First superheavy element experiments at the GSI recoil separator TASCA: The production and decay of element 114 in the {sup 244}Pu({sup 48}Ca,3-4n) reaction

Journal Article · Sun May 15 00:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.83.054618· OSTI ID:21502489

Gates, J M ^[1]; Duellmann, Ch E ^[1]; Schaedel, M; Ackermann, D; Block, M; Bruechle, W; Essel, H G; Hartmann, W; Hessberger, F P; Huebner, A; Jaeger, E; Khuyagbaatar, J; Kindler, B; Krier, J; Kurz, N; Lommel, B; Schaffner, H; Schausten, B; Schimpf, E; Steiner, J ^[1]

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1. GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, D-64291 Darmstadt (Germany)

Experiments with the new recoil separator, Transactinide Separator and Chemistry Apparatus (TASCA), at the GSI were performed by using beams of {sup 48}Ca to irradiate targets of {sup 206-208}Pb, which led to the production of {sup 252-254}No isotopes. These studies allowed for evaluation of the performance of TASCA when coupled to a new detector and electronics system. By following these studies, the isotopes of element 114 ({sup 288-291}114) were produced in irradiations of {sup 244}Pu targets with {sup 48}Ca beams at compound nucleus excitation energies around 41.7 and 37.5 MeV, demonstrating TASCA's ability to perform experiments with picobarn-level cross sections. A total of 15 decay chains were observed and were assigned to the decay of {sup 288-291}114. A new {alpha}-decay branch in {sup 281}Ds was observed, leading to the new nucleus {sup 277}Hs.

• OSTI ID: 21502489
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 83, Issue 5; Other Information: DOI: 10.1103/PhysRevC.83.054618; (c) 2011 American Institute of Physics; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA DECAY
CALCIUM 48 REACTIONS
CHAINS
CROSS SECTIONS
DARMSTADTIUM 281
ELEMENT 114
EXCITATION
HASSIUM 276
HASSIUM ISOTOPES
LEAD 206 TARGET
LEAD 207 TARGET
LEAD 208 TARGET
MEV RANGE 10-100
NEUTRON EMISSION
NOBELIUM 252
NOBELIUM 253
NOBELIUM 254
PLUTONIUM 244 TARGET
RECOILS
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
BETA DECAY RADIOISOTOPES
DARMSTADTIUM ISOTOPES
DECAY
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTS
EMISSION
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
HEAVY ION REACTIONS
HEAVY NUCLEI
HOURS LIVING RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MEV RANGE
MILLISECONDS LIVING RADIOISOTOPES
MINUTES LIVING RADIOISOTOPES
NOBELIUM ISOTOPES
NUCLEAR DECAY
NUCLEAR REACTIONS
NUCLEI
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SPONTANEOUS FISSION RADIOISOTOPES
TARGETS
TRANSACTINIDE ELEMENTS
TRANSPLUTONIUM ELEMENTS
TRANSURANIUM ELEMENTS