{"title":"Neutron-capture gamma-ray spectra from even-even excited nuclei with rotational levels","authors":"L.V. Groshev, A.M. Demidov, V.N. Lutsenko, V.I. Pelekhov","doi":"10.1016/0891-3919(59)90139-0","DOIUrl":null,"url":null,"abstract":"<div><p>Thermal-neutron capture γ-ray spectra from Gd, Er, Hf, Dy and Ta have been measured over the range 0·3–9 MeV by use of a magnetic Compton-electron spectrometer. With the first three of these elements, the excited nuclei are <sub>64</sub><sup>156</sup>Gd<sub>94</sub>, <sub>68</sub><sup>168</sup>Gd<sub>94</sub>, <sub>68</sub><sup>168</sup>Er<sub>100</sub> and <sub>72</sub><sup>178</sup>Hf<sub>106</sub>, which have rotational levels near the ground state; in their spectra a closely spaced group of intense lines is found near 1 MeV that is absent from the spectra of even-odd (e.g. <sub>66</sub><sup>165</sup>Dy<sub>99</sub>) and odd-odd (e.g. <sub>73</sub><sup>182</sup>Ta<sub>109</sub>) emitters. The properties of these lines are. related to those of the low-lying levels.</p></div>","PeriodicalId":100812,"journal":{"name":"Journal of Nuclear Energy (1954)","volume":"9 1","pages":"Pages 50-68"},"PeriodicalIF":0.0000,"publicationDate":"1959-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0891-3919(59)90139-0","citationCount":"8","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Nuclear Energy (1954)","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0891391959901390","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 8
Abstract
Thermal-neutron capture γ-ray spectra from Gd, Er, Hf, Dy and Ta have been measured over the range 0·3–9 MeV by use of a magnetic Compton-electron spectrometer. With the first three of these elements, the excited nuclei are 64156Gd94, 68168Gd94, 68168Er100 and 72178Hf106, which have rotational levels near the ground state; in their spectra a closely spaced group of intense lines is found near 1 MeV that is absent from the spectra of even-odd (e.g. 66165Dy99) and odd-odd (e.g. 73182Ta109) emitters. The properties of these lines are. related to those of the low-lying levels.
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