J.W. Starner

Ge(Li)-Ge(Li) coincidence studies of the decay of 109Pd

Abstract The energy levels of 109 Ag that are populated in the decay of 13 h 109 Pd have been investigated with high-resolution Ge(Li) gamma-ray spectrometers. Coincidence results obtained with a Ge(Li)Ge(Li) detector system coupled with energy sums and relative intensity considerations suggest the existence of excited states in 109 Ag at 88, 133, 311, 415, 702, 724, 735, 863, 869, 911, 912 and 1099 keV. An additional state is present at either 707 or 795 keV. A comparison with previous Coulomb excitation data has been made. Spin and parity assignments are suggested for most of the states, and the level structure is discussed in terms of existing nuclear models.

The decay of 111Pd and 111mPd

Abstract The energy levels of 111 Ag have been investigated through study of the decay of 22 min 111 Pd and 5.5 h 111m Pd using high-resolution Ge(Li) and Si(Li) spectrometers and a 30 cm 3 Ge(Li), 45 cm 3 Ge(Li) coincidence system. More than 150 gamma transitions have been observed from the two isomers. The coincidence results, in conjunction with energy sums and relative-intensity considerations, suggest a 111 Ag level scheme involving 48 energy levels below 2.2 MeV. On the basis of beta and gamma selection rules, unique spin-parity assignments are suggested for a number of the established levels. The 74 sec first excited state in 111 Ag has been shown to independently beta decay to several excited states in 111 Cd. It is noted that there are many similarities in the level structures of 111 Ag, 109 Ag and 107 Ag. These nuclei seem reasonably well described by the particle-photon coupling model; however, it also appears possible that certain groups of levels are rotational in character.

Energy Levels of Ru 100

The nuclear-level structure of

ENERGY LEVELS OF

^{100}\mathrm{Ru}

sup 100

has been investigated through study of the radioactive decay of 16-sec

Ru.

^{100}\mathrm{Tc}

Decay of 245Am

and 20-h

Superallowed 26Alm(β+ + EC)26Mg decay

^{100}\mathrm{Rh}

The decay scheme of 139Ba

. The experimental techniques employed include two-parameter Ge(Li)-Ge(Li) coincidence spectroscopy and NaI(Tl)

Search for isomerism in 193Os

\ensuremath{\gamma}\ensuremath{-}\ensuremath{\gamma}