Erratum: Measurement of the Ge 70 (n,γ) cross section up to 300 keV at the CERN n_TOF facility (Physical Review C (2019) 100 (045804) DOI: 10.1103/PhysRevC.100.045804)

Abstract

An error was discovered in the neutron flux used to normalize the 70Ge(n, γ) data. The same error affects data in Ref. [1] and a separate correction will be published. Updated resonance kernels are printed in Tables I and II. Systematic uncertainties in the capture kernels are 3.2% below and 5.1% above 10 keV neutron energy. Analysis of the (updated) resonance parameters under the same assumptions as in Ref. [1] yield the average resonance parameters [Γγ = 200(12) meV with σGamma;γ = 62(8) and D0 = 1400(200) eV, where «Γγ»,σΓγ and D0 are expectation value of s-wave radiation width, standard deviation of the distribution of Γγ and s-wave resonance spacing, respectively. The difference in D0 does not come from use of correct flux. We found a bug in the code used for determination of D0 of 70Ge. The corrected unresolved cross section from 25-300 keV is shown in Fig. 1. The correction of the flux mainly affects the data at high neutron energy above 100 keV where now our data are in better agreement with the ENDF/B-VIII evaluation [3] and previous results from Walter and Beer [2]. Systematic uncertainties of the unresolved cross section are 6.7%. The Maxwellian averaged cross sections (MACS) are shown in Table III. Above the experimental limit of 300 keV, we used the ENDF/B-VIII cross section for our MACS calculations, assuming a 20% uncertainty. Changes in the MACS values remain below 6%, therefore, our astrophysical considerations remain largely unchanged. It should be noted that the agreement between our results and Kadonis-1.0 [4] is now excellent. We apologize for any inconvenience this caused. The corrected results will be provided to the EXFOR database. (Figure Presented).