Future of nuclear fission theory

Bender, M.; Bernard, R.; Bertsch, G. F.; Chiba, Satoshi; Dobaczewski, J.; Dubray, N.; Giuliani, Samuel A.; Hagino, K.; Lacroix, Denis; Li, Zhipan; Magierski, Piotr; Maruhn, J. A.; Nazarewicz, W.; Pei, Jian; Péru, S.; Pillet, N.; Randrup, J.; Regnier, David; Reinhard, P.‐G.; Robledo, L. M.; Ryssens, Wouter; Sadhukhan, Jhilam; Scamps, Guillaume; Schunck, N.; Simenel, C.; Skalski, Janusz; Stetcu, Ionel; Stevenson, P. D.; Umar, A. S.; Verrière, Marc; Vretenar, Dario; Warda, M.; Åberg, Sven

doi:10.1088/1361-6471/abab4f

Cited by 162 publications

(74 citation statements)

References 329 publications

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“…The topic of fission is covered in a review by Bulgac et al, giving an historical overview of methods used to tackle fission, details of the current state of the art, and a plan for the future. Fission is very much a current focus of time-dependent methods, and the review by Bulgac et al complements a substantial review published recently elsewhere [6]. A method for describing spontaneous fission from a microscopic approach is given in a review by Sadhukhan.…”

Section: Editorial On the Research Topic Advances In Time-dependent Mmentioning

confidence: 99%

Editorial: Advances in Time-Dependent Methods for Nuclear Structure and Dynamics

Guo¹,

Lacroix²,

Schunck³

et al. 2021

Front. Phys.

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Section: Editorial On the Research Topic Advances In Time-dependent Mmentioning

confidence: 99%

Editorial: Advances in Time-Dependent Methods for Nuclear Structure and Dynamics

Guo¹,

Lacroix²,

Schunck³

et al. 2021

Front. Phys.

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“…The mean-field equations (11,12) and gap equations (10) together constitute the self-consistent HFB equations in the canonical basis. In (12a) Ĥα is a state-dependent one-body Hamiltonian composed of the HF Hamiltonian and the pairing potential.…”

Section: The Hfb Theory In Canonical Basismentioning

confidence: 99%

“…Over the years, a number of HFB solvers have been developed; see Table 2 of Ref. [11] for a summary. These solvers can be divided into two families.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional Skyrme Hartree-Fock-Bogoliubov solver in coordinate-space representation

Chen,

Li,

Schuetrumpf

et al. 2021

Preprint

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The coordinate-space representation of the Hartree-Fock-Bogoliubov theory is the method of choice to study weakly bound nuclei whose properties are affected by the quasiparticle continuum space. To describe such systems, we developed a three-dimensional Skyrme-Hartree-Fock-Bogoliubov solver HFBFFT based on the existing, highly optimized and parallelized Skyrme-Hartree-Fock code Sky3D. The code does not impose any self-consistent spatial symmetries such as mirror inversions or parity. The underlying equations are solved in HFBFFT directly in the canonical basis using the fast Fourier transform. To remedy the problems with pairing collapse, we implemented the soft energy cutoff and pairing annealing. The convergence of HFB solutions was improved by a sub-iteration method. The Hermiticity violation of differential operators brought by Fourier-transform-based differentiation has also been solved. The accuracy and performance of HFBFFT were tested by benchmarking it against other HFB codes, both spherical and deformed, for a set of nuclei, both well-bound and weakly-bound.

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“…Nuclear fission plays an indispensable role in the nuclear engineering, while the microscopic and quantum understanding of fission dynamics is still an open problem (for the recent developments in the relevant microscopic approaches, see [1][2][3][4][5]). Energy dissipation contributes substantially to the fission dynamics, as the timescale of pre-scission neutron emission is similar to that of microscopic dissipation with its time scale ∼ 10 −20 to 10 −21 s, where the time-scale of each reaction dynamics is an important ingredient of heavy-ion collisions including nuclear fission dynamics (see [6] for a recent microscopic work, and see [7] for a gross view).…”

Section: Introductionmentioning

confidence: 99%

Inertial energy dissipation in nuclear dynamics

Iwata,

Nishikawa

2021

Preprint

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We present the TDDFT+Langevin model that incorporates microscopic time-dependent density function theory (TDDFT) with macroscopic Langevin model. By extracting the energy-dependent dissipation effect from the TDDFT dynamics, quantum effects are introduced to the Langevin-type stochastic fission analysis. In this paper, by means of Skyrme nuclear effective interactions, the energy-dependent friction coefficients to be used in Langevin calculations are provided individually for 25 fission nuclei chosen from uranium, plutonium, curium, californium, and fermium isotopes. The validity of the energy-dependent friction coefficients are confirmed by comparing to the existing experimental fission fragment yields. In conclusion, depending on the energy, the transition of energy dissipation mechanism from conventional viscous energy dissipation to inertial energy dissipation is shown.

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Future of nuclear fission theory

Cited by 162 publications

References 329 publications

Editorial: Advances in Time-Dependent Methods for Nuclear Structure and Dynamics

Editorial: Advances in Time-Dependent Methods for Nuclear Structure and Dynamics

Three-dimensional Skyrme Hartree-Fock-Bogoliubov solver in coordinate-space representation

Inertial energy dissipation in nuclear dynamics

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