Search for neutron excitations across the N=20 shell gap in $^{25-29}$Ne

Abstract : Nuclear structure of the neutron rich $^{25-29}$Ne nuclei has been investigated through the in-beam $\gamma$-ray spectroscopy technique using fragmentation reactions of both stable and radioactive beams. Level schemes have been deduced for these Ne isotopes. In order to examine the importance of intruder $fp$ configurations, they are compared to shell model calculations performed either in the restricted sd or in the larger $sdpf$ valence space. The $^{25,26}$Ne and ${27}$Ne nuclei were found to be in agreement with the $sd$ shell model calculations, whereas $^{28}$Ne exhibits signatures of the intruder $fp$ shell contribution.
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http://hal.in2p3.fr/in2p3-00025120
Contributor : Michel Lion <>
Submitted on : Thursday, November 24, 2005 - 2:34:59 PM
Last modification on : Tuesday, May 14, 2019 - 10:01:59 AM

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M. Belleguic, F. Azaiez, Zs. Dombrádi, D. Sohler, M.J. Lopez-Jimenez, et al.. Search for neutron excitations across the N=20 shell gap in $^{25-29}$Ne. Physical Review C, American Physical Society, 2005, 72, pp.054316. ⟨10.1103/PhysRevC.72.054316⟩. ⟨in2p3-00025120⟩

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