Skip to main content
SpringerLink
Log in

Signature of a possible \(\alpha \)-cluster state in \(N=Z\) doubly-magic \(^{56}\)Ni

  • Regular Article – Experimental Physics
  • Published:
The European Physical Journal A Aims and scope Submit manuscript

Abstract

An inelastic \(\alpha \)-scattering experiment on the unstable \(N=Z\), doubly-magic \(^{56}\)Ni nucleus was performed in inverse kinematics at an incident energy of 50 A.MeV at GANIL. High multiplicity for \(\alpha \)-particle emission was observed within the limited phase-space of the experimental setup. This observation cannot be explained by means of the statistical-decay model. The ideal classical gas model at kT = 0.4 MeV reproduces fairly well the experimental momentum distribution and the observed multiplicity of \(\alpha \) particles corresponds to an excitation energy around 96 MeV. The method of distributed \(m\alpha \)-decay ensembles is in agreement with the experimental results if we assume that the \(\alpha \)-gas state in \(^{56}\)Ni exists at around \(113^{+15}_{-17}\)  MeV. These results suggest that there may exist an exotic state consisting of many \(\alpha \) particles at the excitation energy of \(113^{+15}_{-17}\) MeV.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8

Similar content being viewed by others

Data Availability Statement

This manuscript has no associated data or the data will not be deposited. [Authors’ comment: Datasets are available upon reasonable request.]

