TABLE I: Electric quadrupole transition strengths are shown in the Weisskopf unit. J$_{i}$ and J$_{f}$ indicate initial and final states, respectively. The blanks under theoretical values indicate that calculated B ( E 2) values are almost zero. As for the transitions labeled “—” under experimental values, γ decays have been observed, but multipolarities and strengths have not been measured. The experimental data are taken from Ref. 24. The observed (2 , 3 , 4) + state at 5.17 MeV is noted as the 4 + $_{SD2}$. J$_{i}$ J$_{f}$ theory experiments 2 + GS 0 + GS 6.18 9 . 3 ± 0 . 4 4 + GS 2 + GS 6.65 4 . 8 ± 1 . 0 6 + GS 4 + GS 3.84 1 . 67 ± 0 . 05 2 + SD0 0 + SD0 55.62 4 + SD0 2 + SD0 78.54 47 ± 19 6 + SD0 4 + SD0 84.64 70 ± 30 3 + SD2 2 + SD2 95.96 4 + SD2 3 + SD2 70.75 4 + SD2 2 + SD2 31.86 5 + SD2 4 + SD2 50.13 5 + SD2 3 + SD2 50.72 6 + SD2 5 + SD2 31.38 6 + SD2 4 + SD2 53.84 2 + SD2 2 + SD0 1.55 — 2 + SD2 0 + SD0 0.92 1 . 2 ± 0 . 3 3 + SD2 2 + SD0 1.64 — 4 + SD2 4 + SD0 1.88 — 4 + SD2 2 + SD0 0.44 0 + SD0 2 + GS 6 . 2 ± 2 . 0 2 + SD0 2 + GS 13 ± 7 2 + SD0 0 + GS 1 . 32 ± 0 . 13 4 + GS 2 + SD0 42 ± 23 4 + SD0 2 + GS 8 . 1 ± 1 . 8 6 + SD0 4 + GS 7 ± 3 9