Measurement of the 54,57Fe(n,γ) Cross Section in the Resolved Resonance Region at CERN n_TOF

Giubrone, G.; Domingo‐Pardo, C.; Taín, J. L.; Lederer, C.; Altstadt, S.; Andrzejewski, J.; Audouin, L.; Barbagallo, M.; Bécares, V.; Bečvář, F.; Belloni, F.; Berthoumieux, E.; Billowes, J.; Boccone, V.; Bosnar, D.; Brügger, M.; Calviani, M.; Calviño, F.; Cano‐Ott, D.; Carrapiço, C.; Cerutti, F.; Chiaveri, E.; Chin, M.; Colonna, N.; Cortés, G.; Cortés-Giraldo, M.A.; Diakaki, Μ.; Durán, I.; Dressler, R.; Dzysiuk, N.; Eleftheriadis, C.; Ferrari, A.; Fraval, K.; Ganesan, S.; García, A. R.; Gómez-Hornillos, M.B.; Gonçalves, I. F.; González‐Romero, E.; Griesmayer, E.; Guerrero, C.; Gunsing, F.; Gurusamy, P.; Jenkins, D. G.; Jericha, E.; Kadi, Y.; Käppeler, F.; Karadimos, D.; Kivel, N.; Koehler, P.; Kokkoris, M.; Korschinek, G.; Krtička, M.; Kroll, J.; Langer, C.; Leeb, H.; Leong, L.S.; Losito, R.; Manousos, A.; Massimi, C.; Marganiec, J.; Martínez, T.; Mastinu, P.; Mastromarco, M.; Meaze, M.; Mendoza, E.; Mengoni, A.; Milazzo, Paolo; Mingrone, F.; Mirea, M.; Mondelaers, W.; Paradela, C.; Pavlik, A.; Perkowski, J.; Pignatari, M.; Arjan, Plompen; Praena, J.; Quesada, J.; Rauscher, T.; Reifhart, R.; Riego, A.; Román, F.; Rubbia, C.; Sarmento, R.; Schillebeeckx, P.; Schmidt, S.; Schumann, D.; Tagliente, G.; Tarrío, D.; Tassan‐Got, L.; Tsinganis, A.; Valenta, S.; Vannini, G.; Variale, V.; Vaz, P.; Ventura, Alessandro; Versaci, R.; Vermeulen, M. J.; Vlachoudis, V.; Vlastou, R.; Wallner, A.; Ware, T.; Weigand, M.; Weiß, C.; Wright, T.; Žugec, P.

doi:10.1016/j.nds.2014.08.033

Cited by 11 publications

(8 citation statements)

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“…The comparison in Table IX shows that the present results are 34% higher at 25 keV and 20% lower at 481 keV than obtained by folding the evaluated cross section from the ENDF/B-VII.1 library with the respective neutron spectra. While the evaluated data imply a rather weak energy dependence, the present results are consistent with a 1/ √ E n dependence on energy, in full agreement with the crosssection shape implied by the experimental TOF data [23][24][25][26][27]. Therefore, this energy trend is to be preferred for improving the MACS values (see Sec.…”

Section: B Spectrum-averaged Cross Sections At Kev Energiessupporting

confidence: 89%

“…The comparison of the present MACS for kT = 30 keV in Fig. 7 shows good agreement with the refined TOF measurements performed at Geel [25] and at CERN/n_TOF [26,27], whereas the evaluated cross sections in the ENDF/B-VII.1 [28], JENDL-4.0 [29], and JEFF-3.2 [30] libraries are yielding incompatibly small values. The MACS in the KADoNiS [10] compilation is obviously biased by the high value from Refs.…”

Section: A Maxwellian-averaged Cross Sectionssupporting

confidence: 81%

“…7. Comparison of the present MACS value at kT = 30 keV with the recommended value in the compilation of Ref. [10], data obtained in previous TOF measurements [24][25][26][27] and calculated from the evaluated cross sections in the ENDF/B-VII.1 [28], JENDL-4.0 [29], and JEFF-3. 2 [30] libraries.…”

Section: B Spectrum-averaged Cross Sections At Kev Energiesmentioning

confidence: 79%

“…n_TOF (expt) [26,27] 28.5±1.6 GELINA (expt) [25] 27.6 ± 1.8 ORNL (expt) [23,24] 33.6 ± 2.7 KADoNiS (comp) [9] 29.6 ± 1.3 ENDF-B/VII.1 (eval) [28] 21.6 ± 2.7 JENDL-4.0 (eval) [29] 21.6 JEFF-3.2 (eval) [30] 21.6…”

Section: Data Frommentioning

confidence: 99%

“…Recently, Giubrone and the n_TOF collaboration [26,27] took advantage of the intense, high-resolution neutron source at CERN for further improving the capture data of 54 Fe from thermal to 500 keV. By reducing the sample dimensions again by factors of 3 and 25 in thickness and mass, respectively, and by application of refined analysis methods the set of resonance parameters could be obtained with unprecedented accuracy.…”

Section: Data Frommentioning

confidence: 99%

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Precise measurement of the thermal and stellar Fe54(n,γ)Fe55 cross sections via accel

et al. 2017

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Accelerator mass spectrometry (AMS) represents a complementary approach for precise measurements of neutron capture cross sections, e.g., for nuclear astrophysics. This technique, completely independent of previous experimental methods, was applied for the measurement of the 54 Fe(n,γ) 55 Fe reaction. Following a series of irradiations with neutrons from cold and thermal to keV energies, the produced long-lived 55 Fe nuclei (t 1/2 = 2.744 + −0.009) yr) were analyzed at the Vienna Environmental Research Accelerator. A reproducibility of about 1% could be achieved for the detection of 55 Fe, yielding cross-section uncertainties of less than 3%. Thus, this method produces new and precise data that can serve as anchor points for time-of-flight experiments. We report significantly improved neutron capture cross sections at thermal energy (σ th = 2.30 ± 0.07 b) as well as for a quasi-Maxwellian spectrum of kT = 25 keV (σ = 30.3 ± 1.2 mb) and for E n = 481 ± 53 keV (σ = 6.01 ± 0.23 mb). The new experimental cross sections have been used to deduce improved Maxwellianaveraged cross sections in the temperature regime of the common s-process scenarios. The astrophysical impact is discussed by using stellar models for low-mass asymptotic giant branch stars.

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Section: B Spectrum-averaged Cross Sections At Kev Energiessupporting

confidence: 89%