ISSN:
1434-601X
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Zusammenfassung The nuclearg-factor of the 181 keV-level of Tc99 was determined by measuring the angular correlation of the 741 keV-181 keV gamma gamma cascade in an external magnetic field. The result,g=+1.44 ±0.13, yields a magnetic moment of 3.6 ±0.3 nuclear magnetons for the spin assignment 5/2. A study of the disintegration confirmed the known decay scheme but an additional gamma ray of 950 keV was found. Coincidence measurements proved that this γ-ray is a, transition to the 181 keV-level. A new determination of the half lifetime of the 181 keV-level confirmed the known value, but the limits of error were reduced to:T 1/2 = 3.57 ±0.05. 10−9. We measured the angular correlation function of the 741 keV-181 keV-cascade: W(Θ)= 1 + (0.118 ±0.011) · P2 (cos Θ)-(0.003 ±0.008) · P4(cosΘ) and of the 741 keV-41 kev-140keV triple cascade: W(Θ)= 1-(0.164 ±0.013) · P2(cosΘ) + (0.003 ±.007) · P4(cosΘ). The source was prepared as ammonium molybdate in liquid solution. Delayed coincidence measurements showed weak perturbations by internal fields. The results are discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01337609
