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Evidence for a spin-aligned neutron–proton paired phase from the level structure of 92Pd

Author

Listed:
  • B. Cederwall

    (Royal Institute of Technology)

  • F. Ghazi Moradi

    (Royal Institute of Technology)

  • T. Bäck

    (Royal Institute of Technology)

  • A. Johnson

    (Royal Institute of Technology)

  • J. Blomqvist

    (Royal Institute of Technology)

  • E. Clément

    (Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM – CNRS/IN2P3)

  • G. de France

    (Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM – CNRS/IN2P3)

  • R. Wadsworth

    (University of York)

  • K. Andgren

    (Royal Institute of Technology)

  • K. Lagergren

    (Royal Institute of Technology
    Joint Institute for Heavy-Ion Research, Holifield Radioactive Ion Beam Facility)

  • A. Dijon

    (Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM – CNRS/IN2P3)

  • G. Jaworski

    (Heavy Ion Laboratory, University of Warsaw
    Faculty of Physics, Warsaw University of Technology, Koszykowa 75)

  • R. Liotta

    (Royal Institute of Technology)

  • C. Qi

    (Royal Institute of Technology)

  • B. M. Nyakó

    (Institute of Nuclear Research of the Hungarian Academy of Sciences, ATOMKI)

  • J. Nyberg

    (Uppsala University)

  • M. Palacz

    (Heavy Ion Laboratory, University of Warsaw)

  • H. Al-Azri

    (University of York)

  • A. Algora

    (IFIC, CSIC, University of Valencia)

  • G. de Angelis

    (Instituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro)

  • A. Ataç

    (Ankara University)

  • S. Bhattacharyya

    (Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM – CNRS/IN2P3
    Present addresses: VECC, 1/AF Bidhan Nagar, Kolkata 700064, India (S.B.); Department of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, Finland (M.S.).)

  • T. Brock

    (University of York)

  • J. R. Brown

    (University of York)

  • P. Davies

    (University of York)

  • A. Di Nitto

    (Università di Napoli and Instituto Nazionale di Fisica Nucleare)

  • Zs. Dombrádi

    (Institute of Nuclear Research of the Hungarian Academy of Sciences, ATOMKI)

  • A. Gadea

    (IFIC, CSIC, University of Valencia)

  • J. Gál

    (Institute of Nuclear Research of the Hungarian Academy of Sciences, ATOMKI)

  • B. Hadinia

    (Royal Institute of Technology)

  • F. Johnston-Theasby

    (University of York)

  • P. Joshi

    (University of York)

  • K. Juhász

    (University of Debrecen)

  • R. Julin

    (University of Jyväskylä)

  • A. Jungclaus

    (Instituto de Estructura de la Materia, CSIC)

  • G. Kalinka

    (Institute of Nuclear Research of the Hungarian Academy of Sciences, ATOMKI)

  • S. O. Kara

    (Ankara University)

  • A. Khaplanov

    (Royal Institute of Technology)

  • J. Kownacki

    (Heavy Ion Laboratory, University of Warsaw)

  • G. La Rana

    (Università di Napoli and Instituto Nazionale di Fisica Nucleare)

  • S. M. Lenzi

    (Diparimento di Fisica dell'Università di Padova and Instituto Nazionale di Fisica Nucleare, Sezione di Padova)

  • J. Molnár

    (Institute of Nuclear Research of the Hungarian Academy of Sciences, ATOMKI)

  • R. Moro

    (Università di Napoli and Instituto Nazionale di Fisica Nucleare)

  • D. R. Napoli

    (Instituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro)

  • B. S. Nara Singh

    (University of York)

  • A. Persson

    (Royal Institute of Technology)

  • F. Recchia

    (Diparimento di Fisica dell'Università di Padova and Instituto Nazionale di Fisica Nucleare, Sezione di Padova)

  • M. Sandzelius

    (Royal Institute of Technology
    Present addresses: VECC, 1/AF Bidhan Nagar, Kolkata 700064, India (S.B.); Department of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, Finland (M.S.).)

  • J.-N. Scheurer

    (Université Bordeaux 1, CNRS/IN2P3, Centre d'Etudes Nucléaires de Bordeaux Gradignan)

  • G. Sletten

    (The Niels Bohr Institute, University of Copenhagen)

  • D. Sohler

    (Institute of Nuclear Research of the Hungarian Academy of Sciences, ATOMKI)

  • P.-A. Söderström

    (Uppsala University)

  • M. J. Taylor

    (University of York)

  • J. Timár

    (Institute of Nuclear Research of the Hungarian Academy of Sciences, ATOMKI)

  • J. J. Valiente-Dobón

    (Instituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro)

  • E. Vardaci

    (Università di Napoli and Instituto Nazionale di Fisica Nucleare)

  • S. Williams

    (TRIUMF)

Abstract

A new spin on neutron–proton pairs In nuclei with equal neutron (N) and proton (Z) numbers, the observed enhanced neutron–proton correlations are predicted to favour isoscalar neutron–proton pairing, an unusual interaction that is distinct from normal nuclear superfluidity. Now, in a major experiment at the GANIL heavy-ion accelerator in France, observations of excited states of the N = Z = 46 palladium nucleus 92Pd provide evidence for spin-aligned isoscalar neutron–proton pairing that is rather different to that predicted, and which has not been seen previously in nuclei.

Suggested Citation

  • B. Cederwall & F. Ghazi Moradi & T. Bäck & A. Johnson & J. Blomqvist & E. Clément & G. de France & R. Wadsworth & K. Andgren & K. Lagergren & A. Dijon & G. Jaworski & R. Liotta & C. Qi & B. M. Nyakó &, 2011. "Evidence for a spin-aligned neutron–proton paired phase from the level structure of 92Pd," Nature, Nature, vol. 469(7328), pages 68-71, January.
    • Handle: RePEc:nat:nature:v:469:y:2011:i:7328:d:10.1038_nature09644
    DOI: 10.1038/nature09644
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