ISSN:
1434-601X
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Physik
Notizen:
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.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF01415123
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