Triple α Resonances in the Decay of Hot Nuclear Systems *

Abstract

The Efimov (Thomas) trimers in excited 12 C nuclei, for which no observation exists yet, are discussed by means of analyzing the experimental data of 70(64) Zn( 64 Ni) + 70(64) Zn( 64 Ni) reactions at beam energy of E/A=35MeV/nucleon. In heavy ion collisions, the αs interact with each other and can form complex systems such as 8 Be and 12 C. For the 3α systems, multi resonance processes give rise to excited levels of 12 C. The interaction between any two of the 3α particles provides events with one, two or three 8 Be. Their interfering levels are clearly seen in the minimum relative energy distributions. Events of three couple α relative energies consistent with the ground state of 8 Be are observed with the decrease of the instrumental error at the reconstructed 7.458 MeV excitation energy of 12C, which was suggested as the Efimov (Thomas) state.

5 pages,7figures

References in corpus (20)

• Universality in Few-body Systems with Large Scattering Length
• Evidence for Efimov quantum states in an ultracold gas of cesium atoms
• Alpha cluster condensation in 12C and 16O
• Observation of an Efimov spectrum in an atomic system
• Alpha-particle condensation in 16O via a full four-body OCM calculation
• Observation of the Second Triatomic Resonance in Efimov's Scenario
• Application of Information Theory in Nuclear Liquid Gas Phase Transition
• Shannon Information Entropy in Heavy-ion Collisions
• Critical Behavior in Light Nuclear Systems: Experimental Aspects
• Evidence for $\alpha$-particle condensation in nuclei from the Hoyle state deexcitation
• High precision probe of the fully sequential decay width of the Hoyle state in ${}^{12}$C
• The many facets of the (non relativistic) Nuclear Equation of State
• Universality and scaling in the $N$-body sector of Efimov physics
• Production mechanism of neutron-rich nuclei around $N=126$ in multi-nucleon transfer reaction ${}^{132}$Sn + ${}^{208}$Pb
• Decay Modes of the Hoyle State in ${}^{12}C$
• Signals of Bose Einstein condensation and Fermi quenching in the decay of hot nuclear systems
• Alpha Conjugate Neck Structures in the Collisions of 35 MeV/nucleon 40Ca with 40Ca
• Strongly Resonating Bosons in Hot Nuclei
• Sequential Decay Distortion of Goldhaber Model Widths for Spectator Fragments
• Competition between fermions and bosons in nuclear matter at low densities and finite temperatures

Cited by in corpus (4)

• Dipole excitation of ${}^6$Li and ${}^9$Be studied with an extended quantum molecular dynamics model
• Strongly Resonating Bosons in Hot Nuclei
• Network structure of thermonuclear reactions in nuclear landscape
• Reaction rate weighted multilayer nuclear reaction network