Spectroscopy of Element 115 Decay Chains

Abstract

Spectroscopy of Element 115 Decay Chains

Selected spectroscopic results on element 115 decay chains

“…To account for this issue, each count in the spectrum can be best replaced by a Gaussian distribution with the centroid being the measured energy and the width corresponding to the reported uncertainty, as they are listed in the respective tables of Refs. [19,21]. The continuous energy distribution in panel (e) thus represents the sum of these Gaussian-shaped distributions.…”

“…1(b) is the hitherto best studied of all those produced in any of the 48 Ca-plus-actinide-target reactions [5][6][7]; not only in terms of plain statistics, but thanks to our experiment also in view of spectroscopic precision. This is highlighted by having measured the first α-γ coincidences and α-X-ray candidates for Z identification of these very heavy nuclei [19].…”

“…[17]), and they are characteristic for a given proton, hence atomic number [18]. In addition, high-resolution α-photon coincidence spectroscopy such as performed on element Z = 115 decay chains closes in towards nuclear structure studies near the 'Island of Stability' [19].…”

“…In several publications, more details can be found on the preparations of our experiment [28,29], its set-up [24], the experiment itself [19,25], data analysis procedures [26] as well as discussions related to the remaining 30 − 22 = 8 chains also associated with isotopes of element Z = 115 [25]. Monte-Carlo simulations [panels (a)-(c)] using the corresponding proposed decay schemes displayed in Fig.…”

“…Position and time correlations of implanted ions and their decays are subsequently being searched for in the data, which in the present case has a volume in excess of 2 TB accounting for 1.5×10 8 stored events. In this haystack, in total 30 correlated α-decay chains could be discriminated and attributed to the observation of three isotopes of element Z = 115 [19,[25][26][27]. [ 20,21].…”