Spectroscopy of element 115 decay chains

115番元素の崩壊連鎖における核分光研究

Rudolph, D.*; Forsberg, U.*; Golubev, P.*; Sarmiento, L. G.*; Yakushev, A.*; Andersson, L. L.*; Di Nitto, A.*; Dllmann, Ch. E.*; Gates, J. M.*; Gregorich, K. E.*; Gross, C. J.*; Heberger, F. P.*; Herzberg, R.-D.*; Khuyagbaatar, J.*; Kratz, J. V.*; Rykaczewski, K.*; Schdel, M.; berg, S.*; Ackermann, D.*; Block, M.*; Brand, H.*; Carlsson, B. G.*; Cox, D. M.*; Derkx, X.*; Eberhardt, K.*; Even, J.*; Fahlander, C.*; Gerl, J.*; Jger, E.*; Kindler, B.*; Krier, J.*; Kojouharov, I.*; Kurz, N.*; Lommel, B.*; Mistry, A.*; Mokry, C.*; Nitsche, H.*; Omtvedt, J. P.*; Papadakis, P.*; Ragnarsson, I.*; Runke, J.*; Schaffner, H.*; Schausten, B.*; Thrle-Pospiech, P.*; Torres, T.*; Traut, T.*; Trautmann, N.*; Trler, A.*; Ward, A.*; Ward, D. E.*; Wiehl, N.*

Rudolph, D.*; Forsberg, U.*; Golubev, P.*; Sarmiento, L. G.*; Yakushev, A.*; Andersson, L. L.*; Di Nitto, A.*; Dllmann, Ch. E.*; Gates, J. M.*; Gregorich, K. E.*; Gross, C. J.*; Heberger, F. P.*; Herzberg, R.-D.*; Khuyagbaatar, J.*; Kratz, J. V.*; Rykaczewski, K.*; Schdel, M.; berg, S.*; Ackermann, D.*; Block, M.*; Brand, H.*; Carlsson, B. G.*; Cox, D. M.*; Derkx, X.*; Eberhardt, K.*; Even, J.*; Fahlander, C.*; Gerl, J.*; Jger, E.*; Kindler, B.*; Krier, J.*; Kojouharov, I.*; Kurz, N.*; Lommel, B.*; Mistry, A.*; Mokry, C.*; Nitsche, H.*; Omtvedt, J. P.*; Papadakis, P.*; Ragnarsson, I.*; Runke, J.*; Schaffner, H.*; Schausten, B.*; Thrle-Pospiech, P.*; Torres, T.*; Traut, T.*; Trautmann, N.*; Trler, A.*; Ward, A.*; Ward, D. E.*; Wiehl, N.*

A high-resolution X-ray and -ray coincidence spectroscopy experiment was conducted at the GSI Helmholtzzentrum fr Schwerionenforschung. Thirty correlated decay chains were detected following the fusion-evaporation reaction Ca + Am. 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.