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  • 1
    Electronic Resource
    Electronic Resource
    Response of wheatgrasses and wheat × wheatgrass hybrids to barley yellow dwarf virus (1989)
    Springer
    Theoretical and applied genetics 77 (1989), S. 369-374 
    Details
    ISSN: 1432-2242
    Keywords: Barley yellow dwarf virus (BYDV) ; Wheat-grasses ; Wheat × Agropyron hybrids ; ELISA
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Resistance to barley yellow dwarf virus (BYDV), manifested by low enzyme-linked immunosorbent assay (ELISA) values in plants exposed to viruliferous aphids, was identified in several wheatgrasses (Agropyron spp.). ELISA results were similar for root and leaf extracts of infested plants. No difference in reaction to BYDV was found between plants grown in the field and those in the growth chamber. Interspecific hybrids were generated using pollen from single resistant plants of Agropyron spp. to pollinate soft red winter wheat spikes. Resistance in hybrids appeared to be at the level of virus replication rather than at the level of vector inoculation. The hybrids varied in their reaction to BYDV. Expression of BYDV resistance in hybrids was influenced not only by wheat genotype and Agropyron species but, in some cases, reaction varied even among hybrids between the same wheat genotype and Agropyron plant. Implications of these results are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00305830
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  • 2
    Electronic Resource
    Electronic Resource
    Enhanced octupole collectivity at double subshell closure in the96Zr region (1988)
    Springer
    The European physical journal 331 (1988), S. 97-98 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A value of 84 ± 44 ps has been established for the half-life of the first 3− state of96Zr, using the centroid shift method. It is shown that the corresponding large electric octupole transition strength is in accordance with systematics, suggesting largest octupole collectivity when both the 1g9/2 Proton and 1h11/2 neutron orbitals are nearly empty due to the Z=40, N=56 double subshell closure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01289436
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  • 3
    Electronic Resource
    Electronic Resource
    The collectivity in the yrast band of100Zr: the half-life of the 4 1 + state (1989)
    Springer
    The European physical journal 334 (1989), S. 519-520 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The half-lives of the 2+ and 4+ levels of the yrast band in100Zr have been determined to be 0.54(4) ns and 37(4) ps, respectively, at the fission-product separator JOSEF, in a β−- γ- γ coincidence experiment which exploited the fast timing properties of plastic and BaF2 detectors. The half- life of the 41 + state corresponds to an intrinsic quadrupole moment of ¦Q0¦=3.14(17)b which confirms the strongly deformed nature, in a way independent of the configuration mixing in the ground state. The value of t1/2(21 +) corroborates a recently published value. There is evidence for a decrease of ¦Q0¦ with increasing spin in the yrast bands of the N=60 isotones98Sr and100Zr.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294762
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  • 4
    Electronic Resource
    Electronic Resource
    A new high-spin isomer in 39 97 Y58 (1986)
    Springer
    The European physical journal 323 (1986), S. 59-67 
    Details
    ISSN: 1434-601X
    Keywords: 25.85.Ec ; 23.20.Lv ; 27.60.+j
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An isomeric state at 3,523 keV excitation energy in97Y with a half-life of 144(10) ms has been discovered with the fission-product separator JOSEF. This isomer is depopulated through aγ transition of 162 keV. AnE3 multipolarity for this transition is consistent with the measured conversion coefficients ofα K =0.98(20) andα T =1.00(19). Subsequent electromagnetic transitions populate several new97Y levels which have high spins. For the isomer the three-quasiparticle configuration [πg 9/2⊗ν(h 11/2,g 7/2)]27/2− is proposed. TheE3 transition with a strength about 2 single-particle units is supposed to be of the typeh 11 2/+1 →d 5 2/−1 . These findings provide evidence for the rapid shape transition atA≃100 since they indicate shell-model character of 39 97 Y58 even at high excitation energies while the immediate neighbour 39 98 Y59 contains a rotational band based on a level at 495 keV.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294555
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  • 5
    Electronic Resource
