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Lifetimes of the 21+ and 41+ states of the neutron-rich nuclide Pt200

C. M. Nickel1,*, V. Werner1,2, P. R. John1, U. Ahmed1,2, T. Beck1, M. Boromiza3, C. Clisu-Stan3, A. Coman3, C. Costache3 et al.

N. M. Florea3, K. E. Ide1, A. Ionescu3, R. Lică3, N. M. Mărginean3, R. Mărginean3, H. Mayr1, C. Mihai3, R. E. Mihai3,4, A. Mitu3, S. Pascu3, N. Pietralla1, L. Stan3, T. Stetz1, A. E. Turturică3, S. Ujeniuc3, A. Weber1, and R. Zidarova1

  • *Contact author: cnickel@ikp.tu-darmstadt.de
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Phys. Rev. C 113, 044307 – Published 9 April, 2026

DOI: https://doi.org/10.1103/8lx9-js9b

Abstract

The lifetimes of the 21+ and 41+ states of Pt200 were measured by applying the recoil-distance Doppler-shift method. Excited states were populated in the Pt198(O18, O16)Pt200 two-neutron transfer reaction at the 9-MV tandem accelerator at the IFIN-HH in Măgurele, Romania. The resulting B(E2) values of the 21+→01+ and 41+→21+ transitions as well as the B4/2 ratio of 2.10(31) indicate an evolution of the nuclear structure toward sphericity when approaching the neutron shell closure at N=126. The B(E2;21+→01+) values of Pt and Hg are compared to values of Te, Xe, and Ba where similar structural effects are exhibited.

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References (48)

