21-29 July 2022
US/Pacific timezone

A new measurement on $^{56}$Fe(n,inl) using GAINS at GELINA

27 Jul 2022, 06:48
Folsom ()



Alexandru Negret


The extended dataset of 56Fe(n,ng) cross sections measured by our group more than a decade ago at GELINA [1] was used in many recent evaluations like ENDF, JEFF and CIELO. Despite the special measures we took to ensure reliability and accuracy, concerns were raised by various groups with regard to several features of our dataset (absolute normalization an/or shape) and therefore the 56Fe(n,inl) cross section is still under the evaluation by the International Nuclear Data Evaluation Network (INDEN) [2]. Consequently a new experiment is now under preparation aiming to take advantage of the numerous experimental improvements of the GAINS setup implemented over the years. While gamma spectroscopy combined with the time-of-flight method will remain the main techniques involved, several other experimental details will differ substantially:
- A new enriched target is already available,
- The number of HPGe detectors of GAINS increased from 4 to 12,
- The ToF flight path decreased from 200 m to 100 m,
- A new digitized data acquisition for GAINS is being implemented.
We will present all these aspects with the purpose of updating the community about our experimental plans while triggering the debate over any additional experimental features that could be considered.

[1] A. Negret, C. Borcea, Ph. Dessagne, M. Kerveno, A. Olacel, A.J.M. Plompen, and M. Stanoiu, Physical Review C90, 034602 (2014)
[2] https://www-nds.iaea.org/INDEN/

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