ИССЛЕДОвАНИЕ РАСПАДА128Ba→128Cs→128Xe

Nuclear structure studies utilizing LAMPF. Annual progress report. [Summaries of research activities at Idaho National Engineering Laboratory]

“…The intensities of the electron-capture branches were determined from the intensity balances of the transitions populating and depopulating each(of the 13l~s levels. The multipolarities were taken from Horen et al 4) and were used to determine the conversion coefficient~ -where no definitive multi polarity assignments were reported by them, we used their relative electron intensities and our relative y-ray intensities to determine the conversion coefficients. The sum of the relative electr6~ intensities of the K + L 1 + L2 + L3 shells (2) associated with the 123-keV y ray were normalized to a 95% E2 + 5% Ml multipolarity.…”

“…The Pr(OH) 3 was washed with H 2 0 and converted to• the nitrate by thrice heating to near dryness with concentrated HN0 3 . The Pr salts were dissolved in a 10 ~ HN0 3 -0.l ~ NaBr0 3 solution and the oxidized ce+ 4 was extracted into 0.3 M di-2-ethylhex~ylphosphoric acid (HDEHP) in heptane. Cerium was further purified by twice washing the HDEHP with 10M HN0 3 -0.l M NaBr0 3 , back extracting with 6 M HN0 3 containing sever~l arops of 30% H 2 0 2 and scrubbing the strTp solution with heptane.…”

“…• and the 13 4 Ce (73 h)~ 1 3 4 La (6.67 min)~ 1 3 4 Ba decay chains; 1 3 1 Ba (11.7 d); and 1 5 1 Tb (17.6 h). As discussed in our previous progress report (ANCR-1200), these nuclides lie in the region 50< Z, N < 82, where the structure and properties of.the collective potential-energy surface are of current interest and near N = 88, where a transition between "fpherical" and strongly-deformed equilibrium shapes occurs.…”

“…. The 134ce-to-1 34 La enh:mcement, relative to the equilibrium source condi~ion~ ~s ~ 41 in this spectrum.…”