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Cederwall B, Liu X, Aktas Ö, et al. Isospin Properties of Nuclear Pair Correlations from the Level Structure of the Self-Conjugate Nucleus ^{88}Ru. Phys Rev Lett. 2020;124(6):062501doi: 10.1103/PhysRevLett.124.062501.
Cederwall, B., Liu, X., Aktas, �. �., Ertoprak, A., Zhang, W., Qi, C., Clément, E., de France, G., Ralet, D., Gadea, A., Goasduff, A., Jaworski, G., Kuti, I., Nyakó, B. M., Nyberg, J., Palacz, M., Wadsworth, R., Valiente-Dobón, J. J., Al-Azri, H., Ataç Nyberg, A., Bäck, T., de Angelis, G., Doncel, M., Dudouet, J., Gottardo, A., Jurado, M., Ljungvall, J., Mengoni, D., Napoli, D. R., Petrache, C. M., Sohler, D., Timár, J., Barrientos, D., Bednarczyk, P., Benzoni, G., Birkenbach, B., Boston, A. J., Boston, H. C., Burrows, I., Charles, L., Ciemala, M., Crespi, F. C. L., Cullen, D. M., Désesquelles, P., Domingo-Pardo, C., Eberth, J., Erduran, N., Ertürk, S., González, V., Goupil, J., Hess, H., Huyuk, T., Jungclaus, A., Korten, W., Lemasson, A., Leoni, S., Maj, A., Menegazzo, R., Million, B., Perez-Vidal, R. M., Podolyak, Z., Pullia, A., Recchia, F., Reiter, P., Saillant, F., Salsac, M. D., Sanchis, E., Simpson, J., Stezowski, O., Theisen, C., & Zielińska, M. (2020). Isospin Properties of Nuclear Pair Correlations from the Level Structure of the Self-Conjugate Nucleus ^{88}Ru. Physical review letters, 124(6), 062501. https://doi.org/10.1103/PhysRevLett.124.062501
Cederwall, B, et al. "Isospin Properties of Nuclear Pair Correlations from the Level Structure of the Self-Conjugate Nucleus ^{88}Ru." Physical review letters vol. 124,6 (2020): 062501. doi: https://doi.org/10.1103/PhysRevLett.124.062501
Cederwall B, Liu X, Aktas Ö, Ertoprak A, Zhang W, Qi C, Clément E, de France G, Ralet D, Gadea A, Goasduff A, Jaworski G, Kuti I, Nyakó BM, Nyberg J, Palacz M, Wadsworth R, Valiente-Dobón JJ, Al-Azri H, Ataç Nyberg A, Bäck T, de Angelis G, Doncel M, Dudouet J, Gottardo A, Jurado M, Ljungvall J, Mengoni D, Napoli DR, Petrache CM, Sohler D, Timár J, Barrientos D, Bednarczyk P, Benzoni G, Birkenbach B, Boston AJ, Boston HC, Burrows I, Charles L, Ciemala M, Crespi FCL, Cullen DM, Désesquelles P, Domingo-Pardo C, Eberth J, Erduran N, Ertürk S, González V, Goupil J, Hess H, Huyuk T, Jungclaus A, Korten W, Lemasson A, Leoni S, Maj A, Menegazzo R, Million B, Perez-Vidal RM, Podolyak Z, Pullia A, Recchia F, Reiter P, Saillant F, Salsac MD, Sanchis E, Simpson J, Stezowski O, Theisen C, Zielińska M. Isospin Properties of Nuclear Pair Correlations from the Level Structure of the Self-Conjugate Nucleus ^{88}Ru. Phys Rev Lett. 2020 Feb 14;124(6):062501. doi: 10.1103/PhysRevLett.124.062501. PMID: 32109090.
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Phys Rev Lett. 2020 Feb 14;124(6):062501. doi: 10.1103/PhysRevLett.124.062501.

Isospin Properties of Nuclear Pair Correlations from the Level Structure of the Self-Conjugate Nucleus ^{88}Ru.

Physical review letters

B Cederwall, X Liu, Ö Aktas, A Ertoprak, W Zhang, C Qi, E Clément, G de France, D Ralet, A Gadea, A Goasduff, G Jaworski, I Kuti, B M Nyakó, J Nyberg, M Palacz, R Wadsworth, J J Valiente-Dobón, H Al-Azri, A Ataç Nyberg, T Bäck, G de Angelis, M Doncel, J Dudouet, A Gottardo, M Jurado, J Ljungvall, D Mengoni, D R Napoli, C M Petrache, D Sohler, J Timár, D Barrientos, P Bednarczyk, G Benzoni, B Birkenbach, A J Boston, H C Boston, I Burrows, L Charles, M Ciemala, F C L Crespi, D M Cullen, P Désesquelles, C Domingo-Pardo, J Eberth, N Erduran, S Ertürk, V González, J Goupil, H Hess, T Huyuk, A Jungclaus, W Korten, A Lemasson, S Leoni, A Maj, R Menegazzo, B Million, R M Perez-Vidal, Zs Podolyak, A Pullia, F Recchia, P Reiter, F Saillant, M D Salsac, E Sanchis, J Simpson, O Stezowski, Ch Theisen, M Zielińska

