Observation of the 3
evaporation channel in the complete hot-fusion reaction
Mg +
Cm leading to the new superheavy nuclide
Hs
Dvorak, J.*; Br
chle, W.*; Chelnokov, M.*; D
llmann, Ch. E.*; Dvorakova, Z.*; Eberhardt, K.*; J
ger, E.*; Kr
cken, R.*; Kuznetsov, A.*; Nagame, Yuichiro
; Nebel, F.*; Nishio, Katsuhisa
; Perego, R.*; Qin, Z.*; Sch
del, M.*; Schausten, B.*; Schimpf, E.*; Schuber, R.*; Semchenkov, A.*; Th
rle, P.*; T
rler, A.*; Wegrzecki, M.*; Wierczinski, B.*; Yakushev, A.*; Yeremin, A.*
The analysis of a large body of heavy ion fusion reaction data with medium-heavy projectiles (6
Z
18) and actinide targets suggests a disappearance of the 3
exit channel with increasing atomic number of the projectile. Here, we report a measurement of the excitation function of the reaction
Cm(
Mg,
)
Hs and the observation of the new nuclide
Hs produced in the 3
evaporation channel at a beam energy well below the Bass fusion barrier with a cross section comparable to the maxima of the 4
and 5
channels. This indicates the possible discovery of new neutron-rich transactinide nuclei using relatively light heavy ion beams of the most neutron-rich stable isotopes and actinide targets.