The decay of 124Cs

Abstract

The decay of 124Cs has been investigated at the ISOLDE facility and a level scheme of 124Xe is proposed. In addition to the previously known levels of the ground state and the quasi-gamma bands, the 0+ and 2+ states of the quasi-beta band have been observed at 1 268.7 and 1 628.3 keV respectively

124Ba Decay to the 55 124 Cs69 low-spin levels

“…Intensity deduced after subtraction of the one related to the 12~Cs~ z~Xe decay, in agreement with Ref 12. …”

“…The low-energy part of the gamma-ray spectrum, presented in Fig. Therefore, in such a situation, it appears necessary to do a comparison between our results and the precise ones obtained at CERN by Charvet and coworkers [12] with A = 124 mass-separated cesium samples and to subtract the 124Cs ~ 12exe decay contributions. In Table 1, the intensifies have been normalized with the 354 keV (2+--+0 +) 124Xe line.…”

Dipole responses in γ−soft 124–134Xe in the spectroscopic energy region

“…Indeed, only one excitation for every isotope has been ascribed 1 + mixed-symmetry (MS), while another excitation has been attributed to electric dipole (E1) two-phonon excitation. Moreover, the results of this experiment reveal differences from previous experiments [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. From a theoretical aspect, limited studies have been proposed to describe the nature of the low-lying dipole response in Xe isotopes [8].…”

“…Next, we compared our predicted results with the experimental ones and tried to determine the parity and multipolarity of the observed excitations. In this context, two experimental setups were used for observing low-lying dipole excitations for xenon isotopes, namely NRF and the γ-spectroscopic method [8,[21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. First of all, we would like to stress that for the γspectroscopic experiments, only the energies of the observed excitation states are presented, because in these experiments, the multipolarities of the excitations cannot be fully determined.…”

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

“…Then at the DUBNA U-300 heavy-ion cyclotron, Droste and coworkers have observed a (34+_6) s half-life produced in the 115In(lZC, 3n)lZ4Cs reaction at 60 MeV [17]. In a more recent measurement also performed at CERN on pure isotopically separated samples of ~24Cs produced in lanthanum targets bombarded with 600 MeV protons, only one half-life of 31 s has been found [20]. The authors have underlined that no other ~24Cs activity with half-life greater than 5 s has been observed.…”