Structure of115Ag studied byβ−decays of115Pd and

J. Rissanen

¹

,

J. Kurpeta

²

,

V.‐V. Elomaa

³

et al.

Abstract

The excited levels of 115 Ag have been studied via the beta decay of 115 Pd and 115 Pd m . The beta-decay schemes for both states have been considerably extended, especially the scheme following the decay of 115 Pd m which was practically unknown before this work. Transition intensities and log 10 f t values are reported, which have been missing in the literature. A set of levels around 2 MeV has been found to be strongly populated by the beta decay of the ground state of 115 Pd and is suggested to have a three-quasiparticle nature. The properties of excited levels have been compared with the level systematics of lighter neutron-rich silver isotopes, and new spin assignments as well as identification of Nilsson states in 115 Ag have been made.

β - and γ -spectroscopy study of Pd119 and AgKurpeta1, Abramuk2, Rza̧ca‐Urban3 et al. 2022Phys. Rev. CSelf Cite3010View full textAdd to dashboardCite

“…6 in Ref. [43] shows a shallow minimum at N = 66. Therefore, in 119 Ag one may expect the respective level to appear above 600 keV but below 800 keV.…”

“…The 787.7-keV level in 115 Ag was interpreted as the π 5/2 − [303] proton excitation stemming from the 1 f 5/2 shell [43]. Its similarity to the 809.2-keV level in 111 Ag of the same configuration was pointed out, too.…”

“…8 of Ref. [43]). To date such bands were not seen in 117 Ag either in β-decay [11,30] or in spontaneous fission studies [44].…”

“…In our study of 115 Ag [43] a general discussion of negative parity levels in odd silver isotopes was presented, including systematics of the relevant states up to 117 Ag. Using the results for 119 Ag obtained in the present paper we extended the systematics of collective, rotational bands shown in Fig.…”

“…The 607.1-keV level in 115 Ag was interpreted as the π 3/2 − [301] Nilsson state originating from the 1 f 5/2 shell [43]. The systematics of 3/2 − levels corresponding to the π 3/2 − [301] excitation seen in Fig.…”