Gamma- and Conversion-EiectronData from Slow Neutron Capture in $^{74}$Se, $^{75}$Se, $^{76}$Se and $^{77}$Se and from $^{75}$Se{E.C.) $^{75}$$As

摘要

In this report we give complete sets of $gamma$-lines seen in the reactions $^{74}$Se(n,$gamma$) and $^{76}$se(n,$gamma$), and the $gamma$-lines observed in the $^{75}$Se(n,$gamma$) and $^{77}$Se(n,$gamma$) reactions and from the $^{75}$Se(E.C.) $^{75}$As decay. These data has also in part given in ref./1/. Further for strong low-energy transitions in the $^{74}$Se(n,$gamma$) and $^{76}$se(n,$gamma$) reactions, the conversion electron data are shown. They are identical to those in ref. /1/. The measurements were carried out at the ILL/Grenoble and at the IKP/KFA Jülich. The high energy $gamma$-lines were measured with pair spectrometers both at Jülich and Grenoble. The low-energy $gamma$-lines were recorded with the high resolution curved crystal spectrometers GAMS 1 and GAMS 2/3 at the ILL/Grenoble. The conversion electrons were measured with the high resolution $eta$-spectrometer BILL at the ILL/Grenoble. The following spectra were obtained and summarized in this report ; [...]