Level structures of 131,129Ce observed in beta decay

Gizon, A.; Genevey, J.; Bucurescu, D.; Cǎta-Danil, G.; Gizon, J.; Inchaouh, J.; Barnéoud, D.; Egidy, T. von; Liang, C. F.; Nyakó, B. M.; Paris, P.; Penev, I.; Płochocki, A.; Ruchowska, E.; Ur, C. A.; Weiss, B.; Zolnai, L.

doi:10.1016/0375-9474(96)00178-9

Cited by 26 publications

(8 citation statements)

References 26 publications

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“…Only the level K π = 7/2 − has a pure configuration 7/2 − [523] and is determined at an energy position above the excited state I π = 9/2 − . The level K π = 7/2 − has never been observed experimentally for 133 Nd but the existence of a similar one has recently been confirmed in the neighboring isotone 131 Ce [2]. Furthermore, in Fig.…”

Section: Resultsmentioning

confidence: 70%

“…Most of these have given important information about the characterization of both collective and intrinsic excitations for odd-A nucleus (see for example [1][2][3]). For transitional nuclei it is well known that the level scheme is more complicated than that of spherical or deformed nuclear shape.…”

Section: Introductionmentioning

confidence: 99%

“…Another model which is useful in the study of odd nuclei is the Interacting Boson Fermion Model (IBFM) [10]. By assuming γ-softness a good result was obtained in the transitional region, particularly for 125,127 Xe [11], 127,129,131 Ce [2] and 133 Nd [9].…”

Section: Introductionmentioning

confidence: 99%

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Contribution of quasiparticle-phonon, recoil and coriolis interactions in describing low-lying states of 133Nd isotope

Boulal

Inchaouh

Jammari

2000

EPJ A

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A quasiparticle-phonon coupling based on one quadrupole phonon is developed. The coupling is constructed by using a deformed average field of Nilsson, a monopole pairing interaction and a quadrupolequadrupole force. Microscopic structure of the quadrupole phonon is given from the Tamm-Dancoff Approximation. The two effects of recoil and Coriolis forces are included with the assumption of a symmetric rotational motion. Since theoretical treatment is performed for an odd-A nuclei the configuration of intrinsic states should contain both one-quasiparticle and quasiparticle-phonon components. This method is applied to describe the level scheme of 133 Nd for which an agreement with experimental data is obtained. The results are also found similar to previous calculations obtained by the Particle plus Triaxial Rotor Model. PACS. 21.10.Hw Spin, parity, and isobaric spin -21.10.Re Collective levels -21.30.Fe Forces in hadronic systems and effective interactions -27.60.+j 90 ≤ A ≤ 149

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Section: Resultsmentioning

confidence: 70%

Section: Introductionmentioning

confidence: 99%

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Contribution of quasiparticle-phonon, recoil and coriolis interactions in describing low-lying states of 133Nd isotope

Boulal

Inchaouh

Jammari

2000

EPJ A

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“…This is expected as the 7/2 − isomeric state (T 1/2 =62 ns) in the isotope 129 Ce decays to the 5/2 + ground state. As only one half-life has been observed in 129 Ce, the β-decays of the 5/2 + ground state and 1/2 + excited state are not separated [14]. This explains why some spin values are undetermined.…”

Section: Experimental Techniques and Resultsmentioning

confidence: 87%

Decay of 129Ce to low-lying positive-parity states in 129La

Gizon

Genevey

Weiss

et al. 1997

Z Phys A - Particles and Fields

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Low-lying levels of the 129 La isotope have been investigated through the β + /EC decay of 129 Ce. The radioactive nuclei were produced in the 94 Mo+ 40 Ca reaction at a bombarding energy of 255 MeV and transported with a He-jet system. On-line mass separation was used to select the 129 Ce beta-decay. γ-γ-t, X-γ-t, e − -γ-t coincidence measurements as well as time multi-analysis were performed. Internal conversion electrons were recorded with a magnetic selector and multipolarities deduced. The level scheme of 129 La is discussed and compared with the calculations made in the frame of the neutron-proton Interacting Boson-Fermion Model (IBFM-2).

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“…The standard boson g factor values g π = 1 µ N and g ν = 0 µ N are used for all isotopes. We have estimated the single particle g l and g s , and taken them as g [20,45,46]. Using this procedure we have calculated the electromagnetic transitions, and a very good agreement between calculated and experimental magnetic moment of the ground states is obtained in both magnitude and sign as shown in Tables X and XI. The resulting branching ratios for the 151,153 Ho and 151,153 Dy nuclei are listed in Tables VI-IX, respectively, in comparison with the experimental data [40].…”

Section: Electromagnetic Transitionsmentioning

confidence: 99%

Negative-parity states and β decays in odd Ho and Dy nuclei withA=151,153

2008

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We have investigated the negative-parity states and electromagnetic transitions in 151,153 Ho and 151,153 Dy within the framework of the interacting boson fermion model 2 (IBFM-2). Spin assignments for some states with uncertain spin are made based on this calculation. Calculated excitation energies, electromagnetic transitions and branching ratios are compared with available experimental data and a good agreement is obtained. The model wave functions have been used to study β-decays from Ho to Dy isotones, and the calculated log f t values are close to the experimental data.

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Level structures of 131,129Ce observed in beta decay

Cited by 26 publications

References 26 publications

Contribution of quasiparticle-phonon, recoil and coriolis interactions in describing low-lying states of 133Nd isotope

Contribution of quasiparticle-phonon, recoil and coriolis interactions in describing low-lying states of 133Nd isotope

Decay of 129Ce to low-lying positive-parity states in 129La

Negative-parity states and β decays in odd Ho and Dy nuclei withA=151,153

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