Untersuchung der Anregungen von186Re nach der (n, ?)-Reaktion

Glatz, J.F.C.

doi:10.1007/bf01391609

Cited by 15 publications

(14 citation statements)

References 18 publications

(19 reference statements)

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“…Of the primary transitions identified in this way, 50 were not previously reported in the evaluated literature (Refs. [57][58][59][60]). Of these 50 new primary transitions, 35 feed levels in the adopted level scheme for 186 Re [10].…”

Section: Resultsmentioning

confidence: 99%

“…The multipolarity of this transition was determined from conversionelectron spectrometry by Lanier et al [58]. Glatz [59] determined the 351.3-keV level to be the K π = (3) + band head, and placed the J π = (4) + , 500.7-keV and J π = (5) + , 665.2-keV levels in the rotational band according to γ − γ coincidences from (n, γ) reactions on 185 Re. In this work, agreement in the P-D plot for the 351.3-keV level is significantly improved when the spin is increased to J = 4, as illustrated in Fig.…”

Section: Discrete-level Spin-parity Assignmentsmentioning

confidence: 99%

“…In the adopted level scheme for 186 Re, there are no transitions out of this level to lower-lying levels [10], although a ∼12-keV E2 transition to the J π = 4 − , 174.1-keV level and a ∼38-keV M 2 transition to the 148.2-keV isomer have been proposed in the literature (Refs. [58], [57], and [59]). Both transitions would be highly converted (α = 7.1 × 10 4 for the ∼12-keV transition and α = 1.0 × 10 3 for the ∼38-keV transition), and their energies would be sufficiently low that they would not be observable in the prompt 185 Re(n, γ) spectrum of this work.…”

Section: Isomer Feeding Multipole Mixing and Branching Ratiosmentioning

confidence: 99%

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Investigation ofRe186via radiative thermal-neutron capture onRe185

et al. 2016

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Partial γ-ray production cross sections and the total radiative thermal-neutron capture cross section for the 185 Re(n, γ) 186 Re reaction were measured using the Prompt Gamma Activation Analysis facility at the Budapest Research Reactor with an enriched 185 Re target. The 186 Re cross sections were standardized using well-known 35 Cl(n, γ) 36 Cl cross sections from irradiation of a stoichiometric nat ReCl3 target. The resulting cross sections for transitions feeding the 186 Re ground state from low-lying levels below a cutoff energy of Ec = 746 keV were combined with a modeled probability of ground-state feeding from levels above Ec to arrive at a total cross section of σ0 = 111(6) b for radiative thermal-neutron capture on 185 Re. A comparison of modeled discrete-level populations with measured transition intensities led to proposed revisions for seven tentative spin-parity assignments in the adopted level scheme for 186 Re. Additionally, 102 primary γ-rays were measured, including 50 previously unknown. A neutron-separation energy of Sn = 6179.59(5) keV was determined from a global least-squares fit of the measured γ-ray energies to the known 186 Re decay scheme. The total capture cross section and separation energy results are comparable to earlier measurements of these values.

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Section: Resultsmentioning

confidence: 99%

Section: Discrete-level Spin-parity Assignmentsmentioning

confidence: 99%

Section: Isomer Feeding Multipole Mixing and Branching Ratiosmentioning

confidence: 99%

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Investigation ofRe186via radiative thermal-neutron capture onRe185

et al. 2016

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“…The 179.7 keV level should decay with a ∼5.8 keV E2 transition to the 173.9 4 − bandhead which can be confirmed by γγ-coincidences. New populating and depopulating transitions have been assigned to the ∼330, ∼471, and ∼562 keV levels [6] proposed on the basis of γγ-coincidence measurements in [3]. The assigned linking transitions (see figure 1) allowed to determine the energies of these levels more precisely and confirm their spin-parity assignments.…”

Section: Experimental Methods and Resultsmentioning

confidence: 96%

“…Previous thermal neutron capture studies of the 186 Re levels have been carried out more than 40 years ago [2,3] resulting in the development of model-interpreted level scheme up to about 1 MeV. Important data about depopulation of high spin levels have been obtained in the decay study [4] of the long-lived (2 × 10 5 years) isomer of 186 Re.…”

Section: Introductionmentioning

confidence: 99%

Levels of¹⁸⁶Re populated in thermal neutron capture reaction

Bērziņš

Krasta

Simonova

et al. 2015

EPJ Web of Conferences

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Abstract. Levels of 186 Re have been studied in the thermal neutron capture reaction with an enriched 185 Re target. Evaluation of spectrum measured with GAMS5 allowed to obtain energies and intensities of more than 500 γ-lines assigned to 186 Re. Most of the obtained transitions have been placed in the model-independent level scheme of the doubly odd 186 Re nucleus, taking into account the available data of earlier experiments as well as the results of recent 187 Re(p, d) 186 Re reaction measurements. Structure of the 186 Re low-lying levels has been analysed in terms of the particle-plus-rotor coupling model.

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