Neutron resonance parameters of bromine-79 and bromine-81.
スポンサーリンク
概要
- 論文の詳細を見る
Neutron resonances of separated isotopes of bromine were measured using a TOF spec-trometer of the Japan Atomic Energy Research Institute electron linear accelerator. Trans-mission and capture measurements were made with a <SUP>6</SUP>Li-glass and a Moxon-Rae detector respectively, on separated isotopes (98%) of <SUP>79</SUP>Br and <SUP>81</SUP>Br. Resonance analyses were made on transmission data with an area analysis code, and on capture data with a Monte-Carlo program. For <SUP>79</SUP>Br gΓ<SUP>0</SUP><SUB>n</SUB> values of 156 levels below 10 keV are obtained, and for <SUP>81</SUP>Br 100 levels below 15 keV. The s-wave strength function S0, average level spacing <D>, and average radiation width <Γ<SUB>γ</SUB>> are obtained ; for <SUP>79</SUP>Br S<SUB>0</SUB>= (1.27 ± 0.14)10<SUP>-4</SUP>, <D>= 45 ± 5 eV, <Γ<SUB>γ</SUB>>=293 ± 20 meV, and for <SUP>81</SUP>Br S<SUB>0</SUB>= (0.86 ± 0.14) 10<SUP>-4</SUP>, <D> =70 ± 12 eV. <Γ<SUB>γ</SUB>> = 234 ± 20 meV. For <SUP>79</SUP>Br statistical properties of resonances are in good agreement with the predictions of the statistical model. Intermediate structures are observed in the resonances of <SUP>81</SUP>Br show-ing clusters of levels at 1.2, 4.4, 10.0, 11.5 and 14.1 keV, where the curve of cumulative sum of gΓ<SUP>0</SUP><SUB>n</SUB> vs. neutron energy shows steep rises.
- 一般社団法人 日本原子力学会の論文
著者
-
KAWARASAKI Yuuki
Japan Atomic Energy Research Institute
-
Mizumoto Motoharu
Japan Atomic Energy Agency
-
OHKUBO Makio
Japan Atomic Energy Research Institute
関連論文
- Measurements of keV-Neutron Capture Cross Sections and Capture Gamma-Ray Spectra of ^Se
- 3a-SD-1 Scattering of 18.5 MeV Neutroons from ^Ni
- Design of a Compact 4π Ge Spectrometer for the Measurement of Neutron Capture Cross Sections of Minor Actinides
- Research and Development Program on Accelerator Driven Subcritical System in JAEA
- Time-of-Flight Measurement of Photoneutrons from O^, Ca^, and P^
- Development of a High Intensity RFQ at JAERI
- Improvement of Gamma-ray Production Data for JENDL-3.2
- System Design of a Proton Linac for the Neutron Science Project at Japan Atomic Energy Research Institute
- Differential .ALPHA.-Protection Cross Sections of Iron and Nickel for 4.3 to 14.1 MeV Nertrons.
- Neutron resonance parameters of bromine-79 and bromine-81.
- Neutron resonance parameters of silver-107 and silver-109.