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Singh P, Korten W, Hagen TW, et al. Evidence for Coexisting Shapes through Lifetime Measurements in ^{98}Zr. Phys Rev Lett. 2018;121(19):192501doi: 10.1103/PhysRevLett.121.192501.
Singh, P., Korten, W., Hagen, T. W., Görgen, A., Grente, L., Salsac, M. D., Farget, F., Clément, E., de France, G., Braunroth, T., Bruyneel, B., Celikovic, I., Delaune, O., Dewald, A., Dijon, A., Delaroche, J. P., Girod, M., Hackstein, M., Jacquot, B., Libert, J., Litzinger, J., Ljungvall, J., Louchart, C., Gottardo, A., Michelagnoli, C., Müller-Gatermann, C., Napoli, D. R., Otsuka, T., Pillet, N., Recchia, F., Rother, W., Sahin, E., Siem, S., Sulignano, B., Togashi, T., Tsunoda, Y., Theisen, C., & Valiente-Dobon, J. J. (2018). Evidence for Coexisting Shapes through Lifetime Measurements in ^{98}Zr. Physical review letters, 121(19), 192501. https://doi.org/10.1103/PhysRevLett.121.192501
Singh, Purnima, et al. "Evidence for Coexisting Shapes through Lifetime Measurements in ^{98}Zr." Physical review letters vol. 121,19 (2018): 192501. doi: https://doi.org/10.1103/PhysRevLett.121.192501
Singh P, Korten W, Hagen TW, Görgen A, Grente L, Salsac MD, Farget F, Clément E, de France G, Braunroth T, Bruyneel B, Celikovic I, Delaune O, Dewald A, Dijon A, Delaroche JP, Girod M, Hackstein M, Jacquot B, Libert J, Litzinger J, Ljungvall J, Louchart C, Gottardo A, Michelagnoli C, Müller-Gatermann C, Napoli DR, Otsuka T, Pillet N, Recchia F, Rother W, Sahin E, Siem S, Sulignano B, Togashi T, Tsunoda Y, Theisen C, Valiente-Dobon JJ. Evidence for Coexisting Shapes through Lifetime Measurements in ^{98}Zr. Phys Rev Lett. 2018 Nov 09;121(19):192501. doi: 10.1103/PhysRevLett.121.192501. PMID: 30468600.
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Phys Rev Lett. 2018 Nov 09;121(19):192501. doi: 10.1103/PhysRevLett.121.192501.

Evidence for Coexisting Shapes through Lifetime Measurements in ^{98}Zr.

Physical review letters

Purnima Singh, W Korten, T W Hagen, A Görgen, L Grente, M-D Salsac, F Farget, E Clément, G de France, T Braunroth, B Bruyneel, I Celikovic, O Delaune, A Dewald, A Dijon, J-P Delaroche, M Girod, M Hackstein, B Jacquot, J Libert, J Litzinger, J Ljungvall, C Louchart, A Gottardo, C Michelagnoli, C Müller-Gatermann, D R Napoli, T Otsuka, N Pillet, F Recchia, W Rother, E Sahin, S Siem, B Sulignano, T Togashi, Y Tsunoda, Ch Theisen, J J Valiente-Dobon

Affiliations

  1. Irfu, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.
  2. Department of Physics, University of Oslo, Oslo N-0316, Norway.
  3. Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Boulevard Henri Becquerel, 14076 Caen, France.
  4. Institut für Kernphysik, Universität zu Köln, Köln D-50937, Germany.
  5. Vinca Institute of Nuclear Sciences, University of Belgrade, Belgrade 11000, Serbia.
  6. CEA, DAM, DIF, 91297 Arpajon, France.
  7. CSNSM, IN2P3, Orsay 91405, France.
  8. INFN, Laboratori Nazionali di Legnaro, Legnaro I-35020, Italy.
  9. Department of Physics, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
  10. Center for Nuclear Study, University of Tokyo, Hongo, Bunkyo-ku Tokyo 113-0033, Japan.
  11. RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
  12. Instituut voor Kern- en Stralingsfysica, KU Leuven, B-3001 Leuven, Belgium.
  13. National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
  14. Dipartimento di Fisica e Astronomia "Galileo Galilei", Università degli Studi di Padova and INFN Padova, I-35131 Padova, Italy.

PMID: 30468600 DOI: 10.1103/PhysRevLett.121.192501

Abstract

The lifetimes of the first excited 2^{+}, 4^{+}, and 6^{+} states in ^{98}Zr were measured with the recoil-distance Doppler shift method in an experiment performed at GANIL. Excited states in ^{98}Zr were populated using the fission reaction between a 6.2  MeV/u ^{238}U beam and a ^{9}Be target. The γ rays were detected with the EXOGAM array in correlation with the fission fragments identified by mass and atomic number in the VAMOS++ spectrometer. Our result shows a very small B(E2;2_{1}^{+}→0_{1}^{+}) value in ^{98}Zr, thereby confirming the very sudden onset of collectivity at N=60. The experimental results are compared to large-scale Monte Carlo shell model and beyond-mean-field calculations. The present results indicate the coexistence of two additional deformed shapes in this nucleus along with the spherical ground state.

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