Spectroscopy of element 115 decay chains

Rudolph, D.; Forsberg, U.; Golubev, P.; Sarmiento, L. G.; Yakushev, A.; Andersson, L. -L.; Di Nitto, A.; Dullmann, C. E.; Gates, J. M.; Gregorich, K. E.; Gross, C. J.; Hessberger, F. P.; Herzberg, R. -D.; Khuyagbaatar, J.; Kratz, J. V.; Rykaczewski, K.; Schadel, M.; Aberg, S.; Ackermann, D.; Block, M.; Brand, H.; Carlsson, B. G.; Cox, D.; Derkx, X.; Eberhardt, K.; Even, J.; Fahlander, C.; Gerl, J.; Jager, 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.; Thorle-Pospiech, P.; Torres, T.; Traut, T.; Trautmann, N.; Turler, A.; Ward, A.; Ward, D. E.; Wiehl, N.

doi:10.1103/PhysRevLett.111.112502

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.

Spectroscopy of element 115 decay chains / Rudolph, D., Forsberg, U., Golubev, P., Sarmiento, L.G., Yakushev, A., Andersson, L.-L., Di Nitto, A., Dullmann, C.E., Gates, J.M., Gregorich, K.E., Gross, C.J., Hessberger, F.P., Herzberg, R.-D., Khuyagbaatar, J., Kratz, J.V., Rykaczewski, K., Schadel, M., Aberg, S., Ackermann, D., Block, M., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 111:11(2013), p. 112502. [10.1103/PhysRevLett.111.112502]