Affiliations

  1. KTH Royal Institute of Technology, 10691 Stockholm, Sweden.
  2. Department of Physics, Faculty of Science, Istanbul University, Vezneciler/Fatih, 34134 Istanbul, Turkey.
  3. Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, Bd Henri Becquerel, BP 55027, F-14076 Caen Cedex 5, France.
  4. Centre de Sciences Nucléaires et Sciences de la Matière, CNRS/IN2P3, Université Paris-Saclay, 91405 Orsay, France.
  5. Instituto de Física Corpuscular, CSIC-Universidad de Valencia, E-46980 Valencia, Spain.
  6. Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy.
  7. Heavy Ion Laboratory, University of Warsaw, ul. Pasteura 5A,02-093 Warszawa, Poland.
  8. MTA Atomki, H-4001 Debrecen, Hungary.
  9. Department of Physics and Astronomy, Uppsala University, SE-75121 Uppsala, Sweden.
  10. Department of Physics, University of York, Heslington, York, YO10 5DD, United Kingdom.
  11. Rustaq College of Education, Department of Science, 329 Al-Rustaq, Sultanate of Oman.
  12. Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, United Kingdom.
  13. Université Lyon, CNRS/IN2P3, IPN-Lyon, F-69622, Villeurbanne, France.
  14. CERN, CH-1211 Geneva 23, Switzerland.
  15. The Henryk Niewodnicza?ski Institute of Nuclear Physics, Polish Academy of Sciences, ul. Radzikowskiego 152, 31-342 Kraków, Poland.
  16. INFN Sezione di Milano, I-20133 Milano, Italy.
  17. Institut für Kernphysik, Universität zu Köln, Zülpicher Str. 77, D-50937 Köln, Germany.
  18. Oliver Lodge Laboratory, The University of Liverpool, Liverpool, L69 7ZE, United Kingdom.
  19. STFC Daresbury Laboratory, Daresbury, Warrington, WA4 4AD, United Kingdom.
  20. IPHC, UNISTRA, CNRS, 23 rue du Loess, 67200 Strasbourg, France.
  21. University of Milano, Department of Physics, I-20133 Milano, Italy.
  22. INFN Milano, I-20133 Milano, Italy.
  23. Nuclear Physics Group, Schuster Laboratory, University of Manchester, Manchester, M13 9PL, United Kingdom.
  24. CNRS-IN2P3, Universiteé Paris-Saclay, Bat 104, F-91405 Orsay Campus, France.
  25. Instituto de Física Corpuscular, CSIC-Universidad de Valencia, E-46071 Valencia, Spain.
  26. Faculty of Engineering and Natural Sciences, Istanbul Sabahattin Zaim University, 34303, Istanbul, Turkey.
  27. Department of Physics, University of Nigde, 51240 Nigde, Turkey.
  28. Departamento de Ingeniería Electrónica, Universitat de Valencia, 46100 Burjassot, Valencia, Spain.
  29. Instituto de Estructura de la Materia, CSIC, Madrid, E-28006 Madrid, Spain.
  30. Irfu, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.
  31. INFN Padova, I-35131 Padova, Italy.
  32. Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom.
  33. Dipartimento di Fisica e Astronomia dell'Università di Padova and INFN Padova, I-35131 Padova, Italy.
  34. Université Lyon 1, CNRS/IN2P3, IPN-Lyon, F-69622, Villeurbanne, France.

PMID: 32109090 DOI: 10.1103/PhysRevLett.124.062501

Abstract

The low-lying energy spectrum of the extremely neutron-deficient self-conjugate (N=Z) nuclide _{44}^{88}Ru_{44} has been measured using the combination of the Advanced Gamma Tracking Array (AGATA) spectrometer, the NEDA and Neutron Wall neutron detector arrays, and the DIAMANT charged particle detector array. Excited states in ^{88}Ru were populated via the ^{54}Fe(^{36}Ar,2nγ)^{88}Ru^{*} fusion-evaporation reaction at the Grand Accélérateur National d'Ions Lourds (GANIL) accelerator complex. The observed γ-ray cascade is assigned to ^{88}Ru using clean prompt γ-γ-2-neutron coincidences in anticoincidence with the detection of charged particles, confirming and extending the previously assigned sequence of low-lying excited states. It is consistent with a moderately deformed rotating system exhibiting a band crossing at a rotational frequency that is significantly higher than standard theoretical predictions with isovector pairing, as well as observations in neighboring N>Z nuclides. The direct observation of such a "delayed" rotational alignment in a deformed N=Z nucleus is in agreement with theoretical predictions related to the presence of strong isoscalar neutron-proton pair correlations.

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