Investigation of the243Am+48Careaction products previously observed in the experiments on elements 113, 115, and 117

Abstract

Results from the production and decay properties of element 115 nuclei observed using the reaction 243

Alpha-Photon Coincidence Spectroscopy Along Element 115 Decay Chains

“…[18]. Measured decay properties such as α-particle energies, lifetimes, and decay modes of 5-α-decay-long chains associated with the 3n-(22 chains) and 4n-(1 chain) evaporation channels, respectively, are in agreement with those 31 and 2 chains recently presented in Ref.…”

“…Measured decay properties such as α-particle energies, lifetimes, and decay modes of 5-α-decay-long chains associated with the 3n-(22 chains) and 4n-(1 chain) evaporation channels, respectively, are in agreement with those 31 and 2 chains recently presented in Ref. [18]. This leads us to conclude that we have observed the decay sequences of the same nuclei as were formerly observed by Oganessian et al Collecting and averaging all data published so far gives rise to the two decay sequences shown in Fig.…”

“…[16,18] is illustrated in Fig. 3, which provides correlation times of the 5 α-decay steps and the spontaneous fission along the chains associated with 288 115.…”

“…We have studied the nuclear reaction 48 Ca+ 243 Am at two beam energies, both close to the maximum cross section of the anticipated 3n-evaporation channel leading to 288 115 [18]. A beam integral of about 6 × 10 18 was collected over a period of three weeks with a typical beam intensity of 6×10 12 48 Ca ions per second.…”

“…Correspondingly, a high-resolution α-photon coincidence spectroscopy experiment was conducted to investigate decay chains supposedly originating from element 115 [16]. Here, we focus on details of the Ge-detector analysis, further Monte-Carlo simulations, and assessments of the hitherto available published data on the isotopes 287,288 115 [16][17][18].…”