Nuclear Data Sheets for A = 234

Browne, E.; Tuli, J.K.

doi:10.1016/j.nds.2007.02.003

Cited by 65 publications

(23 citation statements)

References 297 publications

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“…4., which histograms the double coincidences of protons and fission fragments (d,pf) and triple coincidences of protons, fission fragments and γ-rays (d,pfγ) as a function of E x . In the case of 234 U*, only a very few sub-threshold fission events occur below the inner fission barrier [25] at E x = 4.8 MeV, which is 2 MeV below the neutron separation energy at 6.85 MeV [32]. The 233 U(d,pf) reaction at 12.5 MeV incident energy populates compound nuclear excitation energies up to a maximum of 10 MeV in this case.…”

Section: Fig 3 (Color Online)mentioning

confidence: 81%

Energy dependence of the promptγ-ray emission from the(d,p)-induced fission ofU*
Rose
¹
,
Zeiser²,
Wilson³
et al. 2017
Phys. Rev. C
12
1
11
0
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Prompt fission γ-rays are responsible for approximately 5% of the total energy released in fission, and therefore important to understand when modelling nuclear reactors. In this work we present prompt γ-ray emission characteristics in fission, for the first time as a function of the nuclear excitation energy of the fissioning system. Emitted γ-ray spectra were measured, and γ-ray multiplicities and average and total γ energies per fission were determined for the 233 U(d,pf) reaction for excitation energies between 4.8 and 10 MeV, and for the 239 Pu(d,pf) reaction between 4.5 and 9 MeV. The spectral characteristics show no significant change as a function of excitation energy above the fission barrier, despite the fact that an extra ∼5 MeV of energy is potentially available in the excited fragments for γ-decay. The measured results are compared to model calculations made for prompt γ-ray emission with the fission model code GEF. Further comparison with previously obtained results from thermal neutron induced fission is made to characterize possible differences arising from using the surrogate (d,p) reaction. PACS numbers: 25.85.Ge 24.75.+i 07.85.Nc

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Section: Fig 3 (Color Online)mentioning

confidence: 81%

Energy dependence of the promptγ-ray emission from the(d,p)-induced fission ofU*
Rose
¹
,
Zeiser²,
Wilson³
et al. 2017
Phys. Rev. C
12
1
11
0
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“…The IBM Hamiltonian with the SU(3) Figure 1. Energy level of the SU(3) and the corresponding experimental data for 234 Th [11].…”

Section: Dynamical Symmetry and Symmetry Breakingmentioning

confidence: 99%

The study of structure in 224–234 thorium nuclei within the framework IBM

Lee

2017

EPJ Web Conf.

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Abstract. An investigation has been made of the behaviour of nuclear structure as a function of an increase in neutron number from 224 Th to 234 Th. Thorium of mass number 234 is a typical rotor nucleus that can be explained by the SU(3) limit of the interacting boson model(IBM) in the algebraic nuclear model. Furthermore, 224−232 Th lie on the path of the symmetry-breaking phase transition. Moreover, the nuclear structure of 224 Th can be explained using X(5) symmetry. However, as 226−230 Th nuclei are not fully symmetrical nuclei, they can be represented by adding a perturbed term to express symmetry breaking. Through the following three calculation steps, we identified the tendency of change in nuclear structure. Firstly, the structure of 232 Th is described using the matrix elements of the Hamiltonian and the electric quadrupole operator between basis states of the SU(3) limit in IBM. Secondly, the low-lying energy levels and E2 transition ratios corresponding to the observable physical values are calculated by adding a perturbed term with the first-order Casimir operator of the U(5) limit to the SU(3) Hamiltonian in IBM. We compared the results with experimental data of 224−234 Th. Lastly, the potential of the Bohr Hamiltonian is represented by a harmonic oscillator, as a result of which the structure of 224−234 Th could be expressed in closed form by an approximate separation of variables. The results of these theoretical predictions clarify nuclear structure changes in Thorium nuclei over mass numbers of practical significance.

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“…This isomer was later referred to as UX 2 , as it is in the chain of 238 U decay products. The spectra of the β and the γ radiation of 234 Th and its daughter 234 Pa have now been thoroughly studied [1][2][3][4][5][6]. Nevertheless, no reliable data on the energy of isomeric transition have been obtained so far.…”

Section: Introductionmentioning

confidence: 99%

An estimate of energy of isomeric transition in the decay of 234m Pa

Сергеев

2015

Bull. Russ. Acad. Sci. Phys.

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Nuclear Data Sheets for A = 234

Cited by 65 publications

References 297 publications

Energy dependence of the promptγ-ray emission from the(d,p)-induced fission ofU*
Rose
¹
,
Zeiser²,
Wilson³
et al. 2017
Phys. Rev. C
12
1
11
0
View full text Add to dashboard Cite

Energy dependence of the promptγ-ray emission from the(d,p)-induced fission ofU*
Rose
¹
,
Zeiser²,
Wilson³
et al. 2017
Phys. Rev. C
12
1
11
0
View full text Add to dashboard Cite

The study of structure in 224–234 thorium nuclei within the framework IBM

An estimate of energy of isomeric transition in the decay of 234m Pa

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Nuclear Data Sheets for A = 234

Cited by 65 publications

References 297 publications

Energy dependence of the promptγ-ray emission from the(d,p)-induced fission ofU*Rose1, Zeiser2, Wilson3 et al. 2017Phys. Rev. C121110View full textAdd to dashboardCite

Energy dependence of the promptγ-ray emission from the(d,p)-induced fission ofU*Rose1, Zeiser2, Wilson3 et al. 2017Phys. Rev. C121110View full textAdd to dashboardCite

The study of structure in 224–234 thorium nuclei within the framework IBM

An estimate of energy of isomeric transition in the decay of 234m Pa

Contact Info

Product

Resources

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Energy dependence of the promptγ-ray emission from the(d,p)-induced fission ofU*
Rose
¹
,
Zeiser²,
Wilson³
et al. 2017
Phys. Rev. C
12
1
11
0
View full text Add to dashboard Cite

Energy dependence of the promptγ-ray emission from the(d,p)-induced fission ofU*
Rose
¹
,
Zeiser²,
Wilson³
et al. 2017
Phys. Rev. C
12
1
11
0
View full text Add to dashboard Cite