Low-lying 128I excited states from the (n, γ) reaction

High-spin level scheme of doubly odd128I

“…The 282.6-keV γ ray populating the 269.6-keV level reported in Ref. [22] has been also observed in this experiment. Additionally, the 117.8-keV linking transition connecting the bandlike level structure B and the 167.4-keV isomer has been observed in the present work [see the gated spectrum of Fig.…”

“…Two γ rays of 58.7 and 102.2 keV were assigned to feed the (6 − ) state [22]. These two γ rays and their dipole character can be firmly confirmed in our data by several parallel crossover and cascade transitions in the level structure A.…”

“…Many low-lying states in 128 I were identified in the previous work [22,23], and a high-spin level scheme was reported by Zheng et al [24] recently, but without excitation energy and spin-and-parity assignments. The purpose of the present study is to complete the systematics of level structures in doubly odd iodine isotopes, which is necessary for a deeper understanding of nuclear structures of transitional nuclei in the A ∼ 130 mass region, and to see whether collective characters still exist in the heavier odd-odd 128 I nucleus when the neutron number approaches the N = 82 closed shell.…”

“…[24]. We note that a 102-keV γ ray of M1 character was identified in the (n, γ ) reaction [22]. Through detailed analysis on the γ -γ coincidence relationships, we find that the photon peaks shown in Fig.…”

“…Prior to this work, low-spin states in 128 I were investigated via the (n,γ ), (d,p), and (d,t) reactions by Sakharov et al [22] and via the (p,n) reaction by Bured et al [26]. Recently, a high-spin level scheme of 128 I was reported by Zheng et al through in-beam measurements [24].…”