Neutron activation of Ga-69 and Ga-71 at k(B)T approximate to 25 keV

Kathrin Goebel; Clemens Beinrucker; Benjamin Bruckner; Philipp Erbacher; Stefan Fiebiger; Micaela Fonseca; Michael Heftrich; Tanja Heftrich; Franz Kaeppeler; Antonin Krasa; Deniz Kurtulgil; Claudia Lederer-Woods; Ralf Plag; Arjan Plompen; Rene Reifarth; Stefan Schmidt; Kerstin Sonnabend; Mario Weigand

doi:10.1103/PhysRevC.103.025802

Neutron activation of Ga-69 and Ga-71 at k(B)T approximate to 25 keV

Kathrin Goebel, Clemens Beinrucker, Benjamin Bruckner, Philipp Erbacher, Stefan Fiebiger, Micaela Fonseca, Michael Heftrich, Tanja Heftrich, Franz Kaeppeler, Antonin Krasa, Deniz Kurtulgil, Claudia Lederer-Woods, Ralf Plag, Arjan Plompen, Rene Reifarth, Stefan Schmidt, Kerstin Sonnabend, Mario Weigand

School of Physics and Astronomy

Research output: Contribution to journal › Article › 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 = 25 keV at the Joint Research Centre (JRC), Geel, Belgium. Protons were provided by an electrostatic
Van de Graaff accelerator to produce neutrons via the reaction 7
Li(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
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevC.103.025802
Publication status	Published - 12 Feb 2021

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Goebel, K., Beinrucker, C., Bruckner, B., Erbacher, P., Fiebiger, S., Fonseca, M., Heftrich, M., Heftrich, T., Kaeppeler, F., Krasa, A., Kurtulgil, D., Lederer-Woods, C., Plag, R., Plompen, A., Reifarth, R., Schmidt, S., Sonnabend, K., & Weigand, M. (2021). Neutron activation of Ga-69 and Ga-71 at k(B)T approximate to 25 keV. Physical Review C, 103(2), 1-7. Article 025802. https://doi.org/10.1103/PhysRevC.103.025802

@article{2d715948778746cc8b80bc747377f195,

title = "Neutron activation of Ga-69 and Ga-71 at k(B)T approximate to 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 = 25 keV at the Joint Research Centre (JRC), Geel, Belgium. Protons were provided by an electrostaticVan 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.",

author = "Kathrin Goebel and Clemens Beinrucker and Benjamin Bruckner and Philipp Erbacher and Stefan Fiebiger and Micaela Fonseca and Michael Heftrich and Tanja Heftrich and Franz Kaeppeler and Antonin Krasa and Deniz Kurtulgil and Claudia Lederer-Woods and Ralf Plag and Arjan Plompen and Rene Reifarth and Stefan Schmidt and Kerstin Sonnabend and Mario Weigand",

year = "2021",

month = feb,

day = "12",

doi = "10.1103/PhysRevC.103.025802",

language = "English",

volume = "103",

pages = "1--7",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "2",

}

Goebel, K, Beinrucker, C, Bruckner, B, Erbacher, P, Fiebiger, S, Fonseca, M, Heftrich, M, Heftrich, T, Kaeppeler, F, Krasa, A, Kurtulgil, D, Lederer-Woods, C, Plag, R, Plompen, A, Reifarth, R, Schmidt, S, Sonnabend, K & Weigand, M 2021, 'Neutron activation of Ga-69 and Ga-71 at k(B)T approximate to 25 keV', Physical Review C, vol. 103, no. 2, 025802, pp. 1-7. https://doi.org/10.1103/PhysRevC.103.025802

TY - JOUR

T1 - Neutron activation of Ga-69 and Ga-71 at k(B)T approximate to 25 keV

AU - Goebel, Kathrin

AU - Beinrucker, Clemens

AU - Bruckner, Benjamin

AU - Erbacher, Philipp

AU - Fiebiger, Stefan

AU - Fonseca, Micaela

AU - Heftrich, Michael

AU - Heftrich, Tanja

AU - Kaeppeler, Franz

AU - Krasa, Antonin

AU - Kurtulgil, Deniz

AU - Lederer-Woods, Claudia

AU - Plag, Ralf

AU - Plompen, Arjan

AU - Reifarth, Rene

AU - Schmidt, Stefan

AU - Sonnabend, Kerstin

AU - Weigand, Mario

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 = 25 keV at the Joint Research Centre (JRC), Geel, Belgium. Protons were provided by an electrostaticVan 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 = 25 keV at the Joint Research Centre (JRC), Geel, Belgium. Protons were provided by an electrostaticVan 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.

U2 - 10.1103/PhysRevC.103.025802

DO - 10.1103/PhysRevC.103.025802

M3 - Article

SN - 2469-9985

VL - 103

SP - 1

EP - 7

JO - Physical Review C

JF - Physical Review C

IS - 2

M1 - 025802

ER -

Neutron activation of Ga-69 and Ga-71 at k(B)T approximate to 25 keV

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