The influence of experimental setup on the spectroscopy investigation of ${}^{14}$Be by Coulomb breakup reaction

Abstract

The two-body core+$2n$ cluster structure was implemented to describe the two-neutron halo nucleus ${}^{14}\mathrm{Be}$, where the core${}^{12}\mathrm{Be}$ was assumed inert and at ground state and the dineutron was assumed at pure $2S_0$ state. Based on such a structure the three-body continuum-discretized coupled-channel (CDCC) calculation was successfully used to deal with the ${}^{14}\mathrm{Be}$ breakup reactions of ${}^{14}\mathrm{Be}{+}^{12}\mathrm{C}$ at 68~MeV/nucleon and ${}^{14}\mathrm{Be}+$Pb at 35~MeV/nucleon.Consequently, we modeled the kinematically complete measurement experiment of ${}^{14}\mathrm{Be}$ (35~MeV/nucleon) Coulomb breakup at a lead target with the help of Geant4. From the simulation data the relative energy spectrum was constructed by the invariant mass method and $B(E1)$ spectrum was extracted using virtual photon model. The influence of the target thickness and detector performance on the spectroscopy was investigated.

6 pages, 5 figures, submitted to Chinese Physics C

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