Page 171 - Radiochemistry and nuclear chemistry
P. 171
Absorption of Nuclear Radiation 155
FIG. 6.25. Decay scheme of 19lOs and principle of a M/issbauer experiment.
- 46 X 10 -3 eV). Also, in order for the 129 keV v-ray to be absorbed in 191Ir, it must
arrive with an excess energy of 46 x 10 -3 eV to provide for the conservation of momentum
of the absorbing atom. Thus there is a deficit of 2 x 46 x 10-3 eV, which is very different
from the value of the very narrow energy width of the ",/-ray. Consequently, no resonance
absorption can take place.
FIG. 6.26. M6ssbauer spectrum of 191It metal. (From R. M6ssbauer.)
