Determine the spin-parity assignment of the 10240-keV level in 50Ti

Determine whether the 10240-keV excited state in 50Ti corresponds to the Jπ = 1− state observed near 10210 keV or the Jπ = 3− state observed near 10250 keV in the inelastic electron-scattering experiment.

Background

The authors identify a level at 10240(17) keV in 50Ti whose (d,p) angular distribution is best described by an ℓ = 2 transfer, establishing negative parity but not a unique total angular momentum. An inelastic electron-scattering experiment had reported nearby states at 10210(20) keV and 10250(20) keV, associated with E1 and E3 excitations and therefore with Jπ = 1− and 3− assignments, respectively.

Because the excitation-energy information and the transfer data do not distinguish which of these nearby states was populated, the specific spin-parity assignment of the 10240-keV level remains unresolved.

References

We cannot say for certain whether it is the $J{\pi}=1-$ or $3-$ state.

— Detailed experimental study of excited states in $^{50}$Ti via the $(d,p)$ and $(d,pγ)$ reactions  (2609.09412 - Kelly et al., 8 Sep 2026) in Section 3.7, subsection “10014-, 10123-, 10240-keV levels”