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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 306 (1982), S. 211-222 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Postaccelerated58Ni and60Ni beams from the Munich MP tandem have been used to study the compound reactions58Ni→93Nb,92Mo,94Mo and60Ni→92Mo. The final nuclei148Er,150Er and147Ho have been investigated with in-beamγ-spectroscopic methods, such as excitation functions,γγ coincidences, bunched-beam and pulsed-beam techniques. Level schemes of148Er,150Er and147Ho have been established with the following level energies, spins, parities and half-lives:148Er: 646.6 keV 2+; 1,524.0(4+); 2,254.3(5−); 2,526.9(6+); 2,537.3(7−), 2,706.0(7−, 8−); 2,784.4(8+); 2,915.5(10+) 13±3 μs150Er: 1,578.9 keV 2+; 1,786.4 3−; 2,261.2(5−); 2,634.1(7−); 2,734.3(8+); 2,798.3(10+) 2.7±0.2 us; 4,001.9; 4,491.8; 4,886.0; 5,222.7147Ho: 765.4; 1,737.2; 2,355; 2,656.6 The level scheme of150Er has been discussed in the framework of the seniority scheme. Perfect agreement with the experiment has been found for the predictions of this scheme for the half-lives of 10+ states inN=82 isotones. This is the first nuclear region where the predictions of the seniority scheme have been observed without strong perturbation.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 299 (1981), S. 113-117 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Usingγγ coincidences theEC(K)/β + ratio for theβ decay148Dy→148Tb has been determined.148Dy has been produced through the irradiation of93Nb with 249 MeV58Ni ions. The mass of148Dy has been deduced. With the help of knownQα values the masses of152Er,156Yb,160Hf and164W have been obtained. The experimental masses are compared with different current mass formulae.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 306 (1982), S. 223-234 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Postaccelerated58Ni beams from the Munich tandem have been used to study the residual activities of the compound reactions58Ni→90Zr,91Zr,92Zr,93Nb,92Mo,94Mo with the help ofγ excitation functions, multi spectrum analyses ofγ radiation,γγ coincidences and the measurement of the ratio EC/gb +. Beta decay schemes for the following new isotopes or isomers have been derived:144Tb (6−, 7−) 4.5±0.5 s144Tb 1+ 1.5±1 s145Tb (11/2−) 29 s146Tb 1+ 8±4 s145Dy 13.6±1 s146Dy 0+ 29±3 s147Ho (11/2−) 5.8±0.4 s148Ho 1+ 2.2±1.1 s150Ho (2−) 72±4 s148Er 0+ 4.5±0.4 s150Er 0+ 18.5±0.7 s148TmJ≧6 0.7±0.2 s150Tm (4−, 5−) 3.5±0.6 s TheQ EC value for theβ decay of150Er to150Ho has been measured to be 4,010±80 keV with respect to the 2− state in150Ho.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 305 (1982), S. 297-306 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In the course of systematic studies of very proton rich nuclei in theN≈82 region with Ni induced compound reactions, an unusually long-lived high spin isomer has been found. After in-and off-beamγ and conversion electron measurements, asγ excitation functions,γ andeγ coincidences, pulsed beam techniques and multi spectrum analyses of the residual activities, this isomer has been tentatively assigned to be a 10+ state in146Dy, which decays into two 7− states byE3 transitions. The half-life of the isomer has been measured to be 150±20ms. The isomer has been found to follow the β decay of the previously unknown 3.9 s isotope146Ho. The mechanism of the appearance of such an isomer is discussed.
    Type of Medium: Electronic Resource
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