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High-spin shell model states in neutron-rich Sn isotopes. Ischia Conference. Research on the Sn isotopes. A breakthrough happen when deep-inelastic heavy ion reactions w ere apply for spectroscopy experiments. The first used reaction was: 76 Ge + 124 Sn.

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Ischia Conference

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  1. High-spin shell model states in neutron-rich Sn isotopes Ischia Conference

  2. Research on the Sn isotopes • A breakthrough happen when deep-inelastic heavy ion reactions were apply for spectroscopyexperiments.The first used reaction was: 76Ge + 124Sn • In a series of experiments the (h11/2)n 10+ and 27/2- isomeric states were identified in isotopesrange to128Sn. S. Pietriet al., Phys. Rev. C 83, 044328 (2011) N. Fotiadeset al., Phys. Rev. C 84, 054310 (2011) A. Astieret al., Phys.Rev. C 85, 054316 (2012) R. Brodaet al., Phys. Rev. Lett. 68, 16710 (1992) …….. …….. C. T. Zhang et al.,Phys. Rev. C 62, 057305 (2000) Ischia Conference

  3. Research on the Sn isotopes In the present analysis we used data from three experiments carried out at Argonne National Laboratory with Gammasphere system • 48Ca (330MeV) + 238U (55mg/cm2) • 64Ni (430MeV) + 238U (55mg/cm2) • 48Ca (330MeV) + 208Pb (50mg/cm2) Beam pulsing: 412 ns repetition time Ischia Conference

  4. Identification for 118Sn Data was sorted to theDDP, DPP and DDD cubes of triple coincidence Ischia Conference

  5. Identification for 120Sn 15-isomer → (h11/2)3d3/2 Ischia Conference

  6. Identification for 122Sn Ł. W. Iskraet al.,ActaPhys.Pol. B 44, 395 (2013) Ischia Conference

  7. Identification for 124, 126Sn Ischia Conference

  8. Half-life and transition probability Ischia Conference

  9. Systematics and Shell-model calculations Calculations assume 132Sn as aclosed core, and use a valence space wherethe neutron holes occupy the ν(0g7/2, 1d5/2, 1d3/2, 2s1/2,0h11/2) orbitals Regular behavior of the excitation energiesstrongly supports the adopted spin-parity assignments For the set of two-body matrix elements (TBMEs),the neutron-neutron part of the shell-modelinteraction was takenfromB. A. Brownet al., Phys. Rev. C 71, 044317 (2005) Ischia Conference

  10. Summary • In the analysis we used data from three fusion-fission reactions • By employing the technique of delayed coincidences and cross-coincidence it was possible to identifymany states located above 10+ and 7- isomers in neutron-rich 118, 120, 122, 124, 126Sn isotopes including the 13- and 15- isomeric states(Ł. W. Iskraet al., Phys. Rev. C89, 044324 (2014)) • A similar analysis was performed to identify transitions located above the 27/2- isomeric statesin the odd 119, 121, 123, 125Sn isotopes including new 23/2+ and 35/2- isomers (in preparation) • Experimental findings were supported by the shell-model calculations Ł. W. Iskra, R.Broda, R. V. F. Janssens, J. Wrzesiński, B. Szpak, C. Chiara, M. P. Carpenter, B. Fornal, N. Hoteling,F. G. Kondev, W. Królas, T. Lauritsen, T. Pawłat, D. Seweryniak, I. Stefanescu,W. B. Walters, S. Zhu Thank you for yourattention Ischia Conference

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