Structure of high-spin states in 232Th, 234U and 236U

Ower, H.; Elze, Th. W.; Idzko, J.; Stelzer, K.; Grosse, E.; Emling, H.; Fuchs, Philipp; Schwalm, D.; Wollersheim, H. J.; Kaffrell, Ν.; Trautmann, Ν.

doi:10.1016/0375-9474(82)90423-7

Cited by 77 publications

(26 citation statements)

References 23 publications

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“…The lifetimes in the ground-state band of 2S2Th have previously been measured employing the RDM [9] and B(E2) values have been independently determined from the y-ray yields observed in a Coulomb-excitation experiment [10]. From both experiments it can be concluded that ;SYTh is well described within the rigid rotor model, given a constant transition quadrupole moment of Qt = 9.62(2) eb.…”

Section: Analysis and Resultsmentioning

confidence: 99%

Lifetime of the two-phonon vibrational state in232Th

Körten

Bröcking

Hübel

et al. 1995

Z. Physik A - Hadrons and Nuclei

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Abstract.We report on a measurement of the lifetime of the 1414 keV state in 232Th by the Doppler-shift recoildistance method. This 4 + state shows all characteristics of a nearly-harmonic two-phonon 7-vibrational excitation. The result for the B(E2) value obtained from the lifetime, --3.2 _+ 0.7 ps, is in agreement with an earlier estimate of the collectivity from Coulomb-excitation yields and supports the interpretation of the 1414keV state as a two-phonon 7-vibrational excitation.

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Section: Analysis and Resultsmentioning

confidence: 99%

Lifetime of the two-phonon vibrational state in232Th

Körten

Bröcking

Hübel

et al. 1995

Z. Physik A - Hadrons and Nuclei

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“…distance the excitation is exclusively caused by electromagnetic interaction. The transitions within the ground state and octupole band of Z32Th, as well as the interband transitions [6,7] arc observed. The low-energy 7 radiation for the transitions 4 + --*2 + and 2 + --,0 + in the ground state rotational band were absorbed in the detector shields or cut off by the thresholds of the constant fraction discriminators.…”

Section: Characteristic V Radiationmentioning

confidence: 98%

“…In earlier investigations [7,9] the ground state transition energies were assigned merely from energy and intensity systematics using particle-particle-7 data. The 7-7 coincidence matrix accumulated from our data verifies the cascade relationship from the 6 + ~ 4 + up to the proposed 26* ~ 24 + transition.…”

Section: Characteristic V Radiationmentioning

confidence: 99%

“…For the nucleus 232Th the influence of the nuclear interaction was determined by a comparison of the experimental v-ray intensities, measured as a function of the distance of closest approach, with the theoretical intensities calculated with a multiple Coulomb excitation program [7,9]. In a first step, excitation probabilities were calculated as a function of the center-of-mass scattering angle.…”

Section: Comparison With Theoretical Cross Sectionsmentioning

confidence: 99%

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Inelastic scattering and nucleon transfer in the system232Th+206Pb near the Coulomb barrier

Eckert

Stelzer

Nelson

et al. 1992

Z. Physik A - Hadrons and Nuclei

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Nucleon transfer accompanied by Coulomb excitation was studied in the system 2~ at EL~b=6.4 MeV/u. Particle-particle-gamma coincidence techniques were used to identify excited states of reaction products populated through inelastic scattering and nucleon transfer reactions. The mean excitation energy was measured by means of a y-ray energy and multiplicity filter consisting of 6 NaI detectors. Large cross sections for one-neutron and two-neutron pick-up from 232Th are observed. The impact-parameter dependence of the neutron transfer is analyzed in terms of semiclassical barrier penetration models. Using realistic neutron potentials with a diffuse surface, the experimental data are in accordance with the assumption of a "cold" transfer to states near the yrast line.

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“…[40], [44], [45], [46]. This suggests that discrete states with spins higher than 30h could be populated in one-neutron transfer reactions using P b projectiles.…”

Section: Chaptermentioning

confidence: 99%

In-beam studies of high-spin states of actinide nuclei

Stoyer

1990

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High-spin states in the actinides have been studied using Coulomb-excitation, inelastic excitation reactions, and one-neutron transfer reactions. Experimental data are presented for states in 232U, 233U 7 -234U 7 235U, 2 3 8 P~ and 2 3 9 P~ from a variety of reactions. Energy levels, moments-of-inertia, aligned angular momentum, Routhians, gamma-ray intensities, and cross-sections are presented MI for most cases. Additional spectroscopic information (magnetic moments, mixing ratios, and g-factors) is presented for 233U. One-and two-neutron transfer reaction mechanisms and the possibility of band crossings (backbending) are discussed. A discussion of odd-A band fitting and Cranking calculations is presented to aid in the interpretation of rotational energy levels and alignment. In addition, several theoretical calculations of rotational populations for inelastic excitation and neutron transfer are compared to the data. Intratheory comparisons between the Sudden Approximation, Semi-Classical, and Alder-Winther-DeBoer methods are made. In connection with the theory development, the possible signature for the nuclear SQUID effect is discussed. DedicationThis thesis would have been impossible without the support of the following people:(1) To all those many people I've had the fortune of interacting with during my learningexperiences while performing this and related work-too many to acknowledge individually, but certainly not forgotten.(2) To Dr. Richard A. Meyer who welcomed me to my first job in Nuclear Chemistry, pointed me in the right direction at Berkeley, and whom I consider a good friend.(3) To my brother, Dale, who first provoked in me the curiousity of a scientist; to my new sister-in-law, Janice, whose only connection with this thesis was a concern that I not recite it at her wedding; and to my parents, Lyn and Dorothy, who, though it is probably still somewhat of a mystery to them, nevertheless gave me the support and encouragement to "do whatever it is I do".(4) And lastly, to Dr. John Rasmussen, whom it has been an honor to work for during my graduate studies. His patience, kindness, creativity, and guidance have been generous during my stay at LBL, and I am eternally in his debt. Acknowledgements

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Structure of high-spin states in 232Th, 234U and 236U

Cited by 77 publications

References 23 publications

Lifetime of the two-phonon vibrational state in232Th

Lifetime of the two-phonon vibrational state in232Th

Inelastic scattering and nucleon transfer in the system232Th+206Pb near the Coulomb barrier

In-beam studies of high-spin states of actinide nuclei

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