Neutron activation of 69Ga and 71Ga at kBT ≈ 25 keV

Kathrin  Göbel; Clemens  Beinrucker; Benjamin Brückner; Philipp  Erbacher; Stefan  Fiebiger; Micaela  Fonseca; Michael  Heftrich; Tanja  Heftrich; Franz  Käppeler; Antonin Krása; Deniz Kurtulgil; Claudia  Lederer-Woods; Ralf  Plag; Arjan J.M. Plompen; René  Reifarth; Stefan  Schmidt; Kerstin Sonnabend; Mario  Weigand

doi:10.1103/PhysRevC.103.025802

Neutron activation of 69Ga and 71Ga at kBT ≈ 25 keV

Kathrin Göbel, Clemens Beinrucker, Benjamin Brückner, Philipp Erbacher, Stefan Fiebiger, Micaela Fonseca, Michael Heftrich, Tanja Heftrich, Franz Käppeler, Antonin Krása, Deniz Kurtulgil, Claudia Lederer-Woods, Ralf Plag, Arjan J.M. Plompen, René Reifarth, Stefan Schmidt, Kerstin Sonnabend, Mario Weigand

Nuclear Systems Measurements

Research output › peer-review

Abstract

Background: About 50% of heavy elements are produced by the slow neutron capture process (s process) in stars. The element gallium is mostly produced during the weak s process in massive stars.
Purpose: Our activation at kBT≈25 keV is the first experiment in a series of activation and time-of-flight measurements on 69Ga and 71Ga relevant for astrophysics.
Methods: We activated 69Ga and 71Ga with a neutron distribution that corresponds to a quasistellar distribution with kBT=25keV at the Joint Research Centre (JRC), Geel, Belgium. Protons were provided by an electrostatic Van de Graaff accelerator to produce neutrons via the reaction 7Li(p,n). The produced activity was measured via the γ emission by the decaying product nuclei by high-purity germanium detectors.
Results: We provide spectrum-averaged cross sections (SACS) and ratios of the cross sections σGa/σAu for the neutron spectrum of the activation. We obtain values of σ69Ga,SACS=(186±12)mb and σ71Ga,SACS=(112±7)mb, and cross-section ratios of σ69Ga/σAu=0.29±0.02 and σ71Ga/σAu=0.17±0.01.
Conclusions: Our data disagree with the available evaluated data provided by KADoNiS v0.3, our cross-section ratio is about 20% higher for 69Ga and about 20% lower for 71Ga.

Original language	English
Article number	025802
Pages (from-to)	1-7
Number of pages	7
Journal	Physical Review C
Volume	103
DOIs	https://doi.org/10.1103/PhysRevC.103.025802
State	Published - 12 Feb 2021

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Göbel, K., Beinrucker, C., Brückner, B., Erbacher, P., Fiebiger, S., Fonseca, M., Heftrich, M., Heftrich, T., Käppeler, F., Krása, A., Kurtulgil, D., Lederer-Woods, C., Plag, R., Plompen, A. J. M., Reifarth, R., Schmidt, S., Sonnabend, K., & Weigand, M. (2021). Neutron activation of 69Ga and 71Ga at kBT ≈ 25 keV. Physical Review C, 103, 1-7. Article 025802. https://doi.org/10.1103/PhysRevC.103.025802

@article{ecbb88a2246b40a38ffcb888df13d4fa,

title = "Neutron activation of 69Ga and 71Ga at kBT ≈ 25 keV",

abstract = "Background: About 50% of heavy elements are produced by the slow neutron capture process (s process) in stars. The element gallium is mostly produced during the weak s process in massive stars.Purpose: Our activation at kBT≈25 keV is the first experiment in a series of activation and time-of-flight measurements on 69Ga and 71Ga relevant for astrophysics.Methods: We activated 69Ga and 71Ga with a neutron distribution that corresponds to a quasistellar distribution with kBT=25keV at the Joint Research Centre (JRC), Geel, Belgium. Protons were provided by an electrostatic Van de Graaff accelerator to produce neutrons via the reaction 7Li(p,n). The produced activity was measured via the γ emission by the decaying product nuclei by high-purity germanium detectors.Results: We provide spectrum-averaged cross sections (SACS) and ratios of the cross sections σGa/σAu for the neutron spectrum of the activation. We obtain values of σ69Ga,SACS=(186±12)mb and σ71Ga,SACS=(112±7)mb, and cross-section ratios of σ69Ga/σAu=0.29±0.02 and σ71Ga/σAu=0.17±0.01.Conclusions: Our data disagree with the available evaluated data provided by KADoNiS v0.3, our cross-section ratio is about 20% higher for 69Ga and about 20% lower for 71Ga.",

keywords = "Neutron activation, Direct reactions, Nuclear data analysis, Nuclear physics",

