Internal bremsstrahlung from Pr-143

Abstract

The internal bremsstrahlung (IB) spectrum of ~43pr is measured in the energy region from-40 to 830 keV by using a multichannel NaI(TI) scintillation spectrometer and a standard geometrical set up and corrections are applied for various factors. The measured intensity of IB in the investigated energy region is compared with the corresponding theoretical values of Ford and Martin (direct and detour). The present experimental values of IB are coinciding with the direct theory from 40 to 130 keV while from 130 to 500 keV, they are agreeing fairly well with the detour theory. Above 500 keV, the results are deviating positively even from the detour theory.

Internal Bremsstrahlung from14C and36Cl

“…Under these conditions no satisfactory explanation can be given to the observed experimental excess over theory in this case except concluding that its nature is but like that. In this context it may be noted that this kind of trend of the IB experimental results relative to the theory (KUB) was observed for some of the cases [8,[12][13][14][15][16] investigated earlier such as P-32, Y-91, Pr-143, Y-90 and S-35 where also no satisfactory explanation for the trend could be given. It is interesting to state that no earlier punished work on IB from 14C has been found in the literature available here.…”