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  • 27.50.+e  (5)
  • 23.20.Lv  (4)
  • 23.20.−g  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Energy of the 5− isomer and (πg 9/2⊗vg 9/2) states in82Rb (1991)
    Springer
    The European physical journal 339 (1991), S. 425-426 
    Details
    ISSN: 1434-601X
    Keywords: 23.20.−g ; 27.50.+e
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Excited states in the doubly-odd nucleus82Rb have been investigated via the reactions79Br(α,n) and78Se(7Li,3n) using in-beamγ-ray spectroscopy. The level energy of the longlived 5− isomer has been determined to 68.3 keV which is below the energy of the 2− state found at 88.9 keV with a lifetime ofΤ=2.4(2) ns. A sequence of positive-parity states beginning with a 6+ level at 191.3 keV (Τ=20(3) ns) and extending to a (10+) level has been interpreted to contain the two-particle configuration (πg 9/2⊗Ν 9/2) and collective excitations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01560649
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  • 2
    Electronic Resource
    Electronic Resource
    73 Se investigated by the (α, nγ) reaction (1990)
    Springer
    The European physical journal 336 (1990), S. 241-242 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.Re ; 23.20.Lv ; 27.60.+j
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The70Ge(α,nγ)73Se reaction was used to populate medium spin states of the73Se nucleus. Spins and parities up to about Iπ=(21/2+)ħ were determined by gamma angular distribution, gamma linear polarization and excitation function measurements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01290628
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    New isomers in83Br,85Rb,85Kr and86Kr (1989)
    Springer
    The European physical journal 332 (1989), S. 33-43 
    Details
    ISSN: 1434-601X
    Keywords: 23.20.Lv ; 23.20.Ck ; 27.50.+ e
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Using methods of in-beam spectroscopy in connection with 35 MeV7Li bombardment of82Se targets four new isomers have been identified. They are observed in83Br at 3070 keV (T1/2=0.6±0.2 μs), in85Rb at 2826 keV (T1/2=12.5±0.6 ns), in85Kr at 1991 keV (T1/2=1.2+ 0.4 1.0 μs) and in86Kr at 2250 keV (T1/2=3.1±0.6 ns). Spin and parity 19/2− have been assigned to the new isomer in85Rb that is interpreted as the coupling of a p3/2 proton to the g 9 2/−2 two-neutron excitation of the N=48 neutron system. Using the TDPAD method an upper limit for the g-factor of ¦g¦≦0.17 has been estimated for this isomer. The same two-neutron excitation is also believed to be responsible for the new isomer in83Br. The new isomers in85Kr and86Kr are interpreted as configurations containing the two-proton excitation (f 5 2/−1 , p 3 2/−1 ) where in the isomeric 17/2+ level of85Kr an additional g9/2 neutron hole is involved.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01292578
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  • 4
    Electronic Resource
    Electronic Resource
    FastM1 transitions in85Rb (1989)
    Springer
    The European physical journal 334 (1989), S. 415-422 
    Details
    ISSN: 1434-601X
    Keywords: 23.20.Lv ; 23.20.Ck ; 27.50.+ e
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Excited states in85Rb have been studied via the82Se(7Li, 4n) reaction by using in-beamγ-ray spectroscopy. On the basis of new experimental data on coincidence relations, angular distributions and linear polarizations of theγ-rays the yrast sequence has been extended up to a 33/2+ level at 7.1 MeV excitation energy. Using the DSA method mean lifetimes have been determined for 9 levels. Above the 21/2+ yrast state 5 fast M1 transitions withB (M 1) ≧0.3 W.u. have been identified. They are interpreted as transitions between recoupled states of the configuration πg9/2ν(g9/2) 8+ −2 or πg9/2(f 5 2 /−1p 3 2−1 )4+ν(g9/2) 8+ −2 .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294747
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  • 5
    Electronic Resource
    Electronic Resource
    Multiplet structure and core-related effects on transition rates in87Y and neighbouringA≈ 90 nuclei (1988)
