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Gamma-spectroscopy of the 199At nucleus with the Recoil Filter Detector (1998)

Męczyński, W. ; Bednarczyk, P. ; Chapman, R. ; [et al.]

Springer

The European physical journal 3 (1998), S. 311-312

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ISSN: 1434-601X

Keywords: PACS:23.20.Lv Gamma transitions and level energies – 27.80.+w 190 ≤ A ≤ 219 – 29.40.Ym Other detectors

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract. The neutron deficient 199At nucleus has been studied in the 175Lu+28Si reaction at Eb= 141 MeV. In order to select events of interest in the presence of the very strong background caused by fission, γ-rays have been detected in coincidence with recoiling evaporation residues. The excited states of 199At observed for the first time may indicate that this nucleus is deformed.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/s100500050184

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Investigation of prolate-oblate shape-coexistence in 74Kr (1999)

Becker, F. ; Korten, W. ; Hannachi, F. ; [et al.]

Springer

The European physical journal 4 (1999), S. 103-105

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ISSN: 1434-601X

Keywords: PACS:21.10.Tg Lifetimes – 23.20.Lv Gamma transitions and level energies – 23.20.Nx Internal conversion and extranuclear effects – 25.70.Gh Compound nucleus – 27.50.+e 59 A 89

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract: The atomic nucleus 74Kr has been investigated using combined conversion-electron (CE) and γ-ray spectroscopy. In order to confirm the existence of the expected low-lying isomeric 0+ 2 state, the possibility of an electric-monopole (E0) decay to the ground state was examined. The observation of an E0 transition at 508 keV allowed the determination of the mixing between coexisting prolate and oblate shapes.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/s100500050209

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Configuration assignments and decay of 126La high-spin bands (2000)

Timár, J. ; Gizon, A. ; Paris, P. ; [et al.]

Springer

The European physical journal 7 (2000), S. 7-10

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ISSN: 1434-601X

Keywords: PACS: 21.10.Re Collective levels – 23.20.Lv Gamma transitions and level energies – 21.60.Ev Collective models – 27.60.+j 90 ≤ A ≤ 149

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract: High spin states of 126La have been populated using the reaction 116Sn+14N at 68 MeV. γ-rays and conversion electrons were detected with the GAREL array. Multipolarities of the lowest-lying in-band dipole transitions have been determined from the deduced internal conversion coefficients. Experimental B(M1)/B(E2) ratios have been derived for the bands and compared with calculated values using the Dönau-Frauendorf geometrical model. Configurations are proposed for the bands comparing them with cranked shell model calculations and on the basis of the measured B(M1)/B(E2) ratios. The β-decay of 126La has also been revisited. The population of the 126Ba levels gives a probable spin value of five for the decaying high-spin 126La state with T 1/2≈ 64 s which may indicate a signature inversion in the πh11/2νh11/2 band.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/s100500050002

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Coexisting oblate and strongly triaxial structures in 191Pt (2005)

Kutsarova, T. ; Schück, C. ; Gueorguieva, E. ; [et al.]

Springer

The European physical journal 23 (2005), S. 69-78

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ISSN: 1434-601X

Keywords: 29.30.Kv X- and γ-ray spectroscopy ; 23.20.Lv γ transitions and level energies ; 21.60.Ev Collective models ; 27.80.+w 190 ⩽ A ⩽ 219

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract. Excited states in 191Pt have been populated using the reaction 186W + 11B at 85MeV beam energy. Gamma-ray coincidences were measured using the EUROGAM-II spectrometer array. The level scheme has been extended considerably. Evidence for favoured structures of highly triaxial shape with γ ∼ -90° coexisting with oblate structures has been obtained by comparison with total Routhian surface and cranked shell model calculations. The presence of proton excitations in both positive- and negative-parity states has been confirmed.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1140/epja/i2004-10065-1

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