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UNIVERSITÄT ZU KÖLN

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MATHEMATISCH-NATURWISSENSCHAFTLICHE FAKULTÄTINSTITUT FÜR KERNPHYSIK




HAUPTNAVIGATION. HINWEIS: BITTE VERWENDEN SIE TAB UM DIE MENÜPUNKTE
ANZUSPRINGEN.

 * Institut
   Zur Übersichtsseite Institut Menü schließen
    * Arbeitsgruppen
      * Prof. Dr. Jan Jolie
      * Prof. Dr. Dennis Mücher
      * Prof. Dr. Peter Reiter
      * Prof. Dr. Andreas Zilges
    * Einrichtungen
      * 10 MV FN-Tandembeschleuniger
      * 6 MV Cologne AMS Tandembeschleuniger
      * Elektronikwerkstatt
      * Entwicklungswerkstatt für Beschleuniger & Beschleuniger-Experimente
    * Mitglieder

 * Arbeitsgruppen
   Zur Übersichtsseite Arbeitsgruppen Menü schließen
    * Prof. Dr. Jan Jolie
      * Fast Timing
      * Plungergruppe
      * Team
      * Publikationen
    * Prof. Dr. Dennis Mücher
      * AMS
      * Astrophysik
      * Medizinphysik
      * Lehre
      * Team
      * Join us
    * Prof. Dr. Peter Reiter
      * Forschung
      * Publikationen
      * Abschlussarbeiten
      * Mitglieder
    * Prof. Dr. Andreas Zilges

 * Forschung
   Zur Übersichtsseite Forschung Menü schließen
    * Experimente am IKP
      * Cologne CATHEDRAL Spektrometer
      * HORUS Spektrometer
    * Publikationen

 * Lehre
   Zur Übersichtsseite Lehre Menü schließen
    * Vorlesungen
    * Praktika
      * Praktikum B
      * Praktikum M
      * Praktikum Moderne Physik III
      * Demopraktikum
    * Physik für Studierende der Medizin & der Neurowissenschaften
      * Termine & Fristen
      * Klausurvorbereitung
      * FAQ
    * Bonn-Cologne Graduate School for Physics and Astronomy

zum Inhalt springen


GRAPHISCHES SLIDER ELEMENT

 * Slide: Kernphysik zum Handanlegen
 * Slide: FN-Tandem Beschleuniger
 * Slide: Kombination von γ- und Teilchenspektroskopie
 * Slide: Cologne CATHEDRAL Spektrometer
 * Slide: MINIBALL @ HIE-ISOLDE
 * Slide: Advanded GAmma Tracking Array

Zurück Weiter
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   AGATA
   
   
   ADVANDED GAMMA TRACKING ARRAY

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   Kontrollraum FN-Tandem Beschleuniger
   
   
   KERNPHYSIK ZUM HANDANLEGEN

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   FN-TANDEM BESCHLEUNIGER

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   SONIC @ HORUS
   
   
   KOMBINATION VON Γ- UND TEILCHENSPEKTROSKOPIE

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   Kernstrukturphysik am IKP
   
   
   COLOGNE CATHEDRAL SPEKTROMETER

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   MINIBALL @ HIE-ISOLDE

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   AGATA
   
   
   ADVANDED GAMMA TRACKING ARRAY

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   Kontrollraum FN-Tandem Beschleuniger
   
   
   KERNPHYSIK ZUM HANDANLEGEN








AKTUELLE PUBLIKATIONEN




ALLE PUBLIKATIONEN


 * Investigating the prolate-to-oblate shape phase transition: Lifetime
   measurements and γ spectroscopy of the low-lying negative parity structure in
   193Os. Knafla, L.; Nomura, K.; Esmaylzadeh, A.; Harter, A.; Jolie, J.;
   Karayonchev, V.; Kim, Y. H.; Köster, U.; Ley, M.; Michelagnoli, C.; Pfeil,
   A.; Régis, J.-M.; von Spee, F. Phys. Rev. C (2024) 109(1), p. 014313.
   
   
    * [ Abstract ]
    * [ DOI ]
   
   
   Excited states in 193Os were populated using a 192Os(n_\th.,γ)193Os thermal
   neutron capture reaction, with neutrons provided by the high-flux reactor of
   the Institut Laue-Langevin in Grenoble, France. Lifetimes of low-spin excited
   states were measured using the generalized centroid difference method. A
   total of eight mean lifetimes of low-lying excited states were determined for
   the first time, and limits for the lifetimes of three further excited states
   were established. Additionally, γ−γ angular correlations were analyzed to
   assign spins to previously known excited states up to 1 MeV, and extract
   multipole mixing ratios for several transitions. The new spectroscopic
   information is compared to calculations in the framework of the interacting
   boson-fermion model, based on the nuclear density functional theory, to
   investigate the prolate-to-oblate shape phase transition, predicted to occur
   in the neutron rich A≈190 region.
 * Prompt gamma rays of terbium induced by inelastic scattering of fission
   neutrons. Ophoven, N.; Ilic, Z.; Mauerhofer, E.; Randriamalala, T. H.;
   Vezhlev, E.; Stieghorst, C.; Révay, Z.; Jolie, J.; Strub, E. J. Radioanal.
   Nucl. Chem. (2024) 333(3), pp. 1287–1300.
   
