نتایج جستجو برای: beta ray
تعداد نتایج: 486509 فیلتر نتایج به سال:
The $\beta$-decay of neutron-rich $^{129}$In into $^{129}$Sn was studied using the GRIFFIN spectrometer at ISAC facility TRIUMF. study observed half-lives ground state and each $\beta$-decaying isomers. level scheme has been expanded with thirty-one new $\gamma$-ray transitions nine excited levels, leading to a re-evaluation $\beta$-branching ratios spin assignments. observation (29/2$^{+}$) 19...
The x-ray coordinates of beta-barrel transmembrane proteins from the porins superfamily and relatives are used to calculate the mean tilt of the beta-strands and their mean local twist and coiling angles. The 13 proteins examined correspond to beta-barrels with 8 to 22 strands, and shear numbers ranging from 8 to 24. The results are compared with predictions from the model of Murzin, Lesk, and ...
In the synthesis of hexamethylenetetranitramine (HMX) by Bachmann method, the morphology of crude HMX products are needle-like with alpha polymorph. This quality of materials leads to separation of α-HMX from final suspension to be time-consuming and difficult. On the other hands, crude product of α-HMX are the more sensitive and unsafe than β-HMX. Herein, a seeding strategy wa...
An intermediate image beta-ray spectrometer has been constructed utilizing the focusing properties of a Ushaped magnetic field distribution. The construction and performance of the instrument are discussed. A transmission of ten percent has been attained with a resolution of about six percent. A scintillation spectrometer is used in conjunction with the intermediate image spectrometer for the p...
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