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Anomalous quadrupole transition probabilities in the f7/2 mirror nuclei

R. Escudeiro1,2, F. Recchia1,3,*, N. H. Medina4, S. M. Lenzi3, A. Boso3, P. Aguilera1, J. Benito1,3,5, S. Carollo1,3, A. Goasduff6 et al.

A Gottardo6, M. A. Guazzelli7, J. Ha1, R. Menegazzo1, D. R. Napoli6, R. M. Pérez-Vidal8,6, J. Pellumaj1, S. Pigliapoco1,3, K. Rezynkina1, A. Algora8, G. de Angelis6, D. Barrientos9, P. Bednarczyk10, G. Benzoni11, M. Ciemala10, E. Clement12, G. De France12, J. M. Deltoro13,14, J. Dudouet15, T. Dupasquier16, J. Eberth17, N. Erduran18, S. Ertürk19, A. Gadea8, W. Gelletly20, V. González14, H. Hess17, G. Jaworski21, M. Jurado8, W. Korten22, I. Kuti23, A. Lefevre12, F. Legruel12, A. Lemasson12, S. Leoni11,24, J. Ljungvall25, B. Million11, J. Nyberg26, S. E. A. Orrigo8, M. Palacz21, Zs. Podolyak20, A. Pullia11,24, D. Ralet12, P. Reiter17, B. Rubio8, M. D. Salsac22, E. Sanchis27, M. Şenyiğit28, M. Siciliano6,22,29, J. Simpson30, D. Sohler23, O. Stezowski15, D. Testov1, J. J. Valiente-Doboón13,6, M. Zielińska22, and R. Wadsworth31

  • *Contact author: francesco.recchia@unipd.it
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Phys. Rev. C 113, 044304 – Published 3 April, 2026

DOI: https://doi.org/10.1103/1gt6-nc12

Abstract

Lifetimes of several excited states in the mirror nuclei Cr47−V47 and Mn49−Cr49, located at the center of the f7/2 shell, were measured using the advanced γ-ray tracking array AGATA. The Doppler shift attenuation method was employed to determine such lifetimes in the subpicosecond range. The reduced transition probabilities obtained from the lifetimes are compared to shell-model calculations in the full fp space. The shell-model-calculated B(E2) values were underestimated in comparison with experimental data. In particular, large discrepancies are obtained in Mn49 at low spin. These results suggest an incomplete understanding of low-energy states in the studied nuclei and call for further refinement of the existing nuclear structure theories.

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Phys. Rev. C 113, 044304– Published 3 April, 2026
  • Received 19 September 2025
  • Revised 2 February 2026
  • Accepted 27 February 2026
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