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tion factor K$_{S}$ of sample pd-3 is slightly higher than for samples pd-1 and pd-2 due to the varying thickness. The thinner sample pd-3 absorbs less X-rays and thus more coincident summing with decay γ -rays can occur. 

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The number of activated nuclei N$_{act}$ can be written as 

where Φ$_{tot}$ = ∫ φ ( t ) dt is the time-integrated neutron flux and N$_{i}$ the number of atoms of species i in the sample. As our measurements are carried out relative to $^{197}$Au as a standard, the neutron flux Φ$_{tot}$ cancels out in the ratio, 

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The correction factor 

for the decay of activated nuclei during the irradia- tion time t$_{a}$ is calculated from the neutron flux history recorded with the $^{6}$Li glass detector downstream of the neutron target. This correction includes also the effect of variations in the neutron flux. 

The cross section 〈 σ$_{exp}$ 〉 is given in brackets to indi- cate that it represents an average over the quasi-stellar spectrum of the $^{7}$Li(p,n)$^{7}$Be source. The reference value for the experimental averaged $^{197}$Au cross section was adopted as 〈 σ$_{exp}$ 〉 =586 ± 8 mbarn [21]. 

In the activations of $^{120}$Te, $^{130}$Ba, and $^{132}$Ba, neutron capture populates ground and isomeric states in the prod- uct nucleus. The partial cross section to $^{131}$Bam could not be measured in this work because the isomer is too short short-lived ( t$_{1}$$_{/}$$_{2}$ = 14 . 6 min). Therefore, only the total capture cross section of $^{130}$Ba was derived from the ground state activity after an appropriate waiting time. Similarly, the isomeric state in $^{133}$Ba decays with 99.99% probability by internal transitions with a half-life of 38.9 h so that the total cross section can later be de- rived from the ground-state activity ( t$_{1}$$_{/}$$_{2}$ = 10 . 52 yr). In this case, the isomer lived long enough that the partial cross section could be determined as well. 

In cases where the half-lives of ground state and isomer are of the same order of magnitude, as for $^{121}$Te, where 

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## B. Partial cross sections 

