The γ-decay of the and 2p inner-hole states in 111Sn via the 112Sn(3He, αγ) reaction at 32 MeV |
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Authors: | F. Azaiez S. Fortier S. Galès E. Hourani J.M. Maison J. Kumpulainen J.P. Schapira |
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Affiliation: | IPN-Orsay, BP 1, 91406 Orsay Cedex, France |
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Abstract: | The γ-decay of the deeply-bound hole states in 111Sn has been investigated at 32 MeV incident energy by means of the 112Sn(3He, αγ) reaction. The α-particles emitted near 0° were detected in a Si counter located at the image plan of the superconducting solenoidal spectrometer SOLENO. The γ-rays in coincidence with the α-particles were detected by two Ge(Li) detectors located at 90° and 142° with respect to the beam direction, respectively. Energies, spins and decay schemes have been established for the low-lying states up to 2.5 MeV excitation energy in 111Sn. The γ-decay of the broad bump, located around 4.2 MeV and previously attributed to neutron pick-up from the inner neutron. Subshells, reveals the importance of quasiparticle-phonon m the spreading mechanism of the inner-hole strengths. The and 2p strength functions have been deduced from the α-decay of the enhanced structures (3 ≦ Ex≦ 8 MeV). They are compared to the ones measured in previous inclusive neutron pick-up experiments and to those calculated in the framework of the quasiparticle-phonon nuclear model. |
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Keywords: | Nuclear reactions |
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