    Springer
    The European physical journal 330 (1988), S. 45-50 
    Details
    ISSN: 1434-601X
    Keywords: 23.20.Ck ; 27.50.+e ; 21.60.−n
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Bombarding a85Rb target by 27 MeVα-particles the following half-lives of excited states in different nuclei have been determined by means of the generalized controid shift method: in87Y,T 1/2(2827.1 keV)=0.75±0.10 ns,T 1/2(2675.9 keV)=0.25±0.10 ns,T 1/2(3595.3 keV)=0.5±0.2 ns andT 1/2(2986.9, 3094.4 keV)〈0.1 ns; in88Y,T 1/2(232.1 keV)=0.8±0.1 ns and in85Rb,T 1/2(151.2 keV)=0.6±0.1 ns. In87Y, the members of the doublet (vg 9 2/−2 )8+ (πp1/2) are identified. E2 transition rates 21/2+⇒ 17/2+ in odd A≈ 90 nuclei are shown to represent essentially core transitions. Evidence for the existence of seniority-five configurations is found.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01287262
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  • 6
    Electronic Resource
    Electronic Resource
    Collective and two-particle excitations in78Se (1987)
    Springer
    The European physical journal 326 (1987), S. 287-299 
    Details
    ISSN: 1434-601X
    Keywords: 23.20.Lv ; 23.20.Ck ; 27.50.+e
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Excited states in78Se have been studied up to spin (12)ℏ at about 5.8 MeV in the76Ge(α, 2n) reaction using in-beamγ-ray spectroscopy. Mean lifetimes could be determined for 27 of the 33 levels observed by applying Doppler shift and pulsed-beam timing methods. According to theB(E2) values most of the levels have been grouped into collective bands. Irregularities in the level spacings of the yrast band above spin 6ℏ are interpreted to be due to the interaction of the ground state band withg 9/2 two-proton and two-neutron excitations. The mutual mixing of these configurations is reflected by strongM 1 transitions between the mixed states. The interaction strengths between the configurations involved have been estimated from three-band mixing calculations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01297583
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  • 7
    Electronic Resource
    Electronic Resource
    High-spin states in the N=50 nucleus86Kr (1992)
    Springer
    The European physical journal 343 (1992), S. 369-370 
    Details
    ISSN: 1434-601X
    Keywords: 23.20.−g ; 27.50.+e
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract High-spin states in the N=50 nucleus86Kr have been investigated via the82Se(7Li,p2n) reaction using 32 MeV7Li ions. In order to suppress γ-rays arising from pure neutron evaporation the measurements of angular distributions and relative excitation functions of the γ-rays as well as γ-γ coincidences have been performed in particle-γ coincidence modes. Levels with excitation energy up to 7.9 MeV and tentative spins up to (12) have been established. On the basis of systematics tentative assignments of shell model configurations are proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01291539
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  • 8
    Electronic Resource
    Electronic Resource
    A new sequence of high-spin states built on the 17/2+ isomer in85Kr (1992)
    Springer
    The European physical journal 344 (1992), S. 229-230 
    Details
    ISSN: 1434-601X
    Keywords: 23.20.−g ; 27.50.+e
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract High-spin states in85Kr have been studied via in-beam spectroscopy by bombarding a82Se target with 32 MeV7Li ions. Since85Kr is only formed with a small relative cross section proton-γ—γ coincidence techniques have been applied to enhance the γ rays of85Kr, even with respect to those of86Kr, in the measurements. A new sequence of high-spin states with excitation energies up to 4.8 MeV and tentative spins up to (23/2) has been established on top of the 17/2+ Μs isomer. A tentative assignment of the configurationvg 9 2/−1 π(g 9/2 p 3 2/−1 orf 5 2/−1 ) to the new levels is proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01291711
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