High resolutionL- andM-subshell internal conversion studies of low energy transitions in149Sm and151Eu

1970 ◽  
Vol 237 (4) ◽  
pp. 285-291 ◽  
Author(s):  
S. Antman ◽  
H. Pettersson ◽  
Z. Zehlev ◽  
I. Adam
1974 ◽  
Vol 24 (2) ◽  
pp. 161-170 ◽  
Author(s):  
A. Špalek ◽  
O. Dragoun

1972 ◽  
Vol 50 (13) ◽  
pp. 1511-1517 ◽  
Author(s):  
W. B. Cook ◽  
M. W. Johns ◽  
J. S. Geiger ◽  
R. L. Graham

Internal conversion measurement studies of the 14.6 min 101Mo β decay have led to the discovery of the following low-energy transitions in 101Tc: 6.281 ± 0.007 (75.4 ± 9%), 9.317 ± 0.010 (97 ± 1%), and 15.606 ± 0.015 keV (1.9 + 0.3%). From relative L-subshell intensities, the 6.281 and 9.317 keV transitions are found to be M1 with E2 admixtures of 0.010 ± 0.005% and 0.021 + 0.006% respectively; the weak 15.606 keV transition is E2 in character. These transitions establish excited states in 101Tc at 9.317 ± 0.010 and 15.601 ± 0.009 keV. The measured multipolarities together with decay scheme considerations lead to Jπ values of 9/2 +, 7/2 +, and 5/2 + for the ground state, the 9.317, and the 15.601 keV states respectively. Since these transitions were not observed in earlier studies of the β decay of 101Mo, quoted decay energies have been 15.6 keV too low. The measured K-conversion coefficient of the 80.926 keV transition shows that it is M1 with an E2 component of < 9%.


1968 ◽  
Vol 23 (7) ◽  
pp. 962-967
Author(s):  
E. Bashandy ◽  
N. Ibrahiem ◽  
G. El-Sayad

The internal conversion electron spectrum of transitions in the decay of (139 min) 165Dy to 165Ho has been studied using a high resolution iron-free double focusing β-ray spectrometer. In addition to γ rays previously reported eight new γ rays, mostly in the low energy region, have been observed. A decay scheme involving 17 excited levels is proposed for 165Ho. Multipolarity data, obtained from the measurements of absolute or ratios of conversion coefficients of γ rays, were utilized for assigning possible spins and parities to the levels of 165Ho. The experimental level structure is discussed in the light of nuclear models.


1997 ◽  
Vol 233 (2-3) ◽  
pp. 179-186
Author(s):  
J. Mayer ◽  
J.A. Janik ◽  
J. Krawczyka ◽  
K. Otnes ◽  
O. Steinsvoll ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document