In order to investigate the possibility of an enhancement in the IVSL to
IVST ratio in QF scattering using a pure isovector probe it is necessary
to use a
charge-exchange reaction such as 
or 
.
A series of experiments was carried
out using the 
reaction at the Neutron Time-of-Flight
(NTOF) facility at LAMPF. These results are reported in [Tad94],
[Che93], and [Lut93].
These measurements were done on 
, 
, and
at 494 MeV at scattering angles of 
,
, and 
(q = 1.2, 1.7, and 2.5 
).
Figure: Ratio of IVSL to IVST responses for
at 494 MeV. The dashed lines show
results from full RPA + DWIA calculations. [Tad94].
The results
for the 
scattering are shown in
figure 
.
One can see from figure that, in fact, the Alberico
et al.
calculations (shown with the dashed line) fail to reproduce the data.
There again seems to be no indication of a collective enhancement of the
IVSL relative to the IVST responses in the nucleus.