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Neutron capture yields and resonance parameters of dysprosium isotopes measured at Japan Proton Accelerator Research Complex

Title
Neutron capture yields and resonance parameters of dysprosium isotopes measured at Japan Proton Accelerator Research Complex
Authors
SHIN, SUNGGYUNYONG, UK KYENAMKUNG, WONCHO, MOO HYUN
POSTECH Authors
CHO, MOO HYUN
Date Issued
21-Dec-2018
Publisher
SPRINGER
Abstract
Neutron capture yields of dysprosium isotopes (161Dy, 162Dy, 163Dy, and 164Dy) were measured using the time-of-flight method with a NaI(Tl) spectrometer located at 27.9m from the spallation neutron target in the ANNRI beamline at the Materials and Life Science Experimental Facility of the Japan Proton Accelerator Research Complex. The resonance parameters were determined using the multilevel R-matrix Bayesian code SAMMY in the neutron energy range of 1 to 300 eV. Five resonances of the 161Dy isotope, reported by Shin et al. but not presented in ENDF/B-VII.1, were confirmed in this study. One resonance of the 164Dy isotope presented in ENDF/B-VII.1 was not observed in this study. The measured average level spacings were 2.31 ± 0.23 eV for 161Dy and 6.91 ± 0.69 eV for 163Dy. The statistical distributions of the resonance parameters reasonably agreed with the Porter-Tomas distributions and multiple exit channel theory.
.Neutron capture yields of dysprosium isotopes (Dy-161, Dy-162, Dy-163, and Dy-164) were measured using the time-of-flight method with a NaI(Tl) spectrometer locate at 27.9m from the spallation neutron target in the ANNRI beamline at the Materials and Life Science Experimental Facility of the Japan Proton Accelerator Research Complex. The resonance parameters were determined using the multilevel R-matrix Bayesian code SAMMY in the neutron energy range of 1 to 300eV. Five resonances of the Dy-161 isotope, reported by Shin et al. but not presented in ENDF/B-VII.1, were confirmed in this study. One resonance of the Dy-164 isotope presented in ENDF/B-VII.1 was not observed in this study. The measured average level spacings were 2.31 +/- 0.23 eV for Dy-161 and 6.91 +/- 0.69 eV for Dy-163. The statistical distributions of the resonance parameters reasonably agreed with the Porter-Tomas distributions and multiple exit channel theory.
Keywords
CROSS-SECTION MEASUREMENT; NUCLEAR-DATA; DY; SCIENCE
URI
http://oasis.postech.ac.kr/handle/2014.oak/94577
DOI
10.1140/epja/i2018-12653-8
ISSN
1434-6001
Article Type
Article
Citation
EUROPEAN PHYSICAL JOURNAL A, vol. 54, no. 12, 2018-12-21
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 CHO, MOO HYUN
Div. of Advanced Nuclear Enginrg
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