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AbstractAbstract
[en] The level structures of the N = 89 157Er and N = 87 155Er nuclei have been investigated through the decay of 157Tm (Tsub(1/2) = 3.3 min) and 155Tm (Tsub(1/2) = 25 s). Mass separated samples were obtained from the ISOCELE 1 on-line separator. Gamma ray spectra, conversion electron spectra and γ-γ bi-dimensional coincidences were examined, and lead to proposed level schemes for these transitional nuclei
[fr]
On etudie les decroissances β+ + CE de 157Tm (Tsub(1/2) = 3,3 min) et 155Tm (Tsub(1/2) = 25 s) sur les niveaux de 157Er (N = 89) et 155Er (N = 87). Les sources isotopiquement pures ont ete obtenues grace au separateur ISOCELE 1 en ligne avec le synchrocyclotron d'Orsay. L'etude des spectres gamma, des spectres d'electrons de conversion et des coincidences bidimensionnelles γ-γ a permis de proposer des schemas de niveaux pour ces noyaux de la zone de transitionOriginal Title
Etude de la decroissance de 157Tm (Tsub(1/2) = 3,3 min) et de 155Tm (Tsub(1/2) = 25 s)
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J. Phys. (paris); v. 38(5); p. 435-447
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Aguer, P.; Bastin, G.; Liang, C.F.; Libert, J.; Paris, P.; Peghaire, A.
Paris-11 Univ., 91 - Orsay (France). Centre de Spectrometrie Nucleaire et de Spectrometrie de Masse1976
Paris-11 Univ., 91 - Orsay (France). Centre de Spectrometrie Nucleaire et de Spectrometrie de Masse1976
AbstractAbstract
No abstract available
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1976; 1 p; 3. International conference on nuclei far from stability; Cargese, Corsica, France; 19 May 1976; Published in summary form only.
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AbstractAbstract
[en] The (7/2)[523] and (7/2)[404] bands are observed in 159Tm to I = (61/2) and (43/2), respectively, well beyond the i/sub 13/2/ neutron backbend. Before the backbend, the (7/2)[523] band exhibits large signature splitting, the (7/2)[404] none, which is interpreted as resulting from the very different driving influences of the K = (7/2) h/sub 11/2/, and g/sub 7/2/ orbits, respectively, on the core triaxiality. The i/sub 13/2/ neutron alignment changes the signature splitting in each band as a result of its dominant driving force to positive values of γ. Measured B(M1;I→I-1)/B(E2;I→I-2) values increase dramatically after the backbend, and this is explained in terms of calculated increases in the M1 transition rates and decreases in the E2 rates
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Physical Review. C, Nuclear Physics; ISSN 0556-2813;
; v. 29(5); p. 1934-1937

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AbstractAbstract
[en] Two methods have been used to obtain values of the effective moment of inertia of very-high-spin (20h-bar--50h-bar) states populated in heavy-ion compound-nucleus reactions. The 162Yb nucleus studied has effective moments of inertia smaller than, but approaching, the rigid-body estimate
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Physical Review Letters; v. 36(7); p. 359-361
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AbstractAbstract
[en] The existance of the 4.8+-0.2 min 160Yb activity has been established. Five gamma-transitions with energies (in keV) and their relative intensities (in parentheses):132.23(9.9), 140.35(16.6), 173.76(77.4), 215.78(32.0), and 372.24(3.5) were found and assigned to decay of this isotope. (author)
Original Title
Identifikatsiya izotopa 160Yb, Tsub(1/2)=(4.80+-0.2)
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Acta Physica Polonica. Series B; v. 6(3); p. 427-431
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Byrski, T.; Beck, F.A.; Gehringer, C.; Merdinger, J.C.; Schutz, Y.; Vivien, J.P.
International conference on nuclear behaviour at high angular momentum. Contributions, Strasbourg, 22-24 April 19801980
International conference on nuclear behaviour at high angular momentum. Contributions, Strasbourg, 22-24 April 19801980
AbstractAbstract
No abstract available
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Source
Strasbourg-1 Univ., 67 (France). Centre de Recherches Nucleaires; 180 p; Apr 1980; p. 87-88; International conference on nuclear behaviour at high angular momentum; Strasbourg, France; 22 - 24 Apr 1980; Published in summary form only.
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Adam, I.; Bajer, G.; Gonusek, M.; Gromov, K.Ya.; Zibert, Kh.-U.; Kalinnikov, V.G.; Lyatushinski, A.; Shtrusnyj, Kh.; Yakhim, M.
Program and abstracts of 24. conference on nuclear spectroscopy and nuclear structure, Kharkov, 29 January - 1 February 19741974
Program and abstracts of 24. conference on nuclear spectroscopy and nuclear structure, Kharkov, 29 January - 1 February 19741974
AbstractAbstract
No abstract available
Original Title
Novyj izotop 161Yb (Tsub(1/2)=(4,2+-0,2) min)
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AN SSSR, Moscow; Gosudarstvennyj Komitet po Ispol'zovaniyu Atomnoj Ehnergii SSSR, Moscow; p. 118, 120; 1974; 24. conference on nuclear spectroscopy and nuclear structure; Kharkov, Ukrainian SSR; 29 Jan 1974; 4 refs.; published in summary form only.
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AbstractAbstract
[en] High resolution interference and intermodulated optogalvanic saturation spectroscopy has been applied for isotope shift (IS) studies in the ground-configuration 4f126s2 of Er I. For the isotope pairs 170-166Er and 168-166Er the results confirm a strong J- and term dependence of the IS caused through crossed-second-order (CSO) effects. We performed a parametric analysis to evaluate the CSO-parameters z4f for the interpretation of the J-dependence and T(3H), T(3F), T(1G) to describe the term dependence. The following parameter values (in MHz) were determined, for 170-166Er: z4f=40.1(0.6), T(3F)=-153(5), T(3H)=-220(6), and T(1G)=-79(4); for 168-166Er: z4f=20.1(0.7), T(3F)=-77(6), T(3H)=-111(7), and T(1G)=-43(5). The normalization of these parameters with the corresponding nuclear parameters λ for both isotope pairs leads to almost identical parameter values indicating a dominant influence of the field shift effect in second-order for the z4f parameter and in third-order for the parameters T(3F), T(3H), and T(1G). (orig.)
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Clieves, H.P.
Hannover Univ. (Germany, F.R.). Fakultaet fuer Mathematik und Naturwissenschaften1978
Hannover Univ. (Germany, F.R.). Fakultaet fuer Mathematik und Naturwissenschaften1978
AbstractAbstract
[en] The hyperfine structure of 21 lines in the Gd-II spectrum was measured with a photoelectric Fabry-Perot-spectrometer. From these results tje electric quadrupole moment of 157Gd was determined. (WL)
Original Title
Hyperfeinstrukturuntersuchungen im Gadolinium II-Spektrum mit dem Verfahren der Strukturanalyse und Bestimmung des Quadrupolmoments des 157GD
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2 May 1978; 93 p; Diss. (D.Sc.).
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AbstractAbstract
[en] The hfs of the 61P1 state of 173Yb has been investigated by level-crossing and anticrossing spectroscopy. From an optimal fit of experimental and calculated signal curves the authors obtain the hfs coupling constants: A = 58.45(80) MHz, B = 589.6(13.0) MHz. (Auth.)
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Physics Letters. A; v. 59(6); p. 433-434
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