Measurement of the 70Ge(n, γ) cross section up to 300 keV at the CERN n_TOF facility

Znanstveni rad - Izvorni znanstveni rad

• Autor: A. Gawlik
• Autor: ...
• Autor: Damir Bosnar; MBZ: 134936
• Autor: ...
• Autor: Petar Žugec; MBZ: 326085
• Kolaboracija: n_TOF Collaboration
• Autorova ustanova: Sveučilište u Zagrebu; Prirodoslovno-matematički fakultet; (Fizički odsjek)
• Znanstveno / umjetničko područje, polje i grana: PRIRODNE ZNANOSTI; Fizika

Sažetak (engleski)

Neutron capture data on intermediate mass nuclei are of key importance to nucleosynthesis in the weak component of the slow neutron capture processes, which occurs in massive stars. The (n, γ) cross section on 70Ge, which is mainly produced in the s process, was measured at the neutron time-of-flight facility n_TOF at CERN. Resonance capture kernels were determined up to 40 keV neutron energy and average cross sections up to 300 keV. Stellar cross sections were calculated from kT = 5 keV to kT = 100 keV and are in very good agreement with a previous measurement by Walter and Beer (1985) and recent evaluations. Average cross sections are in agreement with Walter and Beer (1985) over most of the neutron energy range covered, while they are systematically smaller for neutron energies above 150 keV. We have calculated isotopic abundances produced in s-process environments in a 25 solar mass star for two initial metallicities (below solar and close to solar). While the low metallicity model reproduces best the solar system germanium isotopic abundances, the close to solar model shows a good global match to solar system abundances in the range of mass numbers A = 60–80.

• Ključne riječi (engleski): 70Ge; neutron capture cross section; n_TOF
• Jezik: engleski
• Vrsta publikacije: Znanstveni rad - Izvorni znanstveni rad
• Status objave: Objavljen
• Vrsta recenzije: Recenziran - međunarodna recenzija
• Verzija publikacije: Objavljena verzija rada (izdavačev PDF)
• Naslov časopisa: Physical Review C
• Brojčani podaci: vol. 100, br. 4, 045804
• p-ISSN: 2469-9985
• e-ISSN: 2469-9993
• DOI: https://doi.org/10.1103/PhysRevC.100.045804
• URN:NBN: urn:nbn:hr:217:858285
• Datum objave publikacije: 2019
• Projekt: Šifra: IP-2018-01-8570; Naziv (hrvatski): Elektroni, kaoni i neutroni u preciznim mjerenjima svojstava hadrona i jezgara; Kratica: EKNpEXP; Voditelj: Damir Bosnar; Pravna nadležnost: Hrvatska; Financijer: HRZZ; Linija financiranja: IP
• URL dokumenta: https://link.aps.org/doi/10.1103/PhysRevC.100.045804
• Vrsta resursa: Tekst
• Prava pristupa: Otvoreni pristup
• Javna napomena: Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Received 1 April 2019; published 17 October 2019.
• Datum i vrijeme pohrane: 2020-08-21 16:22:13