Gamma-ray spectroscopy in 110Sn and 111Sn |
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Authors: | M Wolińska-Cichocka J Kownacki W Urban E Ruchowska W A P?óciennik B Bekman Ch Droste W Gast R Lieder W Meczyński M Kisieliński A Kordyasz M Kowalczyk P Kowina J Iwanicki T Morek J Perkowski J Srebrny A Stolarz J Styczeń |
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Institution: | (1) Heavy Ion Laboratory, Warsaw University, Pasteura 5A, 02-093 Warszawa, Poland;(2) Faculty of Physics, Warsaw University, Hoa 69, 00-681 Warszawa, Poland;(3) The Andrzej Sotan Institute for Nuclear Studies, PL-05-400 Otwock-wierk wierk, Poland;(4) Department of Physics, Silesia University, Katowice, Poland;(5) Institut für Kernphysik, Forschungszentrum, D-52425 Jülich Jülich, Germany;(6) The H. Niewodniczaski Institute of Nuclear Physics, 31-342 Kraków, Poland;(7) Department of Physics, University of ód, ul. Pomorska 149/153, 90-286 ód, Poland |
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Abstract: | Excited states in 110Sn and 111Sn nuclei have been investigated using in-beam -ray spectroscopic methods. An 16O beam with an energy of 60-80MeV was used to bombard a 98Mo target. On the basis of the relative excitation functions, -ray angular distributions, - and -time distributions, -ray multiplicity and total energy data, the level schemes of 110Sn and 111Sn have been studied and extended up to Eexc 11.5MeV, I = 24, and Eexc 11.1MeV and I = (51/2), respectively. An extension of the intruder, g.s. and negative-parity bands, as well as 5 new band-like structures are proposed in 110Sn. The nature of newly introduced collective band 8 as well as 10+ states fed in the decay of the collective band is discussed. In the 111Sn nucleus an intruder band based on the 23/2- state has been reinvestigated and the extension of the g.s. band and second negative-parity band is given. Evidence for neutron-core coupling in 111Sn is found. The structure and systematics of excited states in light Sn isotopes is discussed. |
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Keywords: | 27 60 +j 90 A gif" alt="les" align="MIDDLE" BORDER="0"> A 149" target="_blank">gif" alt="les" align="MIDDLE" BORDER="0"> 149 23 20 Lv transitions and level energies" target="_blank">gif" alt="gamma" align="MIDDLE" BORDER="0"> transitions and level energies 21 60 Cs Shell model 21 10 Re Collective levels |
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