| |
Record |
Links |
|
Author  |
n_TOF Collaboration (Perez-Maroto, P. et al); Lerendegui-Marco, J.; Domingo-Pardo, C.; Babiano-Suarez, V.; Balibrea-Correa, J.; Ladarescu, I. |
|
| |
Title |
New measurement of 50Cr and 53Cr (n,γ) cross sections at n_TOF: a call for chromium nuclear data revision |
Type |
Journal Article |
| |
Year |
2026 |
Publication |
European Physical Journal A |
Abbreviated Journal |
Eur. Phys. J. A |
|
| |
Volume |
62 |
Issue |
1 |
Pages |
5 - 19pp |
|
| |
Keywords |
|
|
| |
Abstract |
Cr-50 and Cr-53 are very relevant in criticality safety benchmarks related to nuclear reactors. The discrepancies of up to 30% between the neutron capture cross section evaluations have an important effect on the k(eff) and k(infinity) in criticality benchmarks particularly sensitive to chromium. In this work, the Cr-50,Cr-53(n,gamma) cross sections are to be determined between 1 and 100 keV with an 8-10% accuracy following the requirements of the NEA High Priority Request List (HPRL) to solve the current discrepancies. We have measured these reactions by the time-of-flight technique at the EAR1 experimental area of the n_TOF facility, using an array of four C6D6 detectors with very low neutron sensitivity. The highly-enriched samples used are significantly thinner than in previous measurements, thus minimizing the multiple-scattering effects. We have produced, and analysed with the R-matrix analysis code SAMMY, capture yields featuring 33 resonances of Cr-50 and 51 of Cr-53 with an accuracy between 5% and 9%, hence fulfilling the requirements made by the NEA. The differential and integral cross sections have been compared to previous data and evaluations. The new measured Cr-50,Cr-53(n,gamma) cross sections provide a valuable input for upcoming evaluations, which are deemed necessary given that the results presented herein do not support the increase in both cross sections proposed in the recent INDEN evaluation. |
|
| |
Address |
[Perez-Maroto, P.; Guerrero, C.; Fernandez, B.; Quesada, J. M.; Cortes-Giraldo, M. A.; Pavon, J. A.] Univ Seville, Seville, Spain, Email: cguerrero4@us.es |
|
| |
Corporate Author |
|
Thesis |
|
|
| |
Publisher |
Springer |
Place of Publication |
|
Editor |
|
|
| |
Language |
English |
Summary Language |
|
Original Title |
|
|
| |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
| |
Series Volume |
|
Series Issue |
|
Edition |
|
|
| |
ISSN |
1434-6001 |
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
WOS:001659695700001 |
Approved |
no |
|
| |
Is ISI |
yes |
International Collaboration |
yes |
|
| |
Call Number |
IFIC @ pastor @ |
Serial |
7026 |
|
| Permanent link to this record |
