First observation of the $\beta$3$\alpha$p decay of $^{13}\mathrm{O}$ via $\beta$-delayed charged-particle spectroscopy - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review Letters Année : 2023

First observation of the $\beta$3$\alpha$p decay of $^{13}\mathrm{O}$ via $\beta$-delayed charged-particle spectroscopy

Jack Bishop
  • Fonction : Auteur
G.V Rogachev
  • Fonction : Auteur
S Ahn
  • Fonction : Auteur
M Barbui
  • Fonction : Auteur
S.M Cha
  • Fonction : Auteur
E Harris
  • Fonction : Auteur
C Hunt
  • Fonction : Auteur
C.H Kim
  • Fonction : Auteur
D Kim
  • Fonction : Auteur
S.H Kim
  • Fonction : Auteur
E Koshchiy
  • Fonction : Auteur
Z Luo
  • Fonction : Auteur
C Park
  • Fonction : Auteur
C.E Parker
  • Fonction : Auteur
B.T Roeder
  • Fonction : Auteur
M Roosa
  • Fonction : Auteur
A Saastamoinen
  • Fonction : Auteur
D.P Scriven
  • Fonction : Auteur

Résumé

Background: The $\beta$-delayed proton-decay of $^{13}\mathrm{O}$ has previously been studied, but the direct observation of $\beta$-delayed $\alpha$+$\alpha$+$\alpha$+p decay has not been reported. Purpose: Observing rare 3$\alpha$+p events from the decay of excited states in $^{13}\mathrm{N}^{\star}$ allows for a sensitive probe of exotic highly-clustered configurations in $^{13}$N. Method: To measure the low-energy products following $\beta$-delayed 3$\alpha$p-decay, the TexAT Time Projection Chamber was employed using the one-at-a-time $\beta$-delayed charged-particle spectroscopy technique at the Cyclotron Institute, Texas A&M University. Results: A total of $1.9 \times 10^{5}$$^{13}\mathrm{O}$ implantations were made inside the TexAT Time Projection Chamber. 149 3$\alpha$+p events were observed yielding a $\beta$-delayed 3$\alpha+p$ branching ratio of 0.078(6)%. Conclusion: Four previously unknown $\alpha$-decaying states were observed, one with a strong $^{9}\mathrm{B(g.s)}+\alpha$ characteristic at 11.3 MeV, one with a $^{9}\mathrm{B}(\frac{1}{2}^{+})+\alpha$ nature at 12.4 MeV, and another two that are dominated by $^{9}\mathrm{B}({\frac{5}{2}}^{+})+\alpha$ at 13.1 and 13.7 MeV. Population of the $\frac{1}{2}^{+}$ state in $^{9}\mathrm{B}$ has been unambiguously seen, cementing the predicted existence of the mirror-state based on the states observed in $^{9}\mathrm{Be}$.

Dates et versions

hal-04038957 , version 1 (21-03-2023)

Identifiants

Citer

Jack Bishop, G.V Rogachev, S Ahn, M Barbui, S.M Cha, et al.. First observation of the $\beta$3$\alpha$p decay of $^{13}\mathrm{O}$ via $\beta$-delayed charged-particle spectroscopy. Physical Review Letters, 2023, 130 (22), pp.222501. ⟨10.1103/PhysRevLett.130.222501⟩. ⟨hal-04038957⟩
22 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More