Experimental setup and procedure for the measurement of the Be-7(n,alpha)alpha reaction at n_TOF

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10331978" target="_blank" >RIV/00216208:11320/16:10331978 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.nima.2016.05.089" target="_blank" >http://dx.doi.org/10.1016/j.nima.2016.05.089</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.nima.2016.05.089" target="_blank" >10.1016/j.nima.2016.05.089</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Experimental setup and procedure for the measurement of the Be-7(n,alpha)alpha reaction at n_TOF

Popis výsledku v původním jazyce

The newly built second experimental area EAR2 of then n_ToF spallation neutron source at CERN allows to perform (n, charged particles) experiments on short-lived highly radioactive targets. This paper describes a detection apparatus and the experimental procedure for the determination of the cross-section of the Be-7(n,alpha)alpha reaction, which represents one of the focal points toward the solution of the cosmological Lithium abundance problem, and whose only measurement, at thermal energy, dates back to 1963. The apparently unsurmountable experimental difficulties stemming from the huge Be-7 gamma-activity, along with the lack of a suitable neutron beam facility, had so far prevented further measurements. The detection system is subject to considerable radiation damage, but is capable of disentangling the rare reaction signals from the very high background. This newly developed setup could likely be useful also to study other challenging reactions requiring the detectors to be installed directly in the neutron beam.

Název v anglickém jazyce

Experimental setup and procedure for the measurement of the Be-7(n,alpha)alpha reaction at n_TOF

Popis výsledku anglicky

The newly built second experimental area EAR2 of then n_ToF spallation neutron source at CERN allows to perform (n, charged particles) experiments on short-lived highly radioactive targets. This paper describes a detection apparatus and the experimental procedure for the determination of the cross-section of the Be-7(n,alpha)alpha reaction, which represents one of the focal points toward the solution of the cosmological Lithium abundance problem, and whose only measurement, at thermal energy, dates back to 1963. The apparently unsurmountable experimental difficulties stemming from the huge Be-7 gamma-activity, along with the lack of a suitable neutron beam facility, had so far prevented further measurements. The detection system is subject to considerable radiation damage, but is capable of disentangling the rare reaction signals from the very high background. This newly developed setup could likely be useful also to study other challenging reactions requiring the detectors to be installed directly in the neutron beam.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BG - Jaderná, atomová a molekulová fyzika, urychlovače

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

ISSN

0168-9002

e-ISSN

—

Svazek periodika

830

Číslo periodika v rámci svazku

September 2016

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

197-205

Kód UT WoS článku

000381530300027

EID výsledku v databázi Scopus

2-s2.0-84973149462