Structure of ${}^8\mathrm{Li}$ from a reaction cross-section measurement

We have precisely measured reaction cross sections (${\sigma }_R$) for ${}^8\mathrm{Li}$ using ${}^9\mathrm{Be}$, ${}^{12}\mathrm{C}$, ${}^{27}\mathrm{Al}$, and proton targets at intermediate energies by the transmission method. From the energy dependence of the ${\sigma }_R$ including the high energy data, the density distribution of ${}^8\mathrm{Li}$ was deduced through a modified Glauber model. It is shown that ${}^8\mathrm{Li}$ has a shorter tail structure in the density as compared with that of ${}^8\mathrm{B}$ and the matter radius of ${}^8\mathrm{Li}$ is similar to those of the other nonhalo Li isotopes. The result is consistent with the previous experiments that there is a tendency for ${}^8\mathrm{Li}$ to be a skin nucleus.

Figure 1

Schematic drawing of the experimental setup.

Figure 2

Typical particle identification spectra after the reaction target for the target-in (a) and target-out (b) measurements with the ${}^8\mathrm{Li}$ beam at 86.3 MeV/nucleon.

Figure 3

Typical simulation result for estimating the inelastic scattering events.

Figure 4

Density distribution of ${}^8\mathrm{Li}$ deduced with the fitting procedure using the HO + Yukawa type density function. The shaded areas are errors, respectively.

Figure 5

Density distribution of ${}^8\mathrm{Li}$ deduced with the fitting procedure using HO + SPM type density function. The shaded areas are errors, respectively.

Figure 6

Matter radius of Li isotopes. The closed symbol denotes the present data and open symbols denote data from Refs. [11] and [14].

Figure 7

The total density distribution of ${}^8\mathrm{Li}$ compared with that of ${}^8\mathrm{B}$. The density distribution of ${}^8\mathrm{B}$ is also deduced using MOL by Takechi et al. in Ref. [33].