Pregled bibliografske jedinice broj: 1264358
New detection systems for an enhanced sensitivity in key stellar (n,γ) measurements
New detection systems for an enhanced sensitivity in key stellar (n,γ) measurements // EPJ Web of Conferences 279 / Freeman, S. ; Lederer-Woods, C. ; Manna, A. ; Mengoni, A. (ur.).
Ženeva, Švicarska, 2023. 13001, 7 doi:10.1051/epjconf/202327913001 (predavanje, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)
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Naslov
New detection systems for an enhanced sensitivity in key stellar (n,γ) measurements
Autori
Lerendegui-Marco, J. ; ... ; Bosnar, Damir ; ... ; Žugec, Petar
Kolaboracija
N_TOF Collaboration
Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni
Izvornik
EPJ Web of Conferences 279
/ Freeman, S. ; Lederer-Woods, C. ; Manna, A. ; Mengoni, A. - , 2023
Skup
Nuclear Physics in Astrophysics – X (NPA-X 2022)
Mjesto i datum
Ženeva, Švicarska, 05.09.2022. - 09.09.2022
Vrsta sudjelovanja
Predavanje
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
neutron capture, n_TOF, neutron time of flight
Sažetak
Neutron capture cross-section measurements are fundamental in the study of astrophysical phenomena, such as the slow neutron capture (s-) process of nucleosynthesis operating in red-giant and massive stars. However, neutron capture measurements via the time-of-flight (TOF) technique on key s-process nuclei are often challenging. Difficulties arise from the limited mass (∼mg) available and the high sample-related background in the case of the unstable s-process branching points. Measurements on neutron magic nuclei, that act as s-process bottlenecks, are affected by low (n, γ) cross sections and a dominant neutron scattering background. Overcoming these experimental challenges requires the combination of facilities with high instantaneous flux, such as n_TOFEAR2, with detection systems with an enhanced detection sensitivity and high counting rate capabilities. This contribution reviews some of the latest detector developments in detection systems for (n, γ) measurements at n_TOF, such as i-TED, an innovative detection system which exploits the Compton imaging technique to reduce the dominant neutron scattering background and s-TED, a highly segmented total energy detector intended for high flux facilities. The discussion will be illustrated with results of the first measurement of key the s-process branching-point reaction 79Se(n, γ).
Izvorni jezik
Engleski
Znanstvena područja
Fizika
POVEZANOST RADA
Ustanove:
Prirodoslovno-matematički fakultet, Zagreb
