Beta-decay of148,150,152Pr into levels of148,150,152Nd

Karlewski, T.; Hildebrand, N.; Brügger, M.; Kaffrell, Ν.; Trautmann, Ν.; Herrmann, G.

doi:10.1007/bf01287264

Cited by 7 publications

(6 citation statements)

References 27 publications

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“…[6][7][8]10,11] [9]. The excitation energy of the band head energy at or above the paring energy gap indicates that this assignment is possible [9].…”

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confidence: 99%

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High-spin states and a new band based on the isomeric state in 152Nd

et al. 2010

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Abstract. High-spin states of the neutron-rich152 Nd nucleus have been reinvestigated by measuring the prompt γ-rays in the spontaneous fission of 252 Cf. The ground-state band and a side negative-parity band have been updated. A new band based on the 2243.7 keV isomeric state has been identified. The half-life for the isomeric state has been measured to be 63(7) ns. The projected shell model is employed to study the band structure of this nucleus. The results show that the calculated levels of the bands are in good agreement with the experimental ones, and the isomeric state and the negative-parity band are based on the proton π5/ The neutron-rich nuclei around the A ∼ 150 region show transitional character from spherical to prolate quadrupole deformation and from octupole vibrational excitations to static octupole deformation [1][2][3][4][5].152 Nd is located in the deformed region and has a well-deformed shape. Previously, the level structure of 152 Nd has been studied by using various experimental methods [6][7][8][9][10][11][12]. The ground-state band and a negative-parity band based on a 2 − state have been identified. In addition, the identification of the K isomeric states and the bands built on the isomers is a very important topic in this region. In a recent publication, two-quasiparticle (2-qp) isomeric states and bands based on the isomers have been reported in 154,156 Nd and 156,158,160 Sm [13]. For 152 Nd, an isomeric state was also reported in ref.[11], but no band structure based on that isomer was observed. In order to understand the systematic structural characteristics and to search for the isomeric band, we reinvestigated the high-spin states of 152 Nd. Here we report our new result. To study high-spin states of 152 Nd, the γ-rays in the spontaneous fission of 252 Cf were measured. These γ-rays include prompt γ-rays emitted after their formation in spontaneous fission and delayed γ-rays from β-decay. The a

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“…[6][7][8]10,11] [9]. The excitation energy of the band head energy at or above the paring energy gap indicates that this assignment is possible [9].…”

mentioning

confidence: 99%

“…Previously, the level structure of 152 Nd has been studied by using various experimental methods [6][7][8][9][10][11][12]. The ground-state band and a negative-parity band based on a 2 − state have been identified.…”

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confidence: 99%

High-spin states and a new band based on the isomeric state in 152Nd

et al. 2010

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“…This is reasonable because levels in 152 Pr populated in the beta-decay of the even-even 152 Ce nucleus cannot have spins larger than three when the ground sate spin of 152 Pr is either 3 or 4 [7][8][9][10]. The levels observed in the spontaneous fission of 252 Cf have usually high spins.…”

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confidence: 93%

“…Previously, fourteen low-lying excited levels in 152 Pr were identified in the beta-decay of 152 Ce [6] where an isomer at 114.8(2) keV was found with a half-life of 4.1(1) µs. The configurations of the ground state of 152 Pr were discussed in the reports of the beta-decay of 152 Pr to 152 Nd [7][8][9][10] with different assignments. However, no high-spin level has been observed in 152 Pr before the present work.…”

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confidence: 99%

First identification of high-spin states in the odd-odd neutron-rich nucleus152Pr

et al. 2011

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“…From y-ray spectra of mass separated fission products produced by KUR-ISOL , the Pr-K X-rays and two y-rays are assigned to be generated by the B- [2] showed that this y-transition belongs to the B-decay of 152pr. The search for 152Ce has been carried out again in the present report.…”

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confidence: 99%