Measurement of the 154Gd(n,γ) cross section and its astrophysical implications

n-TOF Collaboration; Mirco Dietz; Ruchi Garg; C. Lederer-Woods; P. J.  Woods

doi:10.1016/j.physletb.2020.135405

Measurement of the 154Gd(n,γ) cross section and its astrophysical implications

n-TOF Collaboration, Mirco Dietz, Ruchi Garg, C. Lederer-Woods, P. J. Woods

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

The neutron capture cross section of 154Gd was measured from 1 eV to 300 keV in the experimental area located 185 m from the CERN n_TOF neutron spallation source, using a metallic sample of gadolinium, enriched to 67% in 154Gd. The capture measurement, performed with four C6D6 scintillation detectors, has been complemented by a transmission measurement performed at the GELINA time-of-flight facility (JRC-Geel), thus minimising the uncertainty related to sample composition. An accurate Maxwellian averaged capture cross section (MACS) was deduced over the temperature range of interest for s process nucleosynthesis modelling. We report a value of 880(50) mb for the MACS at keV, significantly lower compared to values available in literature. The new adopted 154Gd(n,γ) cross section reduces the discrepancy between observed and calculated solar s-only isotopic abundances predicted by s-process nucleosynthesis models.

Original language	English
Article number	135405
Journal	Physics Letters B
Early online date	3 Apr 2020
DOIs	https://doi.org/10.1016/j.physletb.2020.135405
Publication status	Published - 10 May 2020

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nucl-ex

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2002.02322Accepted author manuscript, 337 KBLicence: Creative Commons: Attribution (CC-BY)

https://arxiv.org/abs/2002.02322Licence: Creative Commons: Attribution (CC-BY)

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@article{e778901be2484374a9de613effa620bf,

title = "Measurement of the 154Gd(n,γ) cross section and its astrophysical implications",

abstract = "The neutron capture cross section of 154Gd was measured from 1 eV to 300 keV in the experimental area located 185 m from the CERN n_TOF neutron spallation source, using a metallic sample of gadolinium, enriched to 67% in 154Gd. The capture measurement, performed with four C6D6 scintillation detectors, has been complemented by a transmission measurement performed at the GELINA time-of-flight facility (JRC-Geel), thus minimising the uncertainty related to sample composition. An accurate Maxwellian averaged capture cross section (MACS) was deduced over the temperature range of interest for s process nucleosynthesis modelling. We report a value of 880(50) mb for the MACS at keV, significantly lower compared to values available in literature. The new adopted 154Gd(n,γ) cross section reduces the discrepancy between observed and calculated solar s-only isotopic abundances predicted by s-process nucleosynthesis models.",

keywords = "nucl-ex",

author = "{n-TOF Collaboration} and A. Mazzone and S. Cristallo and C. Massimi and Collaboration, {the n_TOF} and Mirco Dietz and Ruchi Garg and C. Lederer-Woods and Woods, {P. J.}",

year = "2020",

month = may,

day = "10",

doi = "10.1016/j.physletb.2020.135405",

language = "English",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier",

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TY - JOUR

T1 - Measurement of the 154Gd(n,γ) cross section and its astrophysical implications

AU - n-TOF Collaboration

AU - Mazzone, A.

AU - Cristallo, S.

AU - Massimi, C.

AU - Collaboration, the n_TOF

AU - Dietz, Mirco

AU - Garg, Ruchi

AU - Lederer-Woods, C.

AU - Woods, P. J.

PY - 2020/5/10

Y1 - 2020/5/10

N2 - The neutron capture cross section of 154Gd was measured from 1 eV to 300 keV in the experimental area located 185 m from the CERN n_TOF neutron spallation source, using a metallic sample of gadolinium, enriched to 67% in 154Gd. The capture measurement, performed with four C6D6 scintillation detectors, has been complemented by a transmission measurement performed at the GELINA time-of-flight facility (JRC-Geel), thus minimising the uncertainty related to sample composition. An accurate Maxwellian averaged capture cross section (MACS) was deduced over the temperature range of interest for s process nucleosynthesis modelling. We report a value of 880(50) mb for the MACS at keV, significantly lower compared to values available in literature. The new adopted 154Gd(n,γ) cross section reduces the discrepancy between observed and calculated solar s-only isotopic abundances predicted by s-process nucleosynthesis models.

AB - The neutron capture cross section of 154Gd was measured from 1 eV to 300 keV in the experimental area located 185 m from the CERN n_TOF neutron spallation source, using a metallic sample of gadolinium, enriched to 67% in 154Gd. The capture measurement, performed with four C6D6 scintillation detectors, has been complemented by a transmission measurement performed at the GELINA time-of-flight facility (JRC-Geel), thus minimising the uncertainty related to sample composition. An accurate Maxwellian averaged capture cross section (MACS) was deduced over the temperature range of interest for s process nucleosynthesis modelling. We report a value of 880(50) mb for the MACS at keV, significantly lower compared to values available in literature. The new adopted 154Gd(n,γ) cross section reduces the discrepancy between observed and calculated solar s-only isotopic abundances predicted by s-process nucleosynthesis models.

KW - nucl-ex

U2 - 10.1016/j.physletb.2020.135405

DO - 10.1016/j.physletb.2020.135405

M3 - Article

SN - 0370-2693

JO - Physics Letters B

JF - Physics Letters B

M1 - 135405

ER -

Measurement of the 154Gd(n,γ) cross section and its astrophysical implications

Abstract

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