Physics Letters B (Jul 2020)

Pairing-quadrupole interplay in the neutron-deficient tin nuclei: First lifetime measurements of low-lying states in 106,108Sn

  • M. Siciliano,
  • J.J. Valiente-Dobón,
  • A. Goasduff,
  • F. Nowacki,
  • A.P. Zuker,
  • D. Bazzacco,
  • A. Lopez-Martens,
  • E. Clément,
  • G. Benzoni,
  • T. Braunroth,
  • F.C.L. Crespi,
  • N. Cieplicka-Oryńczak,
  • M. Doncel,
  • S. Ertürk,
  • G. de France,
  • C. Fransen,
  • A. Gadea,
  • G. Georgiev,
  • A. Goldkuhle,
  • U. Jakobsson,
  • G. Jaworski,
  • P.R. John,
  • I. Kuti,
  • A. Lemasson,
  • T. Marchi,
  • D. Mengoni,
  • C. Michelagnoli,
  • T. Mijatović,
  • C. Müller-Gatermann,
  • D.R. Napoli,
  • J. Nyberg,
  • M. Palacz,
  • R.M. Pérez-Vidal,
  • B. Sayği,
  • D. Sohler,
  • S. Szilner,
  • D. Testov,
  • M. Zielińska,
  • D. Barrientos,
  • B. Birkenbach,
  • H.C. Boston,
  • A.J. Boston,
  • B. Cederwall,
  • J. Collado,
  • D.M. Cullen,
  • P. Désesquelles,
  • C. Domingo-Pardo,
  • J. Dudouet,
  • J. Eberth,
  • F.J. Egea-Canet,
  • V. González,
  • L.J. Harkness-Brennan,
  • H. Hess,
  • D.S. Judson,
  • A. Jungclaus,
  • W. Korten,
  • M. Labiche,
  • A. Lefevre,
  • S. Leoni,
  • H. Li,
  • A. Maj,
  • R. Menegazzo,
  • B. Million,
  • A. Pullia,
  • F. Recchia,
  • P. Reiter,
  • M.D. Salsac,
  • E. Sanchis,
  • O. Stezowski,
  • Ch. Theisen

Journal volume & issue
Vol. 806
p. 135474

Abstract

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The lifetimes of the low-lying excited states 2+ and 4+ have been directly measured in the neutron-deficient 106,108Sn isotopes. The nuclei were populated via a deep-inelastic reaction and the lifetime measurement was performed employing a differential plunger device. The emitted γ rays were detected by the AGATA array, while the reaction products were uniquely identified by the VAMOS++ magnetic spectrometer. Large-Scale Shell-Model calculations with realistic forces indicate that, independently of the pairing content of the interaction, the quadrupole force is dominant in the B(E2;21+→0g.s.+) values and it describes well the experimental pattern for 104−114Sn; the B(E2;41+→21+) values, measured here for the first time, depend critically on a delicate pairing-quadrupole balance, disclosed by the very precise results in 108Sn.

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