Tensor analyzing powers for ${}^7\mathrm{Li}$ induced transfer breakup reactions

The $T_{20}$ analyzing powers have been measured for the ${}^{120}\mathrm{Sn}\left({}^7\mathrm{Li},{}^8\mathrm{Be}\to 2\alpha \right){}^{119}\mathrm{In}$ and ${}^{120}\mathrm{Sn}\left({}^7\mathrm{Li},{}^6\mathrm{Li}^{*}\to \alpha +d\right){}^{121}\mathrm{Sn}$ transfer breakup reactions, using a $70\mathrm{MeV}$ beam. The data exhibit excellent agreement with the results of coupled reaction channels calculations, providing an important test of these calculations when applied to the transfer breakup reaction mechanism.

Figure 1

Coupling scheme for ${}^{120}\mathrm{Sn}\left({}^7\mathrm{Li},{}^8\mathrm{Be}\to 2\alpha \right){}^{119}\mathrm{In}$ CRC calculations. The spins and parities refer to the projectile∕ejectile.

Figure 2

Coupling scheme for ${}^{120}\mathrm{Sn}\left({}^7\mathrm{Li},{}^6\mathrm{Li}^{*}\to \alpha +d\right){}^{121}\mathrm{Sn}$ CRC calculations. The spins and parities refer to the projectile∕ejectile.

Figure 3

Results of CRC calculations for the ${}^{120}\mathrm{Sn}\left({}^7\mathrm{Li},{}^8\mathrm{Be}\to 2\alpha \right){}^{119}\mathrm{In}$ ground state reaction compared with data (ground and $0.31\mathrm{MeV}$ states in ${}^{119}\mathrm{In}$ are unresolved). The dotted line excludes ${}^7\mathrm{Li}$ reorientation and excitation while the solid line is for the full coupling scheme of Fig. 1.

Figure 4

Results of CRC calculations for the ${}^{120}\mathrm{Sn}\left({}^7\mathrm{Li},{}^8\mathrm{Be}\to 2\alpha \right){}^{119}\mathrm{In}$ reaction compared with data (ground and $0.31\mathrm{MeV}$ states in ${}^{119}\mathrm{In}$ are unresolved). The solid and dotted lines assume population of the ${}^{119}\mathrm{In}$ $9∕2^{+}$ ground state and $0.31\mathrm{MeV}$ $1∕2^{-}$ first excited state, respectively.

Figure 5

Results of CRC calculations without detector phase space correction for the ${}^{120}\mathrm{Sn}\left({}^7\mathrm{Li},{}^6\mathrm{Li}^{*}\to \alpha +d\right){}^{121}\mathrm{Sn}$ reaction. The data shown are effective $T_{20}$. The dotted, solid, and dashed lines assume population of the ${}^{121}\mathrm{Sn}$ $3∕2^{+}$ ground state, the $11∕2^{-}$ state at $0.006\mathrm{MeV}$ and the $1∕2^{+}$ state at $0.06\mathrm{MeV}$, respectively.

Figure 6

Results of CRC calculations including detector phase space correction for the ${}^{120}\mathrm{Sn}\left({}^7\mathrm{Li},{}^6\mathrm{Li}^{*}\to \alpha +d\right){}^{121}\mathrm{Sn}$ reaction to ${}^{121}\mathrm{Sn}$ (a) states around $2.7\mathrm{MeV}$, (b) states around $1.2\mathrm{MeV}$, and (c) unresolved ground, 0.006 and $0.06\mathrm{MeV}$ states. The data shown are effective $T_{20}$. The dotted, solid, and dashed lines assume population of the ${}^{121}\mathrm{Sn}$ $3∕2^{+}$ ground state, the $11∕2^{-}$ state at $0.006\mathrm{MeV}$, and the $1∕2^{+}$ state at $0.06\mathrm{MeV}$ in ${}^{121}\mathrm{Sn}$, respectively.