    Electronic Resource
    Structure of low-lying levels in91Rb and93Rb (1986)
    Springer
    The European physical journal 325 (1986), S. 139-147 
    Details
    ISSN: 1434-601X
    Keywords: 23.20.Ck ; 21.60.Fw ; 27.60.+j
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Life-times of low-lying levels in 37 91 Rb54 and 37 93 Rb56 have been determined fromβ −−γ coincidence measurements at the fission-product separator JOSEF. Values oft 1/2=17.0(8) ns and 2.0(2) ns have been obtained for the levels at 1,134 keV in91Rb and 267 keV in93Rb, respectively, and upper limits could be deduced for several other states. Calculations in the frame of IBFM/PTQM have been performed for91Rb, the results of which allow an interpretation of the low-lying levels of this nucleus. For the 1,134 keV level the configuration [πg 9/2⊗2+] 7/2+ is suggested which lies close to or even below the 9/2 1 + level. The calculated half-life of 14 ns for the 1,134 keV level reproduces well the experimental value. The half-life of the 267 keV level in93Rb favours the assignment ofI π=1/2− to this state over the alternative 3/2−.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01289644
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  • 6
    Electronic Resource
    Electronic Resource
    The deformation of101Zr (1987)
    Springer
    The European physical journal 326 (1987), S. 233-234 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The life-time of the first excited member of the ground-state band in101Zr has been determined to 0.9(3) ns through the measurement of γ-γ-delayed coincidences with Ge detectors at the fission-product separator JOSEF. The result shows that this nucleus is strongly deformed with |ß|=0.32(6). This finding provides further important evidence for the fact that the odd-mass nuclei at A ~ 100 with more than 59 neutrons are good rotors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01283601
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  • 7
    Electronic Resource
    Electronic Resource
    The ground-state deformation of98Sr (1987)
    Springer
    The European physical journal 327 (1987), S. 483-484 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The half-life of the first excited state (2 1 + ) of98Sr has been determined through the measurement of delayed γ-γ coincidences at the fission product separator OSTIS to t1/2=2.74(12) ns. This value is smaller than those obtained earlier from β− — conversion electron delayed coincidences and it indicates a stronger collectivity of the 2 1 + →0 1 + transition in98Sr [B(E2)=98 (3) spu] than in100Sr [B(E2)=79(3) spu] which is normally assumed to be the better rotor.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01289575
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  • 8
    Electronic Resource
    Electronic Resource
    Shape coexistence in theN=59 isotone97Sr (1988)
    Springer
    The European physical journal 330 (1988), S. 347-348 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Experimental evidence for shape coexistence in the N=59 isotone97Sr is presented. The ground state and the lowest excited levels are confirmed to be spherical. At 585.1 keV, a K=3/2 rotational band built on the v[422 3/2] Nilsson configuration has been identified. Nilsson orbital assignments for three further levels of deformed origin are proposed. The results are compared to RPA shell-model predictions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294883
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  • 9
    Electronic Resource
    Electronic Resource
    Structure of the neutron-rich nucleus 37 94 rb57 (1989)
    Springer
    The European physical journal 334 (1989), S. 259-267 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.Pc ; 21.60.Fw ; 27.60.+j
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A level scheme has been established for 37 94 Rb57 based on studies at the fission-product separator JOSEF ofγγ coincidences following theβ- decay of94Kr. For the 190.7 keV level a half-life of 2.5(8) ns has been determined through the centroid-shift method. The majorβ-decay branch of94Kr proceeds with log ft=3.7 into the 988.4 keV state in94Rb. This transition must be of the 0+→1+ GT type involving the transitionνg7/2→πg9/2. IBFFM calculations have been performed for94Rb, starting from the parametrization used in the previous IBM investigations for the isotope93Rb and the isotone96Y. A theoretical interpretation of the low-lying levels including propositions for the spins is given in a comparison to the available data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01284553
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