High-spin states of 109 Ag have been studied using the 7 Li + 110 Pd reaction at a beam energy of 46 MeV. A negative-parity band decaying to the ground-state band by several new linking transitions is established. Meanwhile, seven new E 2 crossover transitions of this band are observed, thereby confirming the spin-parity assignment and ordering of the dipole transitions above the I π = 19/2 − level. A low energy γ-ray transition of 88 keV is found and placed at the bottom of the negative-parity band, and thus the I π = 17/2 − level is tentatively assigned as the lowest observed state of this band. Experimental excitation energies and total angular momenta of the negative-parity band are compared with the predictions of self-consistent titled axis cranking relativistic mean-field theory with a three-quasiparticle configuration of ##IMG## {$\pi {\mathrm{g}}...}

中文翻译：

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109 Ag核中可能存在的“订书机”带

使用7 Li + 110 Pd反应以46 MeV的束能量研究了109 Ag的高自旋态。建立了通过几个新的链接跃迁衰减到基态带的负奇偶校验带。同时，观察到该频带的七个新的E 2交叉跃迁，从而确认自旋奇偶性分配和高于Iπ= 19/2-的偶极跃迁的顺序。发现88 keV的低能量γ射线跃迁，并将其放置在负奇偶校验带的底部，因此将Iπ= 17/2-能级暂定为该带的最低观察状态。