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CERN Document Server 找到 43 笔记录  1 - 10下一个最後  跳到记录: 检索需时 1.25 秒. 
1.
Collective excitations in the transitional nuclei /sup 224,226,228,230 /Ra / Kurcewicz, W ; Bjørnstad, T ; Kaffrell, N ; Nyman, G H ; Ruchowska, E
The gamma -rays following the beta -decay of /sup 224,226,228,230/Fr have been investigated by means of gamma -ray singles (including multispectrum analysis) and gamma gamma coincidence measurements using Ge(Li) spectrometers. The study of the excited levels in /sup 224,226,228,230/Ra is focused on the properties of collective states. [...]
CERN, 1981 Published version from CERN: PDF;
In : 4th International Conference on Nuclei Far from Stability, Helsingør, Denmark, 7 - 13 Jun 1981, pp.649-52 (CERN-1981-009)
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2.
Rapid continuous chemical methods for studies of nuclei far from stability / Trautmann, N ; Broden, K ; Eriksen, D ; Gaggeler, H ; Greulich, N ; Hickmann, U ; Kaffrell, N ; Skarnemark, G ; Stender, E ; Zendel, M
Fast continuous separation methods accomplished by combining a gas-jet recoil-transport system with a variety of chemical systems are described. Procedures for the isolation of individual elements from fission product mixtures with the multistage solvent extraction facility SISAK are presented. [...]
CERN, 1981 Published version from CERN: PDF;
In : 4th International Conference on Nuclei Far from Stability, Helsingør, Denmark, 7 - 13 Jun 1981, pp.727-31 (CERN-1981-009)
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3.
Phase transition in nuclear shape in the A approximately=100 region? / Stachel, J ; Broden, K ; Emling, H ; Eriksen, D ; Folger, H ; Grosse, E ; Kaffrell, N ; Kulessa, R ; Schwalm, D ; Skarnemark, G et al.
Two different types of experiments for the investigation of the neutron-rich Ru-isotopes are presented. A discussion of the neutron- rich isotopes of the A approximately=100 transitional region is given in the framework of the Interacting Boson Model. [...]
CERN, 1981 Published version from CERN: PDF;
In : 4th International Conference on Nuclei Far from Stability, Helsingør, Denmark, 7 - 13 Jun 1981, pp.436-41 (CERN-1981-009)
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4.
Decay properties of neutron-rich nuclei in the mass region A ~ 100 / Kaffrell, N (Mainz U.) ; Ahrens, H (GSI, Darmstadt) ; Franz, G (Mainz U.) ; Herrmann, G (Mainz U.) ; Klein, G (Mainz U.) ; Sümmerer, K (Mainz U.) ; Tittel, G (Mainz U.) ; Trautmann, N (Mainz U. ; Mainz U.)
Neutron-rich nuclei in the mass region A approximately 100 have been investigated by measurement of gamma singles and gamma - gamma coincidence spectra. The activities have been produced by thermal- neutron induced fission of /sup 235/U, /sup 239/Pu and /sup 249/Cf using automated chemical procedures for the separation of Y, Zr, Nb, Mo, Tc or Ru from the fission product mixtures. [...]
CERN, 1976 Published version from CERN: PDF;
In : 3rd International Conference on Nuclei Far from Stability, Cargese, France, 19 - 26 May 1976, pp.483-487 (CERN-1976-013)
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5.
Some studies on neutron-rich nuclei / Herrmann, G ; Denig, R ; Herzog, W ; Hübscher D ; Kaffrell, N ; Kratz, K L ; Trautmann, N
Geneva : CERN, 1970 Published version from CERN: PDF;
In : International Conference on the Properties of Nuclei far from the Region of $\beta$ Stability, v.2, Leysin, Switzerland, 31 Aug - 4 Sep 1970, pp.985-1000 (CERN-1970-030-V-2)
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6.
The nuclear structure of $^{229}$Th / ISOLDE Collaboration
The $\gamma$-rays following the $\beta\!^{-}$-decay of $^{229}$Ac have been investigated by means of $\gamma$-ray singles and $\gamma\gamma$-coincidence measurements using Ge detectors. Multipolarities of 40 transitions in $^{229}$Th have been established by measuring conversion electrons with a mini-orange electron spectrometer. [...]
2002 - Published in : Nucl. Phys. A 703 (2002) 45-69
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7.
Quadrupole-deformed and octupole collective bands in $^{228}$Ra / ISOLDE Collaboration
Spins and parities for collective states in $^{228}$Ra have been determined from conversion electron measurements with a mini-orange $\beta$-spectrometer. The fast-timing $\beta\gamma\gamma(t)$ method has been used to measure lifetimes of T$_{1/2}$=550(20) ps and 181(3) ps for the $2^{+}_{1}$ and $4^{+}_{1}$ members of the K=0$^{+}$ band, and T$_{1/2} \leqslant$ 7 ps and $\leqslant$ 6 ps for the $1^{-}_{1}$ and $3^{-}_1$ members of the K = $0^{-}$ band, respectively The quadrupole moments, $Q_{0}$ deduced from the B (E2; 2$_{1}^{+} \rightarrow 0_{1}^{+}$) and B (E2; 4$_{1}^{+} \rightarrow 2_1^{+}$) rates are in good agreement with the previously measured value and the systematics of the region. [...]
CERN-EP-98-002.- Geneva : CERN, 1998 - 18 p. - Published in : Nucl. Phys. A 636 (1998) 28-46 Fulltext: PDF; - CERN library copies
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8.
Search for stable octupole deformation in $^{225}$Fr / ISOLDE Collaboration
Levels in $^{225}$Fr have been studied by $\gamma$-ray and conversion-electron spectroscopy following the $\beta$-decay of $^{225}$Rn, and by the $^{226}$Ra(t,$\alpha$)$^{225}$Fr single-proton-pickup reaction. Multipolarities were obtained for $\sim$ 50 $\gamma$-transitions, and a level scheme was established in which definite spin-parity values were determined for over 20 of the 48 levels. [...]
CERN-PPE-96-144.- Geneva : CERN, 1997 - 54 p. - Published in : Nucl. Phys. A 612 (1997) 91-142 Fulltext: PS.GZ; Source files restricted to CERN users: ZIP; - CERN library copies
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9.
Twin rotational bands at the onset of deformation in neutron-rich Sr isotopes / Lhersonneau, G ; Gabelmann, H ; Heyde, Kris L G ; Kaffrell, N ; Kratz, K L ; Pfeiffer, B /ISOLDE Collaboration
1990
In : International Conference on the Spectroscopy of Heavy Nuclei, Heraklion, Greece, 25 Jun - 1 Jul 1989, pp.433-438
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10.
Spectroscopic studies of francium 225 / ISOLDE Collaboration
1987.
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