The level structure of 122Sb
1978; Elsevier BV; Volume: 297; Issue: 3 Linguagem: Inglês
10.1016/0375-9474(78)90151-3
ISSN1873-1554
AutoresV.L. Alexeev, B.A. Emelianov, A. I. Egorov, L.P. Kabina, D.M. Kaminker, Yu.L. Khazov, I.A. Kondurov, E.K. Leushkin, Yu. N. Loginov, В. В. Мартынов, V. L. Rumiantsev, S.L. Sakharov, P. A. Sushkov, H. G. Börner, W.F. Davidson, J.A. Pinston, K. Schreckenbach,
Tópico(s)Electron and X-Ray Spectroscopy Techniques
ResumoLow-energy gamma and conversion electron spectra following the 121Sb(n, γ)122Sb reaction in the energy range 50–500 keV and 16–500 keV respectively have been studied with bent crystal and magnetic spectrometers. Gamma-gamma coincidences in the energy range 60–550 keV have been investigated with a Ge(Li)-Ge(Li) arrangement. Proton spectra from the 13 and 15 MeV deuteron-induced (d, p) reaction have been reanalysed. The 122Sb level scheme involving 36 excited states in the range 0–920 keV has been constructed. Parity was determined for all the levels introduced. Unique spin values are assigned to 31 levels. It is shown that the present level scheme energies differ from those previously found in the 123Sb(d, t)122Sb reaction by a systematic shift of 41 keV. The (n, γ) levels are found to match up extremely well with the (d, p), (d, t) and (p, n) reactions. The correspondence between the (n, γ) and (nres, γ) data is reasonably good. A comparison of the (n, γ), (d, p) and (d, t) level schemes resulted in identifying 23 out of 26 levels belonging to the πg72vs12, πg72vd32, πg72vh112, πd52vs12, πd52vd320 and πd52vh112 two-quasipaiticle multiplets. Energy splittings of these p-n configurations by residual interactions taken as a combination of short range Wigner and singlet forces have been calculated. It is shown that in order to reproduce experimental branching ratios configuration mixing should be taken into account, though the amplitudes needed for the admixed configurations are rather small and do not exceed 0.3. Comparison of the 122Sb and 134Cs level schemes resulted in identification of the πd52vh112 and πg72vh112 multiplets in 134Cs. Energy splittings of both multiplets are calculated.
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