Fission of <math><mmultiscripts><mi>Fr</mi><mprescripts/><none/><mn>215</mn></mmultiscripts></math> studied with <math><mi>γ</mi></math> spectroscopic methods - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Phys.Rev.C Année : 2023

Fission of Fr215 studied with γ spectroscopic methods

K Miernik
  • Fonction : Auteur
A Korgul
  • Fonction : Auteur
W Poklepa
  • Fonction : Auteur
P Czyż
  • Fonction : Auteur
A Fijałkowska
  • Fonction : Auteur
L.M Fraile
  • Fonction : Auteur
P Garczyński
  • Fonction : Auteur
M Llanos
  • Fonction : Auteur
J Mielczarek
  • Fonction : Auteur
J.R Murias
  • Fonction : Auteur
A Skruch
  • Fonction : Auteur
K Solak
  • Fonction : Auteur

Résumé

Background: Asymmetric fission is known to occur in two regions, the actinides and sublead, and is dependent on the fissioning system excitation energy. Experimental evidence in the sublead region show that this mode is surprisingly persistent with increasing energy and its origin is not fully understood. Purpose: To experimentally study the fusion-fission reaction of Fr215 at moderate excitation energy and determine previously unknown independent fission yields and other properties. Method: The compound nucleus was formed in the reaction O18+Au197. The prompt γ rays emitted during the reaction were measured with the high efficiency and high granularity ν-ball-2 spectrometer. Independent fission yields of even-even nuclei were determined by detecting triple-gamma cascades in the fission fragments. Results: The observed yields, although dominated by a symmetric peak, show maxima for heavy fragment of Z5456, which is consistent with the known results in the actinide region but unexpected for the nuclide of interest, and at the studied excitation energy. Conclusions: The mode of asymmetric fission is present even at relatively high excitation energies in the system studied. This observation matches experimental findings in the sublead region, contrary to the actinides, and so far there is no well-developed explanation of this phenomenon.

Dates et versions

hal-04308695 , version 1 (27-11-2023)

Identifiants

Citer

K Miernik, A Korgul, W Poklepa, J.N Wilson, G Charles, et al.. Fission of Fr215 studied with γ spectroscopic methods. Phys.Rev.C, 2023, 108 (5), pp.054608. ⟨10.1103/PhysRevC.108.054608⟩. ⟨hal-04308695⟩
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