  1. J. Jolie, P. Cejnar, R. F. Casten, S. Heinze, A. Linnemann, and V. Werner, Triple point of nuclear deformations, Phys. Rev. Lett. 89, 182502 (2002).
  2. J. Jolie and A. Linnemann, Prolate-oblate phase transition in the Hf-Hg mass region, Phys. Rev. C 68, 031301(R) (2003).
  3. P. D. Stevenson, M. P. Brine, Zs. Podolyák, P. H. Regan, P. M. Walker, and J. R. Stone, Shape evolution in the neutron-rich tungsten region, Phys. Rev. C 72, 047303 (2005).
  4. P. Sarriguren, R. Rodríguez-Guzmán, and L. M. Robledo, Shape transitions in neutron-rich Yb, Hf, W, Os, and Pt isotopes within a Skyrme Hartree-Fock+BCS approach, Phys. Rev. C 77, 064322 (2008).
  5. N. Alkhomashi, P. H. Regan, Zs. Podolyák, S. Pietri, A. B. Garnsworthy, S. J. Steer, J. Benlliure, E. Caserejos, R. F. Casten, J. Gerl, et al., β−-delayed spectroscopy of neutron-rich tantalum nuclei: Shape evolution in neutron-rich tungsten isotopes, Phys. Rev. C 80, 064308 (2009).
  6. K. Nomura, T. Otsuka, R. Rodríguez-Guzmán, L. M. Robledo, and P. Sarriguren, Collective structural evolution in neutron-rich Yb, Hf, W, Os, and Pt isotopes, Phys. Rev. C 84, 054316 (2011).
  7. E. Şahin, V. Werner, A. K. Mistry, M. Rudigier, K. Nomura, J. Jolie, N. Pietralla, P. H. Regan, G. Ağgez, H. M. Albers, U. Ahmed, O. Aktaş, A. Algora, S. Alhomaidhi, C. Appleton, T. Arıcı, M. Armstrong, A. Banerjee, J. Benito, G. Benzoni, et al., Collectivity at the prolate-oblate transition: The 21+ lifetime of W190, Phys. Lett. B 857, 138976 (2024).
  8. J. A. Cizewski, R. F. Casten, G. J. Smith, M. L. Stelts, W. R. Kane, H. G. Börner, and W. F. Davidson, Evidence for a new symmetry in nuclei: The structure of Pt196 and the O(6) limit, Phys. Rev. Lett. 40, 167 (1978).
  9. R. F. Casten, P. von Brentano, K. Heyde, P. V. Isacker, and J. Jolie, The interplay of γ-softness and triaxiality in O(6)-like nuclei, Nucl. Phys. A 439, 289 (1985).
  10. F. Iachello and A. Arima, The Interacting Boson Model (Cambridge University Press, Cambridge, UK, 1987).
  11. D. Bucurescu, I. Căta-Danil, G. Ciocan, C. Costache, D. Deleanu, R. Dima, D. Filipescu, N. Florea, D. G. Ghiţă, T. Glodariu, M. Ivaşcu, R. Lică, N. Mărginean, R. Mărginean, C. Mihai, A. Negret, C. R. Niţă, A. Olăcel, S. Pascu, T. Sava, et al., The ROSPHERE γ-ray spectroscopy array, Nucl. Instrum. Methods Phys. Res. Sect. A 837, 1 (2016).
  12. A. Dewald, O. Möller, and P. Petkov, Developing the recoil distance Doppler-shift technique towards a versatile tool for lifetime measurements of excited nuclear states, Prog. Part. Nucl. Phys. 67, 786 (2012).
  13. T. K. Alexander and A. Bell, A target chamber for recoil-distance lifetime measurements, Nucl. Instrum. Methods 81, 22 (1970).
  14. T. Beck, C. Costache, R. Lică, N. Mărginean, C. Mihai, R. E. Mihai, O. Papst, S. Pascu, N. Pietralla, C. Sotty, L. Stan, A. E. Turturică, V. Werner, J. Wiederhold, and W. Witt, SORCERER: A novel particle-detection system for transfer-reaction experiments at ROSPHERE, Nucl. Instrum. Methods Phys. Res. Sect. A 951, 163090 (2020).
  15. D. Kocheva, G. Rainovski, J. Jolie, M. Beckers, A. Blazhev, A. Esmaylzadeh, C. Fransen, K. A. Gladnishki, N. Pietralla, M. Scheck, F. Spee, M. Stoyanova, V. Werner, G. De Gregorio, A. Gargano, and B. A. Brown, Study the structure of the low-lying states of Po206, Phys. Scr. 99, 065307 (2024).
  16. B. Saha, Bestimmung der Lebensdauern kollektiver Kernanregungen in 124-Xe und Entwicklung von entsprechender Analysesoftware, Ph.D. thesis, Universität zu Köln, 2004.
  17. A. E. Stuchbery and N. J. Stone, Recoil in vacuum for Te ions: Calibration, models, and applications to radioactive-beam g-factor measurements, Phys. Rev. C 76, 034307 (2007).
  18. D. Radeck, V. Werner, G. Ilie, N. Cooper, V. Anagnostatou, T. Ahn, L. Bettermann, R. J. Casperson, R. Chevrier, A. Heinz, J. Jolie, D. McCarthy, M. K. Smith, and E. Williams, Simultaneous deorientation and lifetime measurement in Ru98 using the recoil distance Doppler shift method in inverse Coulomb excitation, Phys. Rev. C 85, 014301 (2012).
  19. H. J. Rose and D. M. Brink, Angular distributions of gamma rays in terms of phase-defined reduced matrix elements, Rev. Mod. Phys. 39, 306 (1967).
  20. F. G. Kondev, Recommended nuclear structure and decay data for A = 200 isobars, Nucl. Data Sheets 192, 1 (2023).
