0000000000027999
AUTHOR
W. Herzog
Der Zerfall des 2,4-sec100Nb
The nuclide100Nb was produced by irradiation of enriched100Mo targets with 14 MeV-neutrons, and its decay properties were investigated employing scintillation and semiconductor spectrometers and coincidence techniques. A half-life of 2.4±0.3 sec and aQ β-value of 5.8±0.2 MeV were found. From 27 gamma-rays, 20 transitions, representing 95% of the observed gamma-ray intensity, could be placed in a decay scheme comprising 10 excited states of100Mo.
Das Betriebsverhalten von zwei allgemeinen Vierpolen in Kette
Mit Hilfe aufgestellter Formeln fur das Ubertragungsverhalten von zwei Vierpolen in Kette werden Bandfilter aus Tief-und Hochpassen zusammengesetzt. Es wird gezeigt, wie der Entwurf einem Filterkatalog entnommen werden kann, wobei die Abweichung im Dampfungsverlauf von der Summe der Tief- und Hochpasdampfungen gering ist.
Der Zerfall des94Sr
The nuclide94Sr was isolated by chemical separation methods after thermal neutron induced fission of235U. Its decay properties were investigated employing semi-conductor spectrometers and coincidence techniques. A half-life of 74.1±0.3 sec was found. Besides the 1428.3 keV γ-ray we found 4 new γ-rays which could be placed in a decay scheme comprising three excited states of94Y. The 1+ states in theuu-nuclides90,92,94Y and88,90,92Rb are compared.
Der Zerfall des93Sr
The nucleide93Sr was isolated by chemical separation methods after thermal neutron induced fission of235U, and its decay properties were investigated employing scintillation and semiconductor spectrometers and coincidence techniques. A half-life of 7.43±0.03 min and aQβ-value of 4.3±0.2 MeV were found. Out of 74 gamma-rays, 55 transitions, representing 97% of the observed gamma-ray intensity, could be placed in a decay scheme comprising 22 excited states of93Y.
The decay of 31 sec98Zr, 2.9 sec98Nb and 51 min98Nb
TheΒ- andγ-radiations of98Zr and98m, g Nb have been investigated employing scintillation and semiconductor spectrometers and coincidence techniques. Sources of98Nb were produced by the98Mo(n, p)98Nb reaction, sources of98Zr by fission of235U with thermal neutrons applying chemical separations. For98Zr, a half-life of 30.7±0.4 sec and aQ β-value of 2.3±0.2 MeV were obtained, for the98Nb isomers, half-lives of 2.86±0.06 sec and 51.3±0.4 min, andQ β-values of 4.8±0.2 MeV and 4.5±0.2 MeV, respectively. Noγ-rays were observed in the decay of98Zr. The decay of 2.9 sec98Nb was found to involve 11γ-ray transitions. In the decay of 51 min98Nb, 54γ-transitions were detected. Spin and parity of 1+ and…
Der Zerfall des95Sr
The nuclide95Sr was isolated by chemical separation methods after thermal neutron induced fission of235U. It's decay properties were investigated employing semiconductor spectrometers and coincidence techniques. A half-life of 24.4±0.2 sec was found. Out of 29 gamma rays, 25 transitions representing 97% of the observed gamma-ray intensity were placed in a decay scheme comprising 19 excited states of95Y.
Die Zurückführung unsymmetrischer Vierpole zwischen verschiedenen Abschlußwiderständen auf symmetrische Vierpole
Es wird die Bedingung angegeben, unter welcher unsymmetrische Vierpole zwischen ungleichen Abschluswiderstanden die gleiche Frequenzabhangigkeit der Betriebsdampfung aufweisen wie der entsprechende symmetrisch aufgebaute Vierpol. Am Beispiel einesT- und einesII-Gliedes wird aus der symmetrischen Schaltung eine unsymmetrische mit dieser Eigenschaft hergeleitet. Halbiert man einen zwischen gleichen Abschluswiderstanden liegenden symmetrischen Vierpol und gibt Leerlauf- und Kernwiderstand einer Halfte und dem dazugehorigen Abschluswiderstand einen beliebigen reellen Faktor, so ist die Betriebsdampfung bis auf einen reellen Faktor gleich der des symmetrischen Vierpols. Schaltet man zwei symmetr…