Few-body correlations in nuclear systems

• Applicant: Professor Dr. Gerd Röpke
• Subject Area: Nuclear and Elementary Particle Physics, Quantum Mechanics, Relativity, Fields ; Astrophysics and Astronomy
• Term: from 2019 to 2025
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 422826161

• Final Report Year: 2024

Final Report Abstract

Alpha-like correlations in various nuclear systems were investigated. In particular, self-conjugated 4n nuclei(12C, 16O, 20Ne) were studied, but also other isotopes and halo nuclei. The formation of a quantum condensate is an exciting phenomenon, and the BEC-BCS transition was addressed. The "Quartetting wave function approach" was continued and the alpha decay of various isotopes was treated. An improvement of the shell model was intended to describe few-nucleon correlations. An important in-medium effect is Pauli-blocking, first calculations for 2p nuclei were performed. The formation of light clusters was investigated in ternary fission of actinides, and the contribution of correlations in the continuum and the dissolution of weakly bound nuclei due to Pauli-blocking at the scission point were shown.

Publications

• Alpha Clustering from the quartet model. Rev. C 99, 034305.
  Bai, Dong; Ren, Zhongzhou & Röpke, Gerd
  
• Full distribution of clusters with universal couplings and in-medium effects. Physical Review C, 99(5).
  Pais, Helena; Gulminelli, Francesca; Providência, Constança & Röpke, Gerd
  
• Investigation of isospin-triplet and isospin-singlet pairing in the A=10 nuclei B-10, Be-10, and C-10 with an extension of the Tohsaki-Horiuchi-Schuck-Ropke wave function. Phys. Rev. C 100, 014306.
  Zhao, Qing; Ren, Zhongzhou; Lyu, Mengjiao; Horiuchi, Hisashi; Kanada-En'yo, Yoshiko; Funaki, Yasuro; Röpke, Gerd; Schuck, Peter; Tohsaki, Akihiro; Xu, Chang; Yamada, Taiichi & Zhou, Bo
  
• Nonlocalized motion in a two-dimensional container of alpha particles in 3(-) and 4(-) states of C-12. Phys. Rev. C 99, 051303.
  Zhou, Bo; Funaki, Yasuro; Horiuchi, Hisashi; Kimura, Masaaki; Ren, Zhongzhou; Röpke, Gerd; Schuck, Peter; Tohsaki, Akihiro; Xu, Chang & Yamada, Taiichi
  
• Alpha decay to a doubly magic core in the quartetting wave function approach. Phys. Rev. C 101, 024316.
  Yang, Shuo; Xu, Chang; Röpke, Gerd; Schuck, Peter; Ren, Zhongzhou; Funaki, Yasuro; Horiuchi, Hisashi; Tohsaki, Akihiro; Yamada, Taiichi & Zhou, Bo
  
• Isotopic equilibrium constants for very low-density and low-temperature nuclear matter. Physical Review C, 102(6).
  Natowitz, J. B.; Pais, H.; Röpke, G.; Gauthier, J.; Hagel, K.; Barbui, M. & Wada, R.
  
• Light clusters in warm stellar matter: calibrating the cluster couplings. The European Physical Journal A, 56(11).
  Custódio, Tiago; Falcão, Alexandre; Pais, Helena; Providência, Constança; Gulminelli, Francesca & Röpke, Gerd
  
• Light element (Z=1, 2) production from spontaneous ternary fission of Cf-252. Eur. Phys. J. A 56, 238.
  Röpke, Gerd
  
• Medium modifications for light and heavy nuclear clusters in simulations of core collapse supernovae: Impact on equation of state and weak interactions. Physical Review C, 102(5).
  Fischer, Tobias; Typel, Stefan; Röpke, Gerd; Bastian, Niels-Uwe F. & Martínez-Pinedo, Gabriel
  
• Nonequilibrium Pion Distribution within the Zubarev Approach. Particles, 3(2), 380-393.
  Blaschke, David; Röpke, Gerd; Voskresensky, Dmitry N. & Morozov, Vladimir G.
  
• Equation of Motion Method for strongly correlated Fermi systems and Extended RPA approaches. Physics Reports, 929, 1-84.
  Schuck, P.; Delion, D.S.; Dukelsky, J.; Jemai, M.; Litvinova, E.; Röpke, G. & Tohyama, M.
  
• Nonequilibrium information entropy approach to ternary fission of actinides. Physical Review C, 103(6).
  Röpke, G.; Natowitz, J. B. & Pais, H.
  
• Properties of ^{8-11}Be isotopes with isospin-dependent spin–orbit potential in a cluster approach. The European Physical Journal A, 57(2).
  Lyu, Mengjiao; Ren, Zhongzhou; Horiuchi, Hisashi; Zhou, Bo; Funaki, Yasuro; Röpke, Gerd; Schuck, Peter; Tohsaki, Akihiro; Xu, Chang & Yamada, Taiichi
  
• α-cluster formation and decay: The role of shell structure. Phys. Rev. C 104, 034302.
  Yang, Shuo; Xu, Chang & Röpke, Gerd
  
• Investigating the proton-halo structure of $$^8$$B via the extended THSR wave function. The European Physical Journal A, 58(3).
  Lei, Songju; Li, Songjie; Zhao, Qing; Wan, Niu; Lyu, Mengjiao; Ren, Zhongzhou; Horiuchi, Hisashi; Röpke, Gerd; Schuck, Peter; Tohsaki, Akihiro; Xu, Chang & Zhou, Bo
  
• Employing ternary fission of 242Pu as a probe of very neutron-rich matter. Phys. Rev. C 107, 014618.
  Natowitz, J. B.; Pais, H. & Röpke, G.
  
• The 5α condensate state in 20Ne. Nature Communications, 14(1).
  Zhou, Bo; Funaki, Yasuro; Horiuchi, Hisashi; Ma, Yu-Gang; Röpke, Gerd; Schuck, Peter; Tohsaki, Akihiro & Yamada, Taiichi
  
• Thermodynamics of quark matter with multiquark clusters in an effective Beth-Uhlenbeck type approach. The European Physical Journal A, 60(1).
  Blaschke, D.; Cierniak, M.; Ivanytskyi, O. & Röpke, G.