Isospin effects in nuclear fragmentation of isotopic, isobaric, and isotonic reactions

Bansal, Preeti; Gautam, Sakshi; Puri, Rajeev K.

doi:10.1103/physrevc.98.024604

Cited by 8 publications

(5 citation statements)

References 45 publications

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“…Similar ideas have been pursued in Refs. (262)(263)(264), and by the Oak Ridge group (265,266). This type of approach is appealing because it is formulated in the harmonic oscialltor basis and so yields an interaction well-suited to a number of popular many-body methods.…”

Section: Eft For the Shell Modelmentioning

confidence: 99%

Nonempirical Interactions for the Nuclear Shell Model: An Update

Stroberg

Bogner

Hergert

et al. 2019

Annu. Rev. Nucl. Part. Sci.

208

216

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The nuclear shell model has been perhaps the most important conceptual and computational paradigm for the understanding of the structure of atomic nuclei. While the shell model has been predominantly used in a phenomenological context, there have been efforts stretching back over a half century to derive shell model parameters based on a realistic interaction between nucleons. More recently, several ab initio many-body methods-in particular many-body perturbation theory, the no-core shell model, the in-medium similarity renormalization group, and coupled cluster theory-have developed the capability to provide effective shell model Hamiltonians. We provide an update on

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Section: Eft For the Shell Modelmentioning

confidence: 99%

Nonempirical Interactions for the Nuclear Shell Model: An Update

Stroberg

Bogner

Hergert

et al. 2019

Annu. Rev. Nucl. Part. Sci.

208

216

View full text Add to dashboard Cite

show abstract

“…While pionless EFT has been used successfully in low-energy nuclear physics, see, e.g., Reference (24), typical momenta in nuclear many-body systems are of the order of mπ, and therefore larger than its breakdown scale. Chiral EFT is based on the observation that pions naturally emerge as pseudo Goldstone bosons associated with the spontaneous breaking of the approximate chiral symmetry of QCD.…”

Section: Nuclear Interactionsmentioning

confidence: 99%

Quantum Monte Carlo Methods in Nuclear Physics: Recent Advances

Lynn

Tews

Gandolfi

et al. 2019

Annu. Rev. Nucl. Part. Sci.

103

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Keywords many-body methods, nuclear interactions, chiral effective field theory, quantum Monte Carlo methods, light and medium-mass nuclei, electroweak properties of nuclei AbstractIn recent years, the combination of precise quantum Monte Carlo (QMC) methods with realistic nuclear interactions and consistent electroweak currents, in particular those constructed within effective field theories (EFTs), has lead to new insights in light and medium-mass nuclei, neutron matter, and electroweak reactions. This compelling new body of work has been made possible both by advances in QMC methods for nuclear physics, which push the bounds of applicability to heavier nuclei and to asymmetric nuclear matter and by the development of local chiral EFT interactions up to next-to-next-to-leading order and minimally nonlocal interactions including ∆ degrees of freedom. In this review, we discuss these recent developments and give an overview of the exciting results for nuclei, neutron matter and neutron stars, and electroweak reactions. arXiv:1901.04868v1 [nucl-th] 15 Jan 2019 QMC: quantum Monte Carlo GFMC: Green's function Monte Carlo AFDMC: auxiliary field diffusion Monte Carloprocesses of nuclei with A ≤ 12, where A is the number of nucleons, with a percent-level accuracy. Because it sums over all spin/isospin states, the GFMC scales exponentially with A, which presently prevents its applicability to A > