Low energy structures in nuclear reactions with 4n in the final state

Abstract

We present a reaction model to describe the fast removal of the $\alpha$-particle core in ${}^8$He nucleus with eventual emission of four neutrons. The obtained four neutron energy distributions allows to explain the sharp low energy peak observed by studying the missing mass spectra of four neutrons in [Nature Vol. 606, p. 678], as a consequence of dineutron-dineutron correlations.

arXiv commentAccepted to PRL

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• A Vision for the Science of Rare Isotopes
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• Search for particle-stable tetraneutrons in thermal fission of ${}^{235}$U
• Complex-energy eigenvector continuation for nuclear many-body broad resonances
• Searching for the Tetraneutron Resonance on the Lattice
• Polaronic neutron in dilute alpha matter: A $p$-wave Bose polaron
• Dineutron clusters in ${}^7$He and ${}^8$He structure
• Resonances and collisional properties of neutron-rich helium isotopes in the adiabatic hyperspherical representation
• Direct observation of three-neutron emission from ${}^7$He${}^{\ast }$ and the search for the trineutron
• Calculation of tetraneutron-induced reaction cross sections with optical and Hauser-Feshbach statistical models
• Short-distance production of three particles with large scattering length
• Physics of many-body resonances with complex scaling and applications to light unstable nuclei
• Tetraneutron resonance and its isospin analogues
• Method to search for the triple-neutron state in an electron scattering experiment