Complete Set of Polarization Transfer Observables for the $^{12}{\rm C}(p,n)$ Reaction at 296 MeV and 0$^{\circ}$

Dozono, M.; Wakasa, T.; Ihara, E.; Asaji, S.; Fujita, K.; Hatanaka, K.; Ishida, T.; Kaneda, T.; Matsubara, H.; Nagasue, Y.; Noro, T.; Sakemi, Y.; Shimizu, Y.; Takeda, H.; Tameshige, Y.; Tamii, A.; Yamada, Y.

Complete Set of Polarization Transfer Observables for the $^{12}{\rm C}(p,n)$ Reaction at 296 MeV and 0$^{\circ}$

Authors

Description

A complete set of polarization transfer observables has been measured for the $^{12}{\rm C}(p,n)$ reaction at $T_p=296 {\rm MeV}$ and $θ_{\rm lab}=0^{\circ}$. The total spin transfer $Σ(0^{\circ})$ and the observable $f_1$ deduced from the measured polarization transfer observables indicate that the spin--dipole resonance at $E_x \simeq 7 {\rm MeV}$ has greater $2^-$ strength than $1^-$ strength, which is consistent with recent experimental and theoretical studies. The results also indicate a predominance of the spin-flip and unnatural-parity transition strength in the continuum. The exchange tensor interaction at a large momentum transfer of $Q \simeq 3.6 {\rm fm}^{-1}$ is discussed.
4 pages, 4 figures