Spectroscopy of element 115 decay chains.

Authors :: Rudolph D
Forsberg U
Golubev P
Sarmiento LG
Yakushev A
Andersson LL
Di Nitto A
Düllmann ChE
Gates JM
Gregorich KE
Gross CJ
Heßberger FP
Herzberg RD
Khuyagbaatar J
Kratz JV
Rykaczewski K
Schädel M
Åberg S
Ackermann D
Block M
Brand H
Carlsson BG
Cox D
Derkx X
Eberhardt K
Even J
Fahlander C
Gerl J
Jäger E
Kindler B
Krier J
Kojouharov I
Kurz N
Lommel B
Mistry A
Mokry C
Nitsche H
Omtvedt JP
Papadakis P
Ragnarsson I
Runke J
Schaffner H
Schausten B
Thörle-Pospiech P
Torres T
Traut T
Trautmann N
Türler A
Ward A
Ward DE
Wiehl N
Source :: Physical review letters [Phys Rev Lett] 2013 Sep 13; Vol. 111 (11), pp. 112502. Date of Electronic Publication: 2013 Sep 10.
Publication Year :: 2013
Abstract: A high-resolution α, x-ray, and γ-ray coincidence spectroscopy experiment was conducted at the GSI Helmholtzzentrum für Schwerionenforschung. Thirty correlated α-decay chains were detected following the fusion-evaporation reaction 48Ca + 243Am. The observations are consistent with previous assignments of similar decay chains to originate from element Z=115. For the first time, precise spectroscopy allows the derivation of excitation schemes of isotopes along the decay chains starting with elements Z>112. Comprehensive Monte Carlo simulations accompany the data analysis. Nuclear structure models provide a first level interpretation.