References

  1. F. Hoyle, Astrophys. J. Suppl. Ser. 1, 121 (1954)

    Article  ADS  Google Scholar 

  2. K. Ikeda et al., Prog. Theor. Phys. Supp. E 68, 464 (1968)

    Article  Google Scholar 

  3. T. Yamada, P. Schuck, Phys. Rev. C 69, 024309 (2004)

    Article  ADS  Google Scholar 

  4. N. Itagaki et al., Phys. Rev. C 77, 037301 (2008)

    Article  ADS  Google Scholar 

  5. M. Freer, Nature 487, 309 (2012)

    Article  ADS  Google Scholar 

  6. J.A. Wheeler, Phys. Rev. 52, 1083 (1937)

    Article  ADS  Google Scholar 

  7. H. Horiuchi, Prog. Theor. Phys. Suppl. 62, 90 (1977)

    Article  ADS  Google Scholar 

  8. M. Girod, P. Schuck, Phys. Rev. Lett. 111, 132503 (2013)

    Article  ADS  Google Scholar 

  9. J.P. Ebran et al., Phys. Rev. C 89, 031303(R) (2014)

  10. S. Elhatisari et al., Phys. Rev. Lett. 119, 222505 (2017)

    Article  ADS  Google Scholar 

  11. A. Tohsaki et al., Phys. Rev. Lett. 87, 192501 (2001)

    Article  ADS  Google Scholar 

  12. F. Arickx, J. Broeckhove, E. Deumens, Nucl. Phys. A 318, 269 (1979)

    Article  ADS  Google Scholar 

  13. A. Tohsaki et al., Rev. Mod. Phys. 89, 011002 (2017)

    Article  ADS  Google Scholar 

  14. M. Freer et al., Rev. Mod. Phys. 90, 035004 (2018)

    Article  ADS  MathSciNet  Google Scholar 

  15. M. Itoh et al., Phys. Rev. C 84, 054308 (2011)

    Article  ADS  Google Scholar 

  16. R. Smith et al., Phys. Rev. Lett. 119, 132502 (2017)

    Article  ADS  Google Scholar 

  17. D. Dell’ Aquila et al., Phys. Rev. Lett. 119, 132501 (2017)

  18. M. Chernykh et al., Phys. Rev. Lett. 98, 032501 (2007)

    Article  ADS  Google Scholar 

  19. E. Uegaki et al., Prog. Theor. Phys. 57, 1262 (1977)

    Article  ADS  Google Scholar 

  20. E. Epelbaum et al., Phys. Rev. Lett. 106, 192501 (2011)

    Article  ADS  Google Scholar 

  21. T. Wakasa et al., RCNP annual report (Osaka University, Suita, 2002)

    Google Scholar 

  22. T. Wakasa et al., Phys. Lett. B 653, 173 (2007)

    Article  ADS  Google Scholar 

  23. Y. Funaki et al., Phys. Rev. Lett. 101, 082502 (2008)

    Article  ADS  Google Scholar 

  24. B. Borderie et al., Phys. Lett. B 755, 475 (2016)

    Article  ADS  Google Scholar 

  25. C. Beck (Ed.), Clusters in Nuclei, vol. 1, Lecture Notes in Physics, 818, 2010 and references therein

  26. C. Beck (Ed.), Clusters in Nuclei, vol. 2, Lecture Notes in Physics, 848, 2012 and references therein

  27. C. Beck (Ed.), Clusters in Nuclei, vol. 3, Lecture Notes in Physics, 875, 2014 and references therein

  28. M. Itoh et al., Nucl. Phys. A 738, 268 (2004)

    Article  ADS  Google Scholar 

  29. M. Freer et al., Phys. Rev. C 86, 034320 (2012)

    Article  ADS  Google Scholar 

  30. T. Furuno et al., Jour. Phys.: Conf. Ser. 863, 012076 (2017)

    Google Scholar 

  31. H. Akimune et al., Jour. Phys. 436, 012010 (2013)

    Google Scholar 

  32. NNDC(BNL)-Brookhaven National Laboratory, https://www.nndc.bnl.gov

  33. R. Anne et al., Nucl. Instrum. Meth. Phys. Res. A 257, 215 (1987)

    Article  ADS  Google Scholar 

  34. S. Bagchi, Ph.D. thesis, University of Groningen (2015), https://www.rug.nl/research/portal/files/17683086/Complete_dissertation.pdf

  35. C.E. Demonchy et al., Nucl. Instrum. Meth. Phys. Res. A 583, 341 (2007)

    Article  ADS  Google Scholar 

  36. J. Pancin et al., Jour. Instrum. 7, P01006 (2012)

    ADS  Google Scholar 

  37. M. Parlog et al., Nucl. Instrum. Meth. Phys. Res. A 482, 693 (2002)

    Article  ADS  Google Scholar 

  38. S. Bagchi et al., Phys. Lett. B 751, 371 (2015)

    Article  ADS  Google Scholar 

  39. T. Roger et al., Nucl. Instrum. Meth. Phys. Res. A 638, 134 (2011)

    Article  ADS  Google Scholar 

  40. F. Pühlhofer, Nucl. Phys. A 280, 267 (1977)

    Article  ADS  Google Scholar 

  41. M.N. Harakeh et al., Phys. Lett. B 176, 297 (1986)

    Article  ADS  Google Scholar 

Download references

Acknowledgements

This work was supported by the European Commission within the Seventh Framework Program through IA ENSAR (Contract no. RII3-CT-2010-262010), GSI, Darmstadt, Germany, the United States National Science Foundation (Grants No. PHY-1068192 and PHY-1713857), the Hungarian NKFI Foundation (No. K124810), and the Hirao Taro Foundation of the Konan University Association for Academic Research.

Author information

Author notes

  1. S. Bagchi

    Present address: Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand, 826004, India

Authors and Affiliations

  1. KVI-CART, University of Groningen, NL-9747 AA, Groningen, The Netherlands

    S. Bagchi, M. N. Harakeh, N. Kalantar-Nayestanaki, M. A. Najafi, C. Rigollet & J. Van de Walle

  2. GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany

    S. Bagchi & K. Boretzky

  3. Department of Physics, Konan University, Kobe, 658-8501, Japan

    H. Akimune

  4. LPC Caen, ENSICAEN, Université de Caen, CNRS/IN2P3, Caen, France

    J. Gibelin, N. L. Achouri, F. Delaunay, G. Lhoutellier & M. Senoville

  5. GANIL, CEA/DRF-CNRS/IN2P3, Bvd Henri Becquerel, 14076, Caen, France

    B. Bastin, H. Bouzomita, L. Càceres, S. Damoy, G. F. Grinyer, O. Kamalou, J. F. Libin, J. Pancin, T. Roger, H. Savajols, C. Stodel, L. Suen & J. C. Thomas

