The decay of128Cs to levels in128Xe

New isomers and their decay in odd-odd neutron-deficient cesium isotopes

“…The l~SIn(160, 5n), 12aSb(llB, 6n) reactions at the YALE accelerator laboratory or the 133Cs (p, 8n) reaction induced with 100 MeV protons at the McGill synchrocyclotron have been used as production modes in these experiments. For the second one, m8Cs, a precise half-life measurement of (3.62+_0.02) rain has been made by Droste et al [22] on the Swierk linear accelerator with the 128Xe(p, n)lZaCs reaction at 10 MeV. This determination is in agreement with the value reported by Ekstr6m et al [16] and observed on isotopically separated samples at ISOLDE.…”

Study of the124Xe and126Xe structure

“…The experimental set-up was the same as described in our previous work [1]. The gaseous target contained nearly 3 % of la4Xe and 3 % of 126Xe (30 times more than in natural xenon).…”

“…The gaseous target contained nearly 3 % of la4Xe and 3 % of 126Xe (30 times more than in natural xenon). The background was mainly due to 128Cs decay [1]. The exposure and counting times were carefully chosen so as to reduce contamination with 128Cs.…”

“…Measurements encompassed single gamma spectra and, in the case of 126Xe, coincidence gamma-gamma spectra. The same measuring system as previously described [1] was used. In Figure I the gamma spectrum of a caesium source obtained for a sample investigated in time intervals chosen for 124Cs is presented by way of example.…”

“…The present study of the decay of ~24Cs and 126Cs is a part of our investigation of the level schemes of even-mass xenon isotopes in the neutron-deficient region [1][2][3]. Levels in 126Xe can be populated from the decay of 126I or from the decay of 126Cs.…”