjunction with the RISING Ge-detector array. The state is interpreted as the isobaric analog of the 6527-keV 10+ isomer in 54Fe. The results are discussed in terms of isospin-dependent shell-model calculations. Clear evidence is presented for a discrete l = 5 proton decay branch into the first excited 9/2- state of the daughter 53Co. This decay is the first of its kind observed following projectile fragmentation reactions.

• Author: Dirk Rudolph; Robert Hoischen; Margareta Hellström; S. Pietri; Zs. Podolyák; P. H. Regan; A. B. Garnsworthy; S. J. Steer; F. Becker; P. Bednarczyk; L. Caceres; P. Doornenbal; J. Gerl; M. Górska; J. Grebosz; I. Kojouharov; N. Kurz; W. Prokopowicz; H. Schaffner; H. J. Wollersheim; Lise-Lotte Andersson; L. Atanasova; D. L. Balabanski; M. A. Bentley; A. Blazhev; C. Brandau; J. R. Brown; Claes Fahlander; Emma Johansson; A. Jungclaus; S. M. Lenzi
• Department/s: Nuclear physics; Dept of Physical Geography and Ecosystem Science
• Publishing year: 2008
• Language: English
• Publication/Series: Physical Review C (Nuclear Physics)
• Volume: 78
• Issue: 2
• Links: http://dx.doi.org/10.1103/PhysRevC.78.021301
• Document type: Journal article
• Publisher: American Physical Society
• Topic: Subatomic Physics
• Status: Published
• Project: Isotope-selective Spectroscopy: Fast Timing R&D and fp-Shell Mirror Isomers
• Research group: Nuclear Structure
• ISBN/ISSN/Other: ISSN: 0556-2813