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Gamma-ray spectroscopy in the vicinity of 68Ni and 100Sn using the EXOGAM array

Abstract : EXOGAM is installed at GANIL since 2001 and is extensively used in the various experimental areas. In the last years, we have a performed a serie of experiments using deep inelastic reactions in inverse kinematics. Excited states in neutron rich nuclei around 68Ni have been studied using the EXOGAM array in coincidence with the VAMOS large acceptance spectrometer. The evolution of collectivity has been studied in some details using lifetime measurements performed with the Koln plunger device. New results in iron isotopes toward N=40 will be presented. The discussion on the nature of the low-lying states in this mass region will be extended to odd-A cobalt isotopes where a very rich variety of structures has been observed including collective, single-particle and core coupled states. The observations have been compared to large scale shell-model calculations performed with the available interactions and the results seem to indicate some deficiencies in the current calculations. In another experiment aiming at studying both the prompt and the delayed gamma-rays, we have also obtained new results in the semi-magic 68Ni. These new results will be presented and discussed in some details. On the other side of the Segré chart, the evolution of the level structure as a function of isospin has been studied in detail. The experimental results obtained with EXOGAM coupled to the Neutron Wall and the DIAMANT charged particle array have been compared with shell model calculations. This detailed analysis allows us to discuss the possible role of T=0 pairing in the N=Z=46 palladium nucleus.
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http://hal.in2p3.fr/in2p3-00610090
Contributor : Michel Lion <>
Submitted on : Thursday, July 21, 2011 - 9:45:51 AM
Last modification on : Thursday, February 1, 2018 - 1:34:20 AM

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  • HAL Id : in2p3-00610090, version 1

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G. de France. Gamma-ray spectroscopy in the vicinity of 68Ni and 100Sn using the EXOGAM array. International Symposium on Frontier of Gamma-ray Spectroscopy (Gamma11), Jun 2011, Saitama, Japan. ⟨in2p3-00610090⟩

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