Parts | Days | Selection | Search | Downloads | Help
HK: Hadronen und Kerne
HK 63: Spectroscopy: 180 ≤ A ≤ 208
HK 63.2: Talk
Thursday, March 19, 1998, 14:15–14:30, D
The nuclear g-factors of high-spin isomers in 190,192,194Pt — •A.I. Levon1, J. de Boer1, O.V. Sevastjuk2, and P. Alexa3 — 1Sektion Physik, Ludwig-Maximilians-Univ. München, Garching — 2Inst. for Nuclear Research, Kiev, Ukraine — 3Institute of Chemical Technology, Prague, Czech Republik
The integral perturbed angular distributions (IPAD) method in an external magnetic field
has been used to measure the g-factors of isomers in
the 190,192,194Pt nuclei, populated by the (α,2n)-reaction.
The results are as follows: 190Pt, g(10−) = 0.009(8), g(7−) = 0.46(35);
192Pt, g(12+) = -0.17(8), g(10−) = 0.010(6), g(7−) = 0.39(16);
194Pt, g(10+) = -0.13(5), g(7−) = 0.37(15).
The intrinsic structure of the isomers is discussed. The 12+ states have the
rotational-aligned (ν i13/2−2) structure. The missing rotation-aligned
(νi13/2−2)12+ state is suggested in 194Pt which has to be isomeric
(instead of the 10+ state) and to which in fact the g=-0.13(5) value has to be attributed.
>From the g-factors of the 10− in 190Pt and 192P state with the configuration
9/2−[505]+11/2+[615] the anomalous
gl-factor for neutrons has been derived as δgl = -0.032(6).
The positive values of the g-factors of
the 7− states indicate a change in the intrinsic structure of the negative-parity bands
from mainly (ν i13/2−2) to mainly (π
h11/2−2) in
going from the Hg isotopes to those of Pt.
Supported by DFG grant Bo1109/1 and WTZ