ELFT HÍRADÓ

[Máté Zoltán <mate AT atomki.mta.hu>]

Az MTA Atommagkutató Intézet előadótermében
(Debrecen, Bem tér 18/c. 12. ép. III. em.)
2015. február 26-án, csütörtökön 11:00-kor


                       Naohiko OTSUKA
    (Nuclear Data Section, International Atomic Energy Agency)

  Major nuclear data tools provided from IAEA Nuclear Data Section

                             és

                       Hiromitsu HABA
        (Nishina Center for Accelerator-Based Science, RIKEN)
            
            Superheavy Element Researches at RIKEN


 címmel előadást tartanak.


Az előadás előtt 10:30-tól tea, vendégeket szívesen látunk.

                                                         Máté Zoltán



Abstract (Major nuclear data tools provided from IAEA Nuclear Data Section):

IAEA Nuclear Data Section (NDS) has developed and provided various nuclear 
data tools
for nuclear sciences and applications since 1964. There are both professional 
physicists
and software engineers in NDS, and has continuously worked together for 
better access
to nuclear data. I will briefly introduce two major tools - LiveChart of  
Nuclides
and EXFOR to which there are important contributions from ATOMKI researchers.


      


Abstract (Superheavy Element Researches at RIKEN):

Present status and perspectives of superheavy element (SHE) researches
using the GAs-filled Recoil Ion Separator GARIS at RIKEN are reviewed.
We have been developing a gas-jet transport system coupled to GARIS as
a novel technique for SHE chemistry. The isotopes of 261Rf (atomic
number Z = 104), 262Db (Z = 105), and 265Sg (Z = 106) useful for
chemistry studies were produced in the 248Cm(18O,5n), 248Cm(19F,5n), and
248Cm(22Ne,5n) reactions, respectively, and they were extracted to a
chemistry laboratory by the gas-jet method after the separation by GARIS
[1-4]. The production and decay properties of those isotopes were
investigated in detail for future chemistry studies using a rotating
wheel apparatus for α and SF spectrometry. Recently, the chemical
synthesis and gas-chromatographic analysis of the first organometallic
compound of SHEs, Sg(CO)6, were successfully conducted with the
preseparated 265Sg [5].
 After the observation of the third decay chain of element 113, 278113,
in the cold fusion reaction of 209Bi(70Zn,n)278113 [6], we started
syntheses of the heavier SHEs by hot fusion reactions. As the first step,
the isotopes of element 116, 292,293Lv, were produced in the
248Cm(48Ca,xn)296-xLv reactions [7] to confirm those observed at Dubna
[8,9] and GSI [10]. In 2015, the 248Cm(50Ti,xn)298-x118 reactions are
planned to be studied.

References
[1] H. Haba et al., Chem. Lett. 38, 426 (2009).
[2] H. Haba et al., Phys. Rev. C 83, 034602 (2011).
[3] H. Haba et al., Phys. Rev. C 85, 024611 (2012).
[4] H. Haba et al., Phys. Rev. C 89, 024618 (2014).
[5] J. Even et al., Science 345, 1491 (2014).
[6] K. Morita et al., J. Phys. Soc. Jpn. 81, 103201 (2012).
[7] K. Morita et al., RIKEN Accel. Prog. Rep. 47 (in press).
[8] Yu. Ts. Oganessian et al., Phys. Rev. C 63, 011301(R) (2000).
[9] Yu. Ts. Oganessian et al., Phys. Rev. C 70, 064609 (2004).
[10] S. Hofmann et al., Eur. Phys. J. A 48, 62 (2012).