Role of transitional levels in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Np</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>237</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>(<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>γ</mml:mi><mml:mo>,</mml:mo><mml:mi>f</mml:mi></mml:mrow></mml:math>): Perspectives for studying highly deformed systems

Arruda‐Neto, J. D. T.; Mesa, J.; Garcı́a, F.; Rodriguez, Oscar Maurício Hernandez; Geraldo, L.P.; García, C.; Rodrigues, T. E.; Shtejer, K.; Semmler, R.; Guzmán, F.

doi:10.1103/physrevc.74.034324

Cited by 6 publications

(2 citation statements)

References 27 publications

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“…Following Bohr's concept, the near-barrier fission proceeds through these discrete transition states. The direct observation of such states is difficult and could so far only be concluded in a few cases of (n,f) and (γ ,f) experiments [39] through the observation of characteristic fission fragment angular distributions. However, the rotational behavior of such states has not been unambiguously observed so far, while we identified for the first time such candidates in an odd-odd nucleus.…”

Section: On the Fission Barrier Of 238 Npmentioning

confidence: 99%

Fission resonances observed in the $$^{237}$$Np(d,pf) reaction and the fission barrier topology of $$^{238}$$Np

et al. 2022

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The fission probability of $$^{238}$$ 238 Np was measured as a function of the excitation energy in the energy range of E$$^* = 5.4 - 6.2$$ ∗ = 5.4 - 6.2 MeV in order to search for transmission fission resonances. A radioactive $$^{237}$$ 237 Np target was bombarded with deuterons of E$$_d$$ d = 12 MeV, whereas the energy of the protons was analyzed with a superior resolution of $$\varDelta $$ Δ E = 8 keV. The experiment was performed at the Tandem accelerator of the Maier-Leibnitz Laboratory in Garching employing the $$^{237}$$ 237 Np(d,pf) reaction. A group of fission resonances has been observed at excitation energies between E$$^* = 5.5 - 5.8$$ ∗ = 5.5 - 5.8 MeV, which could be ordered into three (superdeformed) rotational bands with a rotational parameter of $$\hbar ^2/2\varTheta = 3.507$$ ħ 2 / 2 Θ = 3.507 keV, and identified as the first direct observation of transition states composing rotational bands in an odd-odd nucleus as they appear above the top of the outer fission barrier. Nuclear reaction code (talys1.95) calculations were also performed to extract the multi-humped fission barrier parameters of $$^{238}$$ 238 Np by fitting them to the experimental data of the present (d,pf) and previous (n,f) experiments. The extracted barrier parameters also support the above interpretation of the observed resonances.

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Section: On the Fission Barrier Of 238 Npmentioning

confidence: 99%

Fission resonances observed in the $$^{237}$$Np(d,pf) reaction and the fission barrier topology of $$^{238}$$Np

et al. 2022

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show abstract

“…The results obtained were published in journals of international renown. 83,84,85,86,87,88,89,90,91,92,93 When it comes to applied and experimental nuclear physics, projects associated with the development of nuclear methods of analysis, which are used in applications in the areas of medical physics, geological prospecting, agriculture, industry, radiological protection, dosimetry and the environment, continued to be pursued. They were also used to model and simulate nuclear and radioactive processes, and to collect nuclear data for nuclear techniques, among others.…”

Section: Development Of the Second Stagementioning

confidence: 99%