  21. J. Litzinger, A. Blazhev, A. Dewald, F. Didierjean, G. Duchêne, C. Fransen, R. Lozeva, K. Sieja, D. Verney, G. de Angelis, D. Bazzacco, B. Birkenbach, S. Bottoni, A. Bracco, T. Braunroth, B. Cederwall, L. Corradi, F. C. L. Crespi, P. Désesquelles, J. Eberth, et al., Transition probabilities in neutron-rich Se84,86, Phys. Rev. C 92, 064322 (2015).
  22. H. Bateman, Solution of a system of differential equations occurring in the theory of radioactive transformations, in Mathematical Proceedings of the Cambridge Philosophical Society, Mathematical and Physical Sciences (1910), Vol. 15, pp. 423–427.
  23. S. W. Yates, E. M. Baum, E. A. Henry, L. G. Mann, N. Roy, A. Aprahamian, R. A. Meyer, and R. Estep, Nuclear structure of Pt200 from in-beam conversion-electron and γ-ray spectroscopy, Phys. Rev. C 37, 1889 (1988).
  24. T. Tamura, Nuclear data sheets for A = 122, Nucl. Data Sheets 108, 455 (2007).
  25. J. Katakura and Z. D. Wu, Nuclear data sheets for A=124, Nucl. Data Sheets 109, 1655 (2008).
  26. H. Iimura, J. Katakura, and S. Ohya, Nuclear data sheets for A = 126, Nucl. Data Sheets 180, 1 (2022).
  27. Z. Elekes and J. Timar, Nuclear data sheets for A = 128, Nucl. Data Sheets 129, 191 (2015).
  28. B. Singh, Nuclear data sheets for A = 130, Nucl. Data Sheets 93, 33 (2001).
  29. Y. Khazov, A. A. Rodionov, S. Sakharov, and B. Singh, Nuclear data sheets for A = 132, Nucl. Data Sheets 104, 497 (2005).
  30. A. A. Sonzogni, Nuclear data sheets for A = 134, Nucl. Data Sheets 103, 1 (2004).
  31. E. A. Mccutchan, Nuclear data sheets for A = 136, Nucl. Data Sheets 152, 331 (2018).
  32. J. Chen, Nuclear data sheets for A=138, Nucl. Data Sheets 146, 1 (2017).
  33. S. Kisyov, C. Y. Wu, J. Henderson, A. Gade, K. Kaneko, Y. Sun, N. Shimizu, T. Mizusaki, D. Rhodes, S. Biswas, A. Chester, M. Devlin, P. Farris, A. M. Hill, J. Li, E. Rubino, and D. Weisshaar, Structure of Xe126,128 studied in Coulomb excitation measurements, Phys. Rev. C 106, 034311 (2022).
  34. L. Coquard, N. Pietralla, G. Rainovski, T. Ahn, L. Bettermann, M. P. Carpenter, R. V. F. Janssens, J. Leske, C. J. Lister, O. Möller, W. Rother, V. Werner, and S. Zhu, Evolution of the mixed-symmetry 21,ms+ quadrupole-phonon excitation from spherical to γ-soft Xe nuclei, Phys. Rev. C 82, 024317 (2010).
  35. B. Singh, Nuclear data sheets for A = 182, Nucl. Data Sheets 130, 21 (2015).
  36. C. M. Baglin, Nuclear data sheets for A = 184, Nucl. Data Sheets 111, 275 (2010).
  37. J. C. Batchelder, A. M. Hurst, and M. S. Basunia, Nuclear data sheets for A = 186, Nucl. Data Sheets 183, 1 (2022).
  38. F. G. Kondev, S. Juutinen, and D. J. Hartley, Nuclear data sheets for A = 188, Nucl. Data Sheets 150, 1 (2018).
  39. B. Singh and J. Chen, Nuclear data sheets for A=190, Nucl. Data Sheets 169, 1 (2020).
  40. C. M. Baglin, Nuclear data sheets for A=192, Nucl. Data Sheets 113, 1871 (2012).
  41. J. Chen and B. Singh, Nuclear data sheets for A=194, Nucl. Data Sheets 177, 1 (2021).
  42. J. Halperin, Nuclear data sheets for A=196, Nucl. Data Sheets 28, 485 (1979).
  43. X. Huang and M. Kang, Nuclear data sheets for A=198, Nucl. Data Sheets 133, 221 (2016).
  44. F. G. Kondev, Recommended nuclear structure and decay data for A=202 isobars, Nucl. Data Sheets 196, 342 (2024).
  45. C. J. Chiara and F. G. Kondev, Nuclear data sheets for A = 204, Nucl. Data Sheets 111, 141 (2010).
  46. F. G. Kondev, Recommended nuclear structure and decay data for A = 206 isobars, Nucl. Data Sheets 201, 346 (2025).
  47. A. Esmaylzadeh, L. M. Gerhard, V. Karayonchev, J.-M. Régis, J. Jolie, M. Bast, A. Blazhev, T. Braunroth, M. Dannhoff, F. Dunkel, C. Fransen, G. Häfner, L. Knafla, M. Ley, C. Müller-Gatermann, K. Schomacker, N. Warr, and K.-O. Zell, Lifetime determination in Hg190,192,194,196 via γ−γ fast-timing spectroscopy, Phys. Rev. C 98, 014313 (2018).
  48. J. Yan, R. Wirowski, P. von Brentano, A. Dewald, and A. Gelberg, Proton-neutron symmetry in valence mirror nuclei, Phys. Rev. C 42, 743 (1990).

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Phys. Rev. C 113, 044307– Published 9 April, 2026
  • Received 26 September 2025
  • Accepted 26 February 2026
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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