论文标题
$^{83} $ as的结构，$^{85} $ as and $^{87} $ as：从半魔术到$γ$ -Softness
Structure of $^{83}$As, $^{85}$As and $^{87}$As: from semi-magicity to $γ$-softness
论文作者
论文摘要
$^{83} $ as的结构，$^{85} $ as and $^{87} $，如在Fusion-Fission Reaction中所研究的$^{238} $ u+$^9 $ be。使用VAMOS ++光谱仪在质量和原子数中鉴定出裂变片段，并在$γ$ -Ray -Ray Tracking Agata中检测到一致的$γ$ -rays。 $^{83} $ AS和$^{85} $中的新过渡如报告并放置在级别方案中。第一次提出的$^{87} $中激发状态的级别方案。数据以大规模壳模计算，SU3对称性以及均值场框架的框架进行解释。预计将第一次提出质子数字$ n $ = 50的球形态度$ n $ = 50，首次提出了质子$ g_ {9/2} $ orbital的位置。在开放式外壳案例中$^{85} $ AS和$^{87} $ AS中的$γ$ -soft状态中的集体性开发。数据和理论计算使相对较高的外推激励能的信心约为$^{79} $ cu的$ 9/2^+$状态的4 meV，一个高于$^{78} $ ni的质子。
The structure of $^{83}$As, $^{85}$As and $^{87}$As have been studied in fusion-fission reaction $^{238}$U+$^9$Be. Fission fragments were identified in mass and atomic number using the VAMOS++ spectrometer and the coincident $γ$-rays were detected in the $γ$-ray tracking array AGATA. New transitions in $^{83}$As and $^{85}$As are reported and placed in the level schemes. A level scheme of the excited states in $^{87}$As is proposed for the first time. The data are interpreted in frame of Large-Scale Shell-Model calculations, SU3 symmetries and Beyond Mean-Field frameworks. A spherical regime at magic number $N$=50 is predicted and the location of the proton $g_{9/2}$ orbital is proposed for the first time. Development of collectivity in a prolate deformed, $γ$-soft regime in the open shell cases $^{85}$As and $^{87}$As, most neutron-rich isotopes beyond $N$=50, is concluded. Data and theoretical calculations give confidence to a relatively high extrapolated excitation energy about 4 MeV of the $9/2^+$ state in $^{79}$Cu, one proton above $^{78}$Ni.
