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Shell Effect and a-Decay ProbabilityFor the prediction of half-lives for e-decay a semiempirical equation is given. Taking into account a mean excitation energy of the daughter nuclei the constants in the equation for the e-half-lives were reevaluated using the latest published decay schemes. The ratios of experimental and calculated half-lives show a systematic behaviour if plotted versus the shell effects. Using this correlation the e-half-lives for unknown nuclides can be predicted with an improved accuracy.

Experimental cross sections for the reactions 66 Zn(d, n) 67 Ga, S2 Cr(d, 2n)" g Mn, and l86 W(d, 2n) 186 Re are reported. The values obtained are compared with the cross sections expected from the systematics. Zusammenfassung Es werden experimentelle Wirkungsquerschnitte für die Reaktionen 66 Zn(d, n) 67 Ga, 52 Cr(d, 2n)" g Mn und 186 W(d, 2n) 186 Re angegeben. Die erhaltenen Werte werden verglichen mit Wirkungsquerschnitten, die aufgrund einer Systematik abgeschätzt wurden. Risumi On^ourni des valeurs experimentales de sections efficaces pour les reactions b6 Zn(d, n) 67 Ga, 52 Cr(d, 2n) S2 Mnet 186 W(d, 2n) 186 Re. Les valeurs obtenues sont comparees aux sections efficaces estimees d'apres une systematique.

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A new generation of production-ready yaw rate sensor, based on silicon micromachining, is presented. The sensor is designed for mass production and high performance applications. A combination of surface and bulk micromachining leads to an advantage in design, signal evaluation and packaging. This paper discusses the design of the sensing element: two bulk micromachined oscillating masses each of which supports two surface micromachined accelerometers for detection of the Coriolis force. Mechanical balancing of the sensor is avoided by implementation of a new dry etching process and precise photolithography. The electrodynamic actuation and high Q-value of the oscillator allow packaging at atmospheric pressure. Characterization results of the device are presented.