6533b825fe1ef96bd12820ac
RESEARCH PRODUCT
Zeptosecond contact times for element Z=120 synthesis
J. KhuyagbaatarJ.f. SmithNikolai R. LobanovElizabeth WilliamsCedric SimenelAlexander YakushevE.v. PrasadNorbert TrautmannKazuyuki SekizawaKazuyuki SekizawaK. Vo-phuocMahananda DasguptaCh. E. DüllmannC. SenguptaC. MokryJ. WalsheKaitlin CookBettina LommelPetra Thörle-pospiechIan CarterBirgit KindlerKlaus EberhardtD. Y. JeungSunil KalkalEdward SimpsonH. M. AlbersD. C. RaffertyJörg RunkeDavid Hindesubject
PhysicsNuclear and High Energy PhysicsWork (thermodynamics)FusionSuperheavy-element formationProton010308 nuclear & particles physicsFissionProjectile01 natural scienceslcsh:QC1-9993. Good healthYield (chemistry)Quasifission0103 physical sciencesCoulombNuclear fusionddc:530Atomic physics010306 general physicsZ=120lcsh:Physicsdescription
The synthesis of new superheavy elements beyond oganesson (Z=118) requires fusion reactions with projectile nuclei with proton numbers larger than that of $^{48}$Ca (Z=20), which has been successfully employed for the synthesis of elements with Z=112-118. In such reactions, fusion is drastically hindered by fast non-equilibrated dynamical processes. Attempts to produce nuclei with Z=120 using the $^{64}$Ni+$^{238}$U, $^{58}$Fe+$^{244}$Pu, $^{54}$Cr+$^{248}$Cm, and $^{50}$Ti+$^{249}$Cf reactions have been made, which all result in larger Coulomb forces than for $^{48}$Ca-induced reactions, but no discovery has been confirmed to date. In this work, mass and angle distributions of fission fragments from these reactions have been measured with large angular coverage to aid in selection of the most promising projectile-target combination that would favor fusion. The results yield information on reaction contact times, with the longest exhibited by $^{50}$Ti+$^{249}$Cf.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-09-01 | Physics Letters |