Rotational Bands in Asymmetrically Deformed<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Th</mml:mi></mml:mrow><mml:mprescripts/><mml:mrow/><mml:mrow><mml:mn>231</mml:mn></mml:mrow><mml:mrow/><mml:mrow/></mml:mmultiscripts></mml:mrow></mml:math>

Blons, J.; Mazur, C.; Paya, D.; Ribrag, M.; Weigmann, H.

doi:10.1103/physrevlett.41.1282

Cited by 77 publications

(41 citation statements)

References 5 publications

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“…Subbarrier resonances at about 5 MeV excitation energy have been observed previously in many actinide nuclei [9,16]. Based on the modest energy resolution measurements, these were believed to arise from the 0031-9007͞98͞80(10)͞2073(4)$15.00coupling of compound nuclear states in the first potential well to vibrations of the fission degree of freedom of the second potential well.…”

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confidence: 99%

“…Experimentally, the very large quadrupole and octupole moments of the HD states manifest themselves by the presence of alternating parity bands with very large moments of inertia [9]. With the aim of delineating new HD structure Blons and co-workers [10,11] measured the subbarrier resonances of the fission probability for several Th and U isotopes with high energy resolution.…”

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Experimental Evidence for Hyperdeformed States in U Isotopes

et al. 1998

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Experimental Evidence for Hyperdeformed States in U IsotopesKrasznahorkayGeneral rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal Take down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. VOLUME 80, NUMBER 10 P H Y S I C A L R E V I E W L E T T E R S 9 MARCH 1998 Experimental Evidence for Hyperdeformed States in U Isotopes

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Experimental Evidence for Hyperdeformed States in U Isotopes

et al. 1998

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“…In contrast in the Ra-Th region prominent resonances in the fission probability are observed [2,3]. Furthermore a new phenomenon [4] appears with thorium isotopes where intermediate structures, within a broader resonance, are resolved and can be interpreted in terms of rotational bands. These bands have a rotational constant lower than in the measured isomeric bands of heavier actinides [5].…”

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confidence: 93%

Experimental investigation on the possible complexity in the potential energy surface of232Th

et al. 1982

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The reaction 232Th(7,f) is studied using bremsstrahlung 7-beams in the (5.45-6.85) MeV end point energy range. Fragments angular distributions are measured and yield components with opposite parities are separated. The unfolded cross sections have resonant behaviour which indicates the existence of low damped vibrational states. Furthermore, a near degeneracy for K~=0 § and K~=0 -resonances at ~5.5 MeV and ~6 MeV is observed. Data are analysed in terms of a double humped barrier configuration within the doorway state model for fission. For each component maxima with ahnost equal heights and a shallow intermediate minimum are determined. Moreover almost equal potential barriers with K=0 and opposite parities are found. This is a signature for mass-asymmetric shapes and seems a clear indication for a threehumped barrier configuration with a low inner maximum and a third mass asymmetric shallow minimum due to the fragmentation of the normal mass-asymmetric second maximum.

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“…A third minimum hypothesis was confirmed in refs. [2][3][4]. The fine structure of the 0.7 MeV resonance investigated in terms of the rotational model with two Ω = 1/2 band heads of opposite parities revealed a moment of inertia parameter 2 /2J of about 1.9 keV.…”

Section: Introductionmentioning

confidence: 99%

Fine structure in the intermediate resonance region of the neutron induced fission cross section

Mirea¹,

Tassan‐Got

2007

Nd2007

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Abstract. Recently, the fine structure of the 0.7 MeV resonance in the 230 Th neutron-induced cross section was investigated within the hybrid model. A very good agreement with experimental data is obtained. It is suggested that fine structure of the cross section quantify the changes of the intrinsic states of the nucleus during the disintegration process. Due to internal excitations produced in the region of the outer barrier, where the density of single-particle states is enhanced, new transitions levels are produced. These transitions levels cause β-resonances very close in energy. A way to introduce phenomenologically this phenomenon in cross section calculations is presented.

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Rotational Bands in Asymmetrically DeformedTh231

Cited by 77 publications

References 5 publications

Experimental Evidence for Hyperdeformed States in U Isotopes

Experimental Evidence for Hyperdeformed States in U Isotopes

Experimental investigation on the possible complexity in the potential energy surface of232Th

Fine structure in the intermediate resonance region of the neutron induced fission cross section

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