Deformation of Sr and Rb isotopes close to the N=Z line via β-decay studies using the total absorption technique
A study of the Gamow-Teller strength distributions B(GT) in the beta decay of 78 Sr and 76,78 Rb has been made using a total absorption spectrometer (TAS). Following the success in deducing the sign of the deformation for 76 Sr, a similar approach is adopted for 78 Sr based on a comparison of the measured B(GT) with quasiparticle random-phase approximation calculations. This work confirms its previously expected prolate deformation in the ground state. Conclusions about the structure of the odd-odd 76,78 Rb isotopes have been drawn based on their measured B(GT) distributions.
Due to their robustness and simple system configurations the Transmitted Reference (TR) modulation scheme and autocorrelation receiver are preferred candidates for the implementation of cheap Ultra WideBand (UWB) Impulse Radio (IR) systems. Unfortunately, the results of simulations and field tests performed on built UWB IR TR systems have shown a relatively poor noise performance. This noise performance results in such a bad receiver sensitivity that prevents the application of TR modulation and autocorrelation receivers in real applications. This contribution shows that the noise performance of UWB IR TR autocorrelation receiver can be improved considerably by reducing the energy capture time of the receiver. By matching the receiver parameters to that of the transmitted UWB pulse, an almost 8-dB improvement in receiver sensitivity has been achieved.