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Digitale Medien

P-wave charmonium decays into baryon and antibaryon pairs in quark pair creation model (2005)

Ping, R. G. ; Zou, B. S. ; Chiang, H. C.

Springer

The European physical journal 23 (2005), S. 129-133

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ISSN: 1434-601X

Schlagwort(e): 13.25.Gv Decays of J/ψ, ϒ, and other quarkonia ; 12.39.Jh Nonrelativistic quark model ; 14.20.Jn Hyperons

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract. A simple quark pair creation model is introduced to study exclusive decays of χ{c_J} into baryon-antibaryon pairs. With this simple model, some exclusive decay processes, for example, χ{c0} → B¯ (B = Λ,Σ0,Ξ-) are investigated and their decay widths are evaluated by inclusion of the properties of outgoing baryons, and the results show that the strengthened decay channels χ{c_J} → Λ¯(J = 0, 2) are easily understood by considering only the color singlet contribution of P-wave charmonium.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1140/epja/i2004-10069-9

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Digitale Medien

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

Iimura, H. ; Asai, M. ; Ichikawa, S. ; [weitere]

Springer

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

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ISSN: 1434-601X

Schlagwort(e): 23.20.Lv γ transitions and level energies ; 27.60.+j 90 ⩽ A ⩽ 149

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: 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.

Materialart: Digitale Medien

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. ; [weitere]

Springer

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

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ISSN: 1434-601X

Schlagwort(e): 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

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: 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.

Materialart: Digitale Medien

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

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