The γ decays from an isomeric 10+ state at 6457 keV in the nucleus 2854Ni26 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 2654Fe28. 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.
Isospin symmetry and proton decay: Identification of the 10+ isomer in 54Ni
LENZI, SILVIA MONICA
2008
Abstract
The γ decays from an isomeric 10+ state at 6457 keV in the nucleus 2854Ni26 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 2654Fe28. 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.File in questo prodotto:
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