A Study of the120Sn(p, n?)120Sb reaction

Abstract

Levels of 12~ have been observed using the ~2~ ny) reaction at proton energies between 3.90 and 6.25 MeV. Sixteen previously unobserved levels below 1.03 MeV were populated. The resulting level scheme is compared with that obtained using the 121Sb (p, d)

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

“…A more constructive comparison will be possible with similar states already observed in 12o, 122, 1241 [9,32] and 120,122Sb [33][34][35][36]. Heavy ion in beam spectroscopy measurements would be useful to excite selectively collective band structures involving high-spin components and to help in the comparison with theoretical calculations.…”

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

“…cannot be supported by the same combinations of proton and neutron configurations; nevertheless, for 124,126,128Cs nuclei, the situation appears as remarkably stable and both dipole and quadrupole moments as well as spin and parity assignments 1 +, can be well accounted for by the following combination of configurations 1 + {re [420] 1/2, v [411] 1/2}. In the 120qh 51~u case, measurements performed independently by Adachi et al[22] and Emigh et al[23] support a 1 + assignment for ground-state. The 1221 nucleus can be considered as having a 1 + 53 ~ ground-state from log ft and /?-feedings in both 122I --* 122Te and 122Xe --+ 122I decays[20] but among the odd-odd iodine nuclei all the other isotopes 126,124, t20,1181 present 2-ground-states[21].…”

“…The situation is not so clear for the N= 69 isotones. For example, in the 12~ (p, nT) reaction[23] two thirds of the ~-intensity reach the 8.4 keV excited level and such a situation forbids a clean comparison with a neighbour having a relatively well separated 1 + ground-state as 124Cs. In the 120qh 51~u case, measurements performed independently by Adachi et al[22] and Emigh et al[23] support a 1 + assignment for ground-state.…”