  6. Universidade de Santiago de Compostela, 15706, Santiago de Compostela, Spain

    M. Caamaño & B. Fernández-Domínguez

  7. Research Center for Nuclear Physics, Osaka University, Osaka, 567-0047, Japan

    M. Fujiwara

  8. Physics Department, University of Notre Dame, Notre Dame, 46556, IN, USA

    U. Garg

  9. IJCLab, Université Paris-Saclay, CNRS/IN2P3, 91405, Orsay Cedex, France

    E. Khan & L. Perrot

  10. Institute of Nuclear Research (ATOMKI), Debrecen, P.O. Box 51, 4001, Hungary

    A. Krasznahorkay

  11. G.N. Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, Dubna, Moscow oblast, 144980, Russia

    S. Lukyanov & Y. Penionzhkevich

  12. National Research Nuclear Center, Moscow Engineering Physics Institute, Kashirskoe sh. 31, Moscow, 115409, Russia

    Y. Penionzhkevich

  13. Institute of Nuclear Physics PAN, ul. Radzikowskiego 152, 31-342, Kraków, Poland

    K. Mazurek

  14. Instituut voor Kern- en Stralingsfysica, KU Leuven, 3001, Leuven, Belgium

    R. Raabe & S. Sambi

  15. IPN Orsay, Université Paris Sud, IN2P3-CNRS, 91406, Orsay Cedex, France

    M. Vandebrouck

  16. Irfu, CEA, Université Paris-Saclay, 91191, Gif-sur-Yvette, France

    M. Vandebrouck

  17. SCK CEN, Boeretang 200, 2400, Mol, Belgium

    J. Van de Walle

Authors
  1. S. Bagchi
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. H. Akimune
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. J. Gibelin
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. M. N. Harakeh
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. N. Kalantar-Nayestanaki
    View author publications

    You can also search for this author in PubMed Google Scholar

  6. N. L. Achouri
    View author publications

    You can also search for this author in PubMed Google Scholar

  7. B. Bastin
    View author publications

    You can also search for this author in PubMed Google Scholar

  8. K. Boretzky
    View author publications

    You can also search for this author in PubMed Google Scholar

  9. H. Bouzomita
    View author publications

    You can also search for this author in PubMed Google Scholar

  10. M. Caamaño
    View author publications

    You can also search for this author in PubMed Google Scholar

  11. L. Càceres
    View author publications

    You can also search for this author in PubMed Google Scholar

  12. S. Damoy
    View author publications

    You can also search for this author in PubMed Google Scholar

  13. F. Delaunay
    View author publications

    You can also search for this author in PubMed Google Scholar

  14. B. Fernández-Domínguez
    View author publications

    You can also search for this author in PubMed Google Scholar

  15. M. Fujiwara
    View author publications

    You can also search for this author in PubMed Google Scholar

  16. U. Garg
    View author publications

    You can also search for this author in PubMed Google Scholar

  17. G. F. Grinyer
    View author publications

    You can also search for this author in PubMed Google Scholar

  18. O. Kamalou
    View author publications

    You can also search for this author in PubMed Google Scholar

  19. E. Khan
    View author publications

    You can also search for this author in PubMed Google Scholar

  20. A. Krasznahorkay
    View author publications

    You can also search for this author in PubMed Google Scholar

  21. G. Lhoutellier
    View author publications

    You can also search for this author in PubMed Google Scholar

  22. J. F. Libin
    View author publications

    You can also search for this author in PubMed Google Scholar

  23. S. Lukyanov
    View author publications

    You can also search for this author in PubMed Google Scholar

  24. K. Mazurek
    View author publications

    You can also search for this author in PubMed Google Scholar

  25. M. A. Najafi
    View author publications

    You can also search for this author in PubMed Google Scholar

  26. J. Pancin
    View author publications

    You can also search for this author in PubMed Google Scholar

  27. Y. Penionzhkevich
    View author publications

    You can also search for this author in PubMed Google Scholar

  28. L. Perrot
    View author publications

    You can also search for this author in PubMed Google Scholar

  29. R. Raabe
    View author publications

    You can also search for this author in PubMed Google Scholar

  30. C. Rigollet
    View author publications

    You can also search for this author in PubMed Google Scholar

  31. T. Roger
    View author publications

    You can also search for this author in PubMed Google Scholar

  32. S. Sambi
    View author publications

    You can also search for this author in PubMed Google Scholar

  33. H. Savajols
    View author publications

    You can also search for this author in PubMed Google Scholar

  34. M. Senoville
    View author publications

    You can also search for this author in PubMed Google Scholar

  35. C. Stodel
    View author publications

    You can also search for this author in PubMed Google Scholar

  36. L. Suen
    View author publications

    You can also search for this author in PubMed Google Scholar

  37. J. C. Thomas
    View author publications

    You can also search for this author in PubMed Google Scholar

  38. M. Vandebrouck
    View author publications

    You can also search for this author in PubMed Google Scholar

  39. J. Van de Walle
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to S. Bagchi.

Additional information

Communicated by Alexandre Obertelli.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Bagchi, S., Akimune, H., Gibelin, J. et al. Signature of a possible \(\alpha \)-cluster state in \(N=Z\) doubly-magic \(^{56}\)Ni. Eur. Phys. J. A 56, 290 (2020). https://doi.org/10.1140/epja/s10050-020-00294-7

Download citation

  • Received:

  • Accepted:

  • Published:

  • DOI: https://doi.org/10.1140/epja/s10050-020-00294-7

Search

Navigation