   
    * [ Abstract ]
    * [ DOI ]
   
   
   Prompt gamma rays of terbium emitted after (n,nʹγ) inelastic scattering
   reactions induced by irradiation of a terbium(III) hexahydrate (TbCl3·6H2O)
   sample with a beam of fission neutrons were investigated with the instrument
   FaNGaS (Fast Neutron-induced Gamma-ray Spectrometry) at an angle of 90°
   between neutron beam and detector. At sample position, the fast-neutron flux
   was 1.13 × 108 cm−2 s−1 and the neutron beam has an average energy of
   2.30 MeV. We identified 124 prompt gamma lines from the 159Tb(n,nʹγ)159Tb
   reaction. Presence of prompt gamma rays from oxygen and chlorine was used for
   a concise verification of recently published results. Relative gamma-ray
   intensities, effective cross sections and fast-neutron spectrum-averaged
   partial production cross sections of the gamma lines are given including
   comparisons with available literature data. We found a reasonable agreement
   and the multitude of unreported lines adds decisive value to nuclear
   spectroscopy. Additionally, we estimated the detection limit of terbium as
   1 mg for a counting time of 12 h.
 * Structure of low-lying states in 116Te. von Spee, F.; Beckers, M.; Blazhev,
   A.; Dewald, A.; Dunkel, F.; Esmaylzadeh, A.; Fransen, C.; Hackenberg, G.;
   Jolie, J.; Knafla, L.; Lakenbrink, C.-D.; Schiffer, M.; Warr, N.; Weinert, M.
   Phys. Rev. C (2024) 109(2), p. 024325.
   
   
    * [ Abstract ]
    * [ DOI ]
   
   
   Low-lying excited levels in 116Te were studied by measuring level lifetimes
   with the recoil-distance Doppler-shift method in the 112Sn(12C,8Be)116Te
   α-transfer reaction and angular correlations following the β decay of 116I.
   Both experiments were performed at the Cologne FN Tandem accelerator. Several
   new levels were discovered below 3.2 MeV excitation energy, spins and
   multipole mixing ratios were determined via angular correlations. Lifetimes
   were measured for the 2_1^+, 0_2^+, 2_2^+, and 4_1^+ and upper limits for
   lifetimes were determined for higher lying levels. The experimental findings
   are compared to calculations in the U(5) limit of the interacting boson model
   and are also discussed in the framework of shape coexistence which is
   expected in midshell Te isotopes.
 * Magnetic moments of thallium isotopes in the vicinity of magic N = 126. Yue,
   Z.; Andreyev, A.N.; Barzakh, A.E.; Borzov, I.N.; Cubiss, J.G.; Algora, A.;
   Au, M.; Balogh, M.; Bara, S.; Bark, R.A.; Bernerd, C.; Borge, M.J.G.;
   Brugnara, D.; Chrysalidis, K.; Cocolios, T.E.; De Witte, H.; Favier, Z.;
   Fraile, L.M.; Fynbo, H.O.U.; Gottardo, A.; Grzywacz, R.; Heinke, R.; Illana,
   A.; Jones, P.M.; Judson, D.S.; Korgul, A.; Köster, U.; Labiche, M.; Le, L.;
   Lica, R.; Madurga, M.; Marginean, N.; Marsh, B.; Mihai, C.; Nácher, E.;
   Neacsu, C.; Nita, C.; Olaizola, B.; Orce, J.N.; Page, C.A.A.; Page, R.D.;
   Pakarinen, J.; Papadakis, P.; Penyazkov, G.; Perea, A.; Piersa-Siłkowska, M.;
   Podolyák, Zs.; Prosnyak, S.D.; Reis, E.; Rothe, S.; Sedlak, M.; Skripnikov,
   L.V.; Sotty, C.; Stegemann, S.; Tengblad, O.; Tolokonnikov, S.V.; Udías,
   J.M.; Van Duppen, P.; Warr, N.; Wojtaczka, W. Phys. Lett. B (2024) 849, p.
   138452.
   
   
    * [ Abstract ]
    * [ DOI ]
   
   
   The magnetic dipole moments (μ) of 209Tlg (N=128) and 207Tlm (N=126) have
   been measured for the first time using the in-source laser
   resonance-ionization spectroscopy technique with the Laser Ion Source and
   Trap (LIST) at ISOLDE (CERN). The application of the LIST suppresses the
   usually overwhelming background of the isobaric francium isotopes and allows
   access to heavy thallium isotopes with A⩾207. The self-consistent theory of
   finite Fermi systems based on the energy density functional by Fayans et al.
   well describes the N dependence of μ for 1/2+ thallium ground states, as well
   as μ for the 11/2− isomeric states in europium, gold and thallium isotopes.
   The inclusion of particle-vibration coupling leads to a better agreement
   between the theory and experiment for μ(Tlg, Iπ=1/2+). It is shown that
   beyond mean-field contributions to μ cannot be neglected at least for
   thallium isotopes with Iπ=1/2+.


WEITERE INFORMATIONEN

INSTITUT FÜR KERNPHYSIK

Universität zu Köln
Zülpicher Str. 77
50937 Köln, Deutschland

Tel: +49 (0) 221 / 470 2796
Fax: +49 (0) 221 / 470 5168


 * Professoren
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 * Prof. Dr. Jan Jolie
 * Prof. Dr. Dennis Mücher
 * Prof. Dr. Peter Reiter
 * Prof. Dr. Andreas Zilges

 * Vorlesungen
 * Praktikum B
 * Praktikum M
 * Praktikum Moderne Physik III
 * Demopraktikum
 * Medizin & Neurowissenschaften





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