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Spallation neutron spectrum on a massive lead/paraffin target irradiated with 1 GeV protons (2005)

Adam, J. ; Balabekyan, A. R. ; Barashenkov, V. S. ; [et al.]

Springer

The European physical journal 23 (2005), S. 61-68

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ISSN: 1434-601X

Keywords: 28.41.Kw Radioactive wastes, waste disposal ; 29.30.Kv X- and γ-ray spectroscopy ; 02.70.Uu Applications of Monte Carlo methods ; 07.05.Fb Design of experiments

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract. The gamma-ray spectra emitted by decaying of residual nuclei produced by spallation neutrons in (n, xn), (n, xnyp), (n, p), (n, γ) reactions with activation threshold detectors, i.e. 209Bi, 197Au, 59Co, 115In, 232Th, were measured in the Laboratory of Nuclear Problems (LNP), JINR, Dubna, Russia. Spallation neutrons were generated by bombarding a 20 cm long cylindrical lead target with 8 cm diameter surrounded by a 6 cm thick layer of paraffin moderator with 1 GeV proton beam from the NUCLOTRON accelerator. Reaction rates and a spallation neutron spectrum were measured and compared with CASCADE code calculations.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1140/epja/i2004-10031-y

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Levels in 127La fed by the 127Ce beta-decay (2005)

Iimura, H. ; Asai, M. ; Ichikawa, S. ; [et al.]

Springer

The European physical journal 23 (2005), S. 33-39

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ISSN: 1434-601X

Keywords: 23.20.Lv γ transitions and level energies ; 27.60.+j 90 ⩽ A ⩽ 149

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract. The low-lying levels in 127La have been studied through the β-decay of 127Ce ( T1/2 = 29s) produced by bombarding a natMo target with a 185-MeV 35Cl beam. Reaction products were on-line mass-separated, and γ-ray singles and γ-γ coincidence measurements were performed. Conversion electrons were also measured and multipolarities of transitions have been derived. The half-life of the 210.9-keV level was determined to be (1.9±0.3)ns by the β-γ delayed coincidence technique. The level scheme obtained has been compared with calculations based on the Nilsson model.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1140/epja/i2004-10067-y

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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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