The g factors of the 2(1)(+) and 4(1)(+) states in Kr-78,Kr-80,Kr-82,Kr-84,
Kr-86 have been measured for the first time, using Coulomb excitation of is
otopic Kr beams and the transient field technique. The measured g factors o
f 2(1)(+) states in Kr-78,Kr-80,Kr-82 are well described, in both magnitude
and progression with neutron number, by the IBA-II model. Whereas the ligh
ter isotopes show a dominant collective structure with g factor values clos
e to Z/A, the large g(2(1)(+)) = 1.12(14) value of Kr-86, with its closed N
= 50 shell, is unequivocally dominated by specific proton configurations.
The g factor of the 2(1)(+) state in Kr-84, with two holes in the 1g(9/2) n
eutron orbit, reflects both proton and neutron components in the wave funct
ion. In addition, the lifetimes of several 2(1)(+) and 4(1)(+) states were
remeasured by the Doppler shift attenuation method, yielding values which,
in some cases, differ from those in the literature.