The reduced transition probabilities $B(E2;0_{\text{g.s.}}^{+}\to 2_1^{+},2_2^{+})$ in ${}^{70}\mathrm{Zn}$ and the full $B(E2;0_{\text{g.s.}}^{+}\to 2^{+})$ strength up to ${\mathrm{S}}_n=7.79\mathrm{MeV}$ in ${}^{68}\mathrm{Ni}$ have been determined at the LISE/GANIL facility using the Coulomb-excitation technique at intermediate beam energy on a ${}^{208}\mathrm{Pb}$ target. The $\gamma$ rays emitted in-flight were detected with an array of $46{\mathrm{BaF}}_2$ crystals. The angles of the deflected nuclei were determined in order to disentangle and extract the Coulomb and nuclear contributions to the excitation of the $2^{+}$ states. The measured $B(E2;0_{\text{g.s.}}^{+}\to 2_1^{+})$ of 1432(124) $e^2{\mathrm{fm}}^4$ for ${}^{70}\mathrm{Zn}$ falls in the lower part of the published values which clustered either around 1600 or above $2000e^2{\mathrm{fm}}^4$, while the $B(E2;0_{\text{g.s.}}^{+}\to 2_2^{+})$ of 53(7) $e^2{\mathrm{fm}}^4$ agrees very well with the two published values. The relatively low $B(E2;0_{\text{g.s.}}^{+}\to 2_1^{+})$ of 301(38) $e^2{\mathrm{fm}}^4$ for ${}^{68}\mathrm{Ni}$ agrees with previous studies and confirms a local magicity at $Z=28$, $N=40$. Combining the results of the low-energy spectra of ${}^{68}\mathrm{Ni}$ and ${}^{70}\mathrm{Zn}$ and their shell-model interpretations, it is interesting to notice that four different shapes (spherical, oblate, prolate, and triaxial) are present. Finally, a summed $E2$ strength of only about $150e^2{\mathrm{fm}}^4$ has been found experimentally at high excitation energy, likely due to proton excitations across the $Z=28$ gap. The experimental distribution of this high-energy $E2$ excitation agrees with shell-model calculations, but its strength is about two times weaker.

中文翻译：

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中能Zn70和Ni68的库仑激发和核激发

降低的转移概率 $乙(乙2;0_{\text{GS}}^{+}\to 2_1^{+},2_2^{+})$ 在 ${}^{70}锌$ 和完整的 $乙(乙2;0_{\text{GS}}^{+}\to 2^{+})$ 强度高达 ${\mathrm{秒}}_n=7.79\mathrm{电动汽车}$ 在 ${}^{68}你$ 已在 LISE/GANIL 设施中使用库仑激发技术在中等光束能量下确定 ${}^{208}铅$目标。这$\gamma$ 飞行中发射的射线被检测到 $46{\mathrm{氟化硼}}_2$晶体。确定偏转核的角度，以便解开和提取库仑和核对激发激发的贡献。$2^{+}$状态。被测$乙(乙2;0_{\text{GS}}^{+}\to 2_1^{+})$ 1432(124) ${\mathrm{电子}}^2{\mathrm{调频}}^4$ 为了 ${}^{70}锌$ 落在公布值的较低部分，聚集在 1600 左右或以上 $\mathrm{2000年}{\mathrm{电子}}^2{\mathrm{调频}}^4$，而 $乙(乙2;0_{\text{GS}}^{+}\to 2_2^{+})$ 共 53(7) ${\mathrm{电子}}^2{\mathrm{调频}}^4$与两个公布的值非常吻合。相对较低$乙(乙2;0_{\text{GS}}^{+}\to 2_1^{+})$ 共 301(38) ${\mathrm{电子}}^2{\mathrm{调频}}^4$ 为了 ${}^{68}你$ 与之前的研究一致并证实了当地的魔力 $Z=28$, $N=40$. 结合低能谱的结果${}^{68}你$ 和 ${}^{70}锌$以及它们的壳模型解释，有趣的是注意到存在四种不同的形状（球形、扁圆形、扁长形和三轴）。最后总结一下$乙2$ 强度仅约 $150{\mathrm{电子}}^2{\mathrm{调频}}^4$ 已经在高激发能量下通过实验发现，可能是由于质子激发穿过 $Z=28$差距。这种高能的实验分布$乙2$ 激发与壳模型计算一致，但其强度大约弱两倍。