Journal Article10.1103/PHYSREVC.23.153
Level structure ofYb174from theYb173(n,γ)reaction
R. C. Greenwood,C. W. Reich +1 more
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TL;DR: In this article, a level scheme was proposed for /sup 174/Yb which contains 47 excited states, with identified de-excitation modes, below 2.35 MeV.
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Abstract: The level structure of /sup 174/Yb has been studied using the /sup 173/Yb(n,..gamma..) reaction with both thermal and 2-keV neutrons. Measurements of ..gamma..-ray energies and intensities were made using Ge(Li) detectors. From these data a neutron separation energy of 7464.8 +- 0.5 keV has been determined for /sup 174/Yb. A level scheme is proposed for /sup 174/Yb which contains 47 excited states, with identified de-excitation modes, below 2.35 MeV. Features of the proposed level scheme include: the K/sup ..pi../=2/sup -/, 0/sup -/, and 3/sup -/ octupole-vibrational bands with band-head energies of 1318, 1710, and 1851 keV, respectively; the ..gamma..-vibrational band at 1634 keV; three excited K/sup ..pi../=0/sup +/ bands with band-head energies of 1487, 1885, and 2100 keV; and, several two-quasiparticle bands with band-head energies in keV (and K/sup ..pi../ assignments) of 1606(3/sup +/), 1624(1/sup +/), 2016(3/sup +/), and 2049(3/sup -/). Configuration assignments for these two-quasiparticle bands are discussed. The available data for the K/sup ..pi../=3/sup +/ band at 1606 keV are not inconsistent with the assumption that it has collective character; and it is suggested that it, together with the lowest-lying 3/sup +/ band in /sup 172/Yb (at 1172 keV), might represent, in the framework of the interacting bosonmore » approximation model, examples of g-boson excitations.« less
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Citations
Test of Axel-Brink predictions by a discrete approach to resonance-averaged (n, γ) spectroscopy
TL;DR: In this article, the authors obtained individual gamma-ray spectra from 48 resonances in the /sup 173/Yb(n,..gamma..) reaction and summing them after appropriate normalizations.
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Levels of Yb174 populated in average resonance neutron capture
TL;DR: In this paper, the primary γ -rays and energy levels in 159 Gd were investigated in average resonance neutron capture using tailored neutron beams at 2 and 24 kV and a pair spectrometer at the high flux reactor at Brookhaven.
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K hindrance in primary {gamma} decay after thermal and average resonance neutron capture
I. Huseby,Trine Spedstad Tveter,L. Bergholt,M. Guttormsen,E. Melby,John Rekstad,Sunniva Siem,R.K. Sheline +7 more
TL;DR: In this paper, the intensity distributions of primary gamma-ray transitions following thermal and average resonance neutron capture have been found to display a dependence on the final-state K quantum number, and the apparent K-hindrance effect is significantly stronger in the thermal than in the average resonance case.
3
Electric dipole transitions from neutron capture in /sup 167/Er resonances
TL;DR: In this article, the authors derived the average E1 gamma strength from 86 neutron resonances in /sup 167/Er in the energy range 5-600 eV and assigned the spins of these resonances as I = 3 or 4 on the basis of the intensity ratios of suitable pairs of low-energy gamma rays.
2
Primary gamma transitions in 173,174Yb in neutron capture at isolated resonances
S.A. Telezhnikov,Carlos Granja,H.T. Hiep,J. Honzátko,M. Kralik,María E. Montero-Cabrera,Stanislav Pospisil +6 more
TL;DR: In this paper, a total of 77 primary gamma transitions are reported populating levels in 174 Yb up to 2.8 MeV in the spin-parity range 1 ±, 2 ±, 3 ±, 4 ±.
References
Internal conversion tables part I: K-, L-, M-shell conversion coefficients for Z=30 to Z=103
R.S. Hager,E.C. Seltzer +1 more
TL;DR: In this article, the internal conversion coefficient, number of electrons per photon emitted in a nuclear transition, is presented from a new relativistic selfconsistent field calculation which takes into account finite nuclear size, hole and exchange effects, experimental electron binding energies, and vacuum polarization.
1.3K
Fluctuations of Nuclear Reaction Widths
Charles E. Porter,R. G. Thomas +1 more
TL;DR: In this paper, the fluctuations of the neutron reduced widths from the resonance region of intermediate and heavy nuclei have been analyzed by a statistical procedure which is based on the method of maximum likelihood.
1.1K
Coulomb excitation of vibrational states in deformed even nuclei
TL;DR: The theory of multiple Coulomb excitation for the different bands was in qualitative agreement with the experimental observations as mentioned in this paper, and the B (E2 values determined from the yields range from 2 to 8 single-particle units, being roughly inversely proportional to the excitation energies for the levels.
159
Photopeak analysis program for photon energy and intensity determinations: Ge(Li) and NaI(Tl) spectrometers☆
TL;DR: In this article, a method of analyzing gamma-ray spectra measured with lithium-ion drifted germanium and NaI(Tl) multichannel spectrometers is described.
115
The (p, t) reactions on nuclei in the rare earth region
TL;DR: In this paper, the (p, t) reactions on isotopic targets of 178, 180 Hf and all the stable isotopes of Yb and on natural targets of Gd, Dy, Er, Hf, Ta, W, Os and Au were studied at a beam energy of 19 MeV with an average resolution of 12 keV.
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