author = "Kathrin G{\"o}bel and Clemens Beinrucker and Benjamin Br{\"u}ckner and Philipp Erbacher and Stefan Fiebiger and Micaela Fonseca and Michael Heftrich and Tanja Heftrich and Franz K{\"a}ppeler and Antonin Kr{\'a}sa and Deniz Kurtulgil and Claudia Lederer-Woods and Ralf Plag and Plompen, {Arjan J.M.} and Ren{\'e} Reifarth and Stefan Schmidt and Kerstin Sonnabend and Mario Weigand",

note = "Score=10",

year = "2021",

month = feb,

day = "12",

doi = "10.1103/PhysRevC.103.025802",

language = "English",

volume = "103",

pages = "1--7",

journal = "Physical Review C",

issn = "0556-2813",

publisher = "APS - American Physical Society",

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Göbel, K, Beinrucker, C, Brückner, B, Erbacher, P, Fiebiger, S, Fonseca, M, Heftrich, M, Heftrich, T, Käppeler, F, Krása, A, Kurtulgil, D, Lederer-Woods, C, Plag, R, Plompen, AJM, Reifarth, R, Schmidt, S, Sonnabend, K & Weigand, M 2021, 'Neutron activation of 69Ga and 71Ga at kBT ≈ 25 keV', Physical Review C, vol. 103, 025802, pp. 1-7. https://doi.org/10.1103/PhysRevC.103.025802

TY - JOUR

T1 - Neutron activation of 69Ga and 71Ga at kBT ≈ 25 keV

AU - Göbel, Kathrin

AU - Beinrucker, Clemens

AU - Brückner, Benjamin

AU - Erbacher, Philipp

AU - Fiebiger, Stefan

AU - Fonseca, Micaela

AU - Heftrich, Michael

AU - Heftrich, Tanja

AU - Käppeler, Franz

AU - Krása, Antonin

AU - Kurtulgil, Deniz

AU - Lederer-Woods, Claudia

AU - Plag, Ralf

AU - Plompen, Arjan J.M.

AU - Reifarth, René

AU - Schmidt, Stefan

AU - Sonnabend, Kerstin

AU - Weigand, Mario

N1 - Score=10

PY - 2021/2/12

Y1 - 2021/2/12

N2 - Background: About 50% of heavy elements are produced by the slow neutron capture process (s process) in stars. The element gallium is mostly produced during the weak s process in massive stars.Purpose: Our activation at kBT≈25 keV is the first experiment in a series of activation and time-of-flight measurements on 69Ga and 71Ga relevant for astrophysics.Methods: We activated 69Ga and 71Ga with a neutron distribution that corresponds to a quasistellar distribution with kBT=25keV at the Joint Research Centre (JRC), Geel, Belgium. Protons were provided by an electrostatic Van de Graaff accelerator to produce neutrons via the reaction 7Li(p,n). The produced activity was measured via the γ emission by the decaying product nuclei by high-purity germanium detectors.Results: We provide spectrum-averaged cross sections (SACS) and ratios of the cross sections σGa/σAu for the neutron spectrum of the activation. We obtain values of σ69Ga,SACS=(186±12)mb and σ71Ga,SACS=(112±7)mb, and cross-section ratios of σ69Ga/σAu=0.29±0.02 and σ71Ga/σAu=0.17±0.01.Conclusions: Our data disagree with the available evaluated data provided by KADoNiS v0.3, our cross-section ratio is about 20% higher for 69Ga and about 20% lower for 71Ga.

AB - Background: About 50% of heavy elements are produced by the slow neutron capture process (s process) in stars. The element gallium is mostly produced during the weak s process in massive stars.Purpose: Our activation at kBT≈25 keV is the first experiment in a series of activation and time-of-flight measurements on 69Ga and 71Ga relevant for astrophysics.Methods: We activated 69Ga and 71Ga with a neutron distribution that corresponds to a quasistellar distribution with kBT=25keV at the Joint Research Centre (JRC), Geel, Belgium. Protons were provided by an electrostatic Van de Graaff accelerator to produce neutrons via the reaction 7Li(p,n). The produced activity was measured via the γ emission by the decaying product nuclei by high-purity germanium detectors.Results: We provide spectrum-averaged cross sections (SACS) and ratios of the cross sections σGa/σAu for the neutron spectrum of the activation. We obtain values of σ69Ga,SACS=(186±12)mb and σ71Ga,SACS=(112±7)mb, and cross-section ratios of σ69Ga/σAu=0.29±0.02 and σ71Ga/σAu=0.17±0.01.Conclusions: Our data disagree with the available evaluated data provided by KADoNiS v0.3, our cross-section ratio is about 20% higher for 69Ga and about 20% lower for 71Ga.

KW - Neutron activation

KW - Direct reactions

KW - Nuclear data analysis

KW - Nuclear physics

UR - https://ecm.sckcen.be/OTCS/llisapi.dll/overview/48431790

U2 - 10.1103/PhysRevC.103.025802

DO - 10.1103/PhysRevC.103.025802

M3 - Article

SN - 0556-2813

VL - 103

SP - 1

EP - 7

JO - Physical Review C

JF - Physical Review C

M1 - 025802

ER -