Excitation functions of 3He-particle-induced nuclear reactions on 103Rh: Experimental and theoretical investigations

Excitation functions for the 3He-induced reactions on 103Rh as alternative pathway for the production of the medically used 103Pd were studied by the stacked foil technique. Excitation functions of the 103Rh(3α, x) 103Pd, 103,104,104m,105Ag and 100,101,101m,102,102mRh reactions were determined up to 27 MeV by detecting only the characteristic γ-rays obtained from the decay of residual nuclei. The experimental results were compared with the theoretical ones obtained from the EMPIRE-3.2 code and ‎the TENDL nuclear data library. From the measured cross-section data integral production yields were calculated

On the determination of the thermal neutron flux density by the measurement of the activity ratio Au-199/Au-198

The possibility to measure the flux of thermal neutrons by activation of gold of unknown weight using the counts of both 199Au and 198Au gamma emission was studied. It can be used for impure gold monitors or when the activated sample has gold in it. The possible interferences are discussed

Organic yield of 37Cl(n,gamma)38Cl in binary mixtures of CCl4 and alcohols

PERTESSIS-KEIS has studied the yield of organic 38Cl from the reaction 37Cl(n,g)38Cl in binary mixtures of CCl4 and alcohols. KONTIS and URCH suggested an independent binary model to interpret the data, however, none of their data agree with the model over the whole range of concentrations. In this paper we suggest a new model based on the formation of organic 38Cl by two precursors, one independent on the media (failure to bond rupture), while the other depends on the concentration of the two components in the binary mixture (reactions of hot and thermalized 38Cl). Our model fits all the alcohols studied by PERTESSIS-KEIS1,2 over the whole range of concentration. A plot of 1/(Y0\u2013Y) vs. mA/mB was found to be a straight line for all the six alcohols studied by PERTESSIS-KEI

On the measurement of K-40 in natural and synthetic materials by the method of high-resolution gamma-ray spectrometry

In the measurement of natural occurring radioactive material (NORM) concentrations of K-40, Th-232 and U-238 are measured by passive gamma ray spectrometry with either HPGe or NaI(Tl) detectors. K-40 is measured through its 1460.8 kcVy line. However, till now it has been ignored that this line is mixed with the 1459.2 keV line of Ac-228 from the chain of Th-232. A correction must be made for this contribution. All the data in literature has wrong data about the concentration of K-40 although in many cases the error is less than 1%. However, there are cases of considerably higher errors. It should be emphasized that even if the correction in K-40 concentration is large the correction of external dose index is negligible due to the higher weighing factor for Th-232 than for K-40 (by at least a factor of 10)