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SUMMARY:High precision 209Bi(n\,ɣ) cross section measurement at n_TOF EAR
 2.
DTSTART;VALUE=DATE-TIME:20241119T144500Z
DTEND;VALUE=DATE-TIME:20241119T150000Z
DTSTAMP;VALUE=DATE-TIME:20260423T021559Z
UID:indico-contribution-25490@indico.ific.uv.es
DESCRIPTION:Speakers: Gabriel de la Fuente Rosales (Instituto de Física C
 orpuscular (IFIC))\nThe development of innovative future nuclear reactors 
 and the enhancement of operational safety rely heavily on the precision of
  nuclear data\, particularly in minimizing the uncertainties associated wi
 th microscopic neutron-induced cross sections. MYRRHA is an experimental A
 ccelerator Driven System that uses a lead-bismuth mixture as a coolant sys
 tem. The radiological burden associated with the use of this type of coola
 nt for fast nuclear systems is mainly due to the production of 210Po from 
 209Bi(n\,γ) reactions. There are significant discrepancies in the existin
 g evaluations of 209Bi(n\,γ) reactions\, particularly concerning the feed
 ing into the metastable state. Therefore\, accurate prediction of the 210P
 o inventory in lead-bismuth cooled nuclear systems requires precise knowle
 dge of both reaction channels and their branching ratios.\n\nFrom an astro
 physical perspective\, this reaction also plays a crucial role in the s-pr
 ocess and for U/Th cosmic clocks.\n\nThe most recent 209Bi(n\,γ) Time-of-
 Flight (ToF) measurement was performed at the CERN n_TOF EAR1 facility by 
 C. Domingo and colleagues in 2006\, using the state-of-the-art low neutron
  sensitivity C6D6 detectors. However\, the target accuracy could not be re
 ached due to a significant in-beam γ-ray background and insufficient lumi
 nosity of EAR1. This limitation has been significantly improved with the r
 enewed high luminosity EAR2. Recently\, in combination with the high sensi
 tivity sTED array detection setup\, EAR2 has demonstrated its potential fo
 r challenging (n\,γ) such as 94Nb and 79Se cross section measurements in 
 a broad neutron energy range. \n\nThe current 209Bi(n\,γ) experiment at n
 _TOF EAR2 aims to achieve an accuracy of 5-10% in the Resolved Resonance R
 egion\, covering neutron energies from thermal levels up to 35 keV\, and a
 n accuracy of less than 15% in the neutron energy range from 35 to 100 keV
 . At the time of the conference\, a comprehensive overview of the ongoing 
 experiment at the CERN n_TOF facility will be presented\, along with the i
 nitial experimental results from the current measurement campaign.\n\nhttp
 s://indico.ific.uv.es/event/7664/contributions/25490/
LOCATION:
URL:https://indico.ific.uv.es/event/7664/contributions/25490/
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