Systematic investigation of the structure of exotic even-even nuclei via fast timing lifetime measurements of excited nuclear states

• Antragsteller: Professor Dr. Jan Jolie
• Fachliche Zuordnung: Kern- und Elementarteilchenphysik, Quantenmechanik, Relativitätstheorie, Felder
• Förderung: Förderung von 2013 bis 2021
• Projektkennung: Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 239902156

• Erstellungsjahr: 2021

Zusammenfassung der Projektergebnisse

Systematic investigation of the structural evolution in the shape transition regions of even-even nuclei from Er to Pt via fast timing lifetime measurements of excited nuclear states were done. They were performed using conversion electron-LaBr3(Ce) and Ge gated LaBr3(Ce)-LaBr3 (Ce) coincidences. Several lifetimes of low-lying states that had large uncertainties or were still unknown were obtained. They allowed the determination of absolute transition rates, mainly B(E2) values of low-spin yrast states. They were used for comparison with several theoretical models including theoretical studies applying the interacting boson model based on microscopic mean field methods.

Projektbezogene Publikationen (Auswahl)

• Evolution of the E2 transition strenght in deformed hafnium isotopes from new measurements in 172Hf, 174Hf and 176Hf, Phys. Rev C 91, 044301 (2015)
  M. Rudigier, K. Nomura, M. Dannhoff, R.-B. Gerst, J. Jolie, N. Saed-Samii, S. Stegemann, J.-M. Regis, L.M. Robledo, R. Rodriguez-Guzman, A. Blazhev, Ch. Fransen, N. Warr and K.O. Zell
  (Siehe online unter https://doi.org/10.1103/PhysRevC.91.044301)
• Evolution of collectivity near mid-shell from excited-state lifetime measurements in rare earth nuclei, Phys. Rev. C 93, 034323 (2016)
  V. Werner, N. Cooper, J.-M. Regis, M. Rudigier, E. Williams, J. Jolie, R. B. Cakirli, R.F. Casten, T. Ahn, V. Anagnostatou, Z. Berant, M. Bonett-Matiz, M. Elvers, A. Heinz, G. Ilie, D. Radeck, D. Savran and M.K. Smith
  (Siehe online unter https://doi.org/10.1103/PhysRevC.93.034323)
• Evolution of collectivity in the N=100 isotones near 170Yb, Phys. Rev C 95, 034316 (2017)
  V. Karayonchev, J.-M. Regis, J. Jolie, A. Blazhev, S. Ansari, R. Altenkirch, M. Dannhoff, F. Diel,A. Esmaylzadeh, Ch. Fransen, R.-B. Gerst, K. Moschner, C. Muller-Gatermann, N. Saed-Samii, S. Stegemann, N. Warr and K.O. Zell
  (Siehe online unter https://doi.org/10.1103/PhysRevC.95.034316)
• Lifetime determination in 190,192,194,196Hg via − fast-timing spectroscopy, Phys. Rev. C 98 (2018) 014313
  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
  (Siehe online unter https://doi.org/10.1103/PhysRevC.98.014313)
• Low-lying electromagnetic transition strengths in 180Pt, Phys. Rev. C 97 (2018) 024336
  C. Müller-Gatermann, Dewald, A., Fransen, C., Braunroth, T., Jolie, J., Litzinger, J., Régis, J. M., von Spee, F., Warr, N., Zell, K. O., Grahn, T., Greenlees, P. T., Hauschild, K., Jakobsson, U., Julin, R., Juutinen, S., Ketelhut, S., Nieminen, P., Nyman, M., Peura, P., Rahkila, P., Ruotsalainen, P., Sandzelius, M., Sar\'en, J. Scholey, C., Sorri, J., Stolze, S., Uusitalo, J. and Petkov P.
  (Siehe online unter https://doi.org/10.1103/PhysRevC.97.024336)
• Evolution of E2 strength in the rare-earth isotopes 174,176,178,180Hf, Phys. Rev. C 99 (2019), 024316
  J. Wiederhold, V. Werner, R. Kern, N. Pietralla, D. Bucurescu, R. Carroll, N. Cooper, T. Daniel, D. Filipescu, N. Florea, R-B. Gerst, D. Ghita, L. Gurgi, J. Jolie, R. S. Ilieva, R. Lica, N. Marginean, R. Marginean, C. Mihai, I. O. Mitu, F. Naqvi, C. Nita, M. Rudigier, S. Stegemann, S. Pascu, and P. H. Regan
  (Siehe online unter https://doi.org/10.1103/PhysRevC.99.024316)
• Lifetime measurements of 162Er : Evolution of collectivity in the rare-earth region. Phys. Rev. C 102, (2020) 044310
  L. Knafla, G. Häfner, J. Jolie, J.-M. Régis, V. Karayonchev, A. Blazhev, A. Esmaylzadeh, C. Fransen, A. Goldkuhle, S. Herb, C. Müller-Gatermann, N. Warr, and K. O. Zell
  (Siehe online unter https://doi.org/10.1103/PhysRevC.102.044310)
• Lifetime measurements in 182Pt using γ-γ fast-timing, Eur. Phys. Journ. A 57 (2021) 174
  G. Haefner, A. Esmaylzadeh, J. Jolie, J.-M. Régis, C. Müller -Gatermann, A. Blazhev, C. Fransen, R.-B. Gerst, V. Karayonchev, L. Knafla, N. Saed-Samii, and K.-O. Zell
  (Siehe online unter https://doi.org/10.1140/epja/s10050-021-00492-x)