D. R. Zolnowski

Identification ofTb145andTb144and levels in theN=81nucleus,Gd145

With the use of a helium gas-jet transport system the isotopes /sup 145/Tb and /sup 144/Tb were identified in a series of /sup 10/B+/sup 144/Sm irradiations. Nuclidic assignments were based on yields as a function of bombarding energy, ..gamma..-ray coincidences with gadolinium K x rays and comparisons with data from in-beam ..gamma..-ray studies. Thirteen transitions were observed to follow the decay of /sup 145/Tb (T/sub 1/2/ = 30 +- 3 sec). None of them were placed in a scheme incorporating six excited levels in /sup 145/Gd, th lowest two of which, 27.3 and 748.7 keV, were previously known from decay /sup 145/Gd/sup m/ decay. The nuclide /sup 144/Tb (T/sub 1/2/ = 5 +- 1 sec) was identified by observing the 742.9-keV ..gamma.. ray known from in-beam studies to be the 2/sup +/ (first-excited state)..-->..0/sup +/ (ground state) transition in /sup 144/Gd.

Identification of Tb-145 and Tb-144 and levels in the N=81 nucleus, Gd-145

With the use of a helium gas-jet transport system the isotopes /sup 145/Tb and /sup 144/Tb were identified in a series of /sup 10/B+/sup 144/Sm irradiations. Nuclidic assignments were based on yields as a function of bombarding energy, ..gamma..-ray coincidences with gadolinium K x rays and comparisons with data from in-beam ..gamma..-ray studies. Thirteen transitions were observed to follow the decay of /sup 145/Tb (T/sub 1/2/ = 30 +- 3 sec). None of them were placed in a scheme incorporating six excited levels in /sup 145/Gd, th lowest two of which, 27.3 and 748.7 keV, were previously known from decay /sup 145/Gd/sup m/ decay. The nuclide /sup 144/Tb (T/sub 1/2/ = 5 +- 1 sec) was identified by observing the 742.9-keV ..gamma.. ray known from in-beam studies to be the 2/sup +/ (first-excited state)..-->..0/sup +/ (ground state) transition in /sup 144/Gd.

Identification of /sup 145/Tb and /sup 144/Tb and levels in the N = 81 nucleus, /sup 145/Gd

With the use of a helium gas-jet transport system the isotopes /sup 145/Tb and /sup 144/Tb were identified in a series of /sup 10/B+/sup 144/Sm irradiations. Nuclidic assignments were based on yields as a function of bombarding energy, ..gamma..-ray coincidences with gadolinium K x rays and comparisons with data from in-beam ..gamma..-ray studies. Thirteen transitions were observed to follow the decay of /sup 145/Tb (T/sub 1/2/ = 30 +- 3 sec). None of them were placed in a scheme incorporating six excited levels in /sup 145/Gd, th lowest two of which, 27.3 and 748.7 keV, were previously known from decay /sup 145/Gd/sup m/ decay. The nuclide /sup 144/Tb (T/sub 1/2/ = 5 +- 1 sec) was identified by observing the 742.9-keV ..gamma.. ray known from in-beam studies to be the 2/sup +/ (first-excited state)..-->..0/sup +/ (ground state) transition in /sup 144/Gd.