Yields and Half-Lives in the Mass-99 Fission-Product Chain

Troutner, D.E.; Ferguson, R. L.; O'Kelley, G.D.

doi:10.1103/physrev.130.1466

Cited by 17 publications

(19 citation statements)

References 4 publications

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“…"A 468±3 keV line and a 548±3 keV line were detected as members of a γ-γ cascade in the coincidence investigations. They were assigned to 99 Zr" The extracted half-life of 2.4(1) s agrees with the currently adopted value of 2.1(1) s. Previously only an upper limit of 1.6 s [87] was reported for the half-life of 99 Zr and a measurement of 35(5) s [86] was evidently incorrect.…”

Section: Zrsupporting

confidence: 68%

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Discovery of yttrium, zirconium, niobium, technetium, and ruthenium isotopes

Nystrom

Thoennessen²

2012

Atomic Data and Nuclear Data Tables

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Section: Zrsupporting

confidence: 68%

“…The observation of 86 Nb was reported in "Decay of 87 Nb. The New Isotope 86 Nb," by Votsilka et al in 1974 [99].…”

Section: Nbmentioning

confidence: 85%

Discovery of yttrium, zirconium, niobium, technetium, and ruthenium isotopes

Nystrom

Thoennessen²

2012

Atomic Data and Nuclear Data Tables

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“…The ground state is interpreted as lg9/2 proton configuration [,16] in agreement with the systematics of lighter odd Nb isotopes. The balance of the 7-intensities shows that the 365.1 keV level is the /J-decaying isomer which has been postulated in [14]. It presumably has the configuration ~(2pl/2 )-1 (199/2)2 in accordance with the spin assignment of [-16].…”

Section: Zr--~ 99nbmentioning

confidence: 70%

Theβ-decays of99Y and99Zr and the level schemes of99Zr and99Nb

et al. 1979

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The/J-decays of 99y and 99Zr have been investigated with the two recoil fission product separators JOSEF and LOHENGRIN. Half-lives of 1.51_+0.08s and 2.1_+0.1 s respectively, have been determined. A/J-decaying isomeric state has been observed in 99y. 99 99The level schemes of 4oZr59 and 4~Nb58 have been established from ),-ray spectroscopy. Absolute 7-intensities have been obtained by means of two independent techniques. Halflives of 293 _+ 10 ns for the 251.9 keV state and 10.2 • 1.5 ns for the 614.0 or 667.2 keV level in 99Zr have been measured through delayed /3,7-and 7,?,-coincidence experiments.Values for the spins and parities of the low lying levels in 99Zr are proposed in accordance with the systematics of lighter odd Zr isotopes. Spins and partities are assigned to some levels in 99Nb from 7,7-angular correlation measurements. In this nucleus there is evidence for three-particle configurations of some excited states, where the odd proton is coupled to two neutrons which are in different orbits.

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“…In similar studies, long-lived daughter products were precipitated in the form of the following species : hydroxides of yttrium (195) , zirconium, niobium (196), and lanthanum (87,197) ; iodates of cerium(IV) (87) and zirconium (198) ; tin sulfides (199) , elemental tellurium (169) , and oxalates of indium and tin (200). A few examples are the detection of 10-sec 99Nb (196) , 12-sec 144Ba (197), and 13-sec 12 1 Cd (200) .…”

Section: 1mentioning

confidence: 94%

“…A few examples are the detection of 10-sec 99Nb (196) , 12-sec 144Ba (197), and 13-sec 12 1 Cd (200) .…”

Section: 1mentioning

confidence: 98%