ELFT HÍRADÓ

[Zoltan Mate <mate AT namafia.atomki.hu>]

Az MTA Atommagkutató Intézetének előadótermében
(Debrecen, Bem tér 18/c. 12. ép. III. em.)
2011. november 16-án, SZERDÁN 11:00-kor


                 Chavdar STOYANOV
   (Institute for Nuclear Research and Nuclear Energy, 
         Bulgarian Academy of Sciences) 

  Valence shell excitations in even-even spherical nuclei
              within microscopic model  


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


                                           Máté Zoltán


Kivonat

A microscopic multiphonon approach is adopted to investigate the  
structure of some low-lying states  observed experimentally in the N=80 
and N=84 isotones. The calculation yields levels and electromagnetic 
transition strengths in good agreement with experiments and relates the 
observed selection rules to the neutron-proton symmetry  and phonon 
content of the observed states. Moreover, it ascribes the splitting of the 
M1 strength  in  138Ce  to the proton subshell closure which magnifies the 
role of pairing in  the excitation mechanism [1]. In 144Nd and 142Ce the 
splitting of M1 strength is due to the interplay of collective and 
slightly collective quadrupole components [2].


1. N. Lo Iudice, Ch. Stoyanov, D. Tarpanov, Phys. Rev. C , 77 (2008) 044310
2. N. Lo Iudice, Ch. Stoyanov, N. Pietralla, Phys. Rev. C, 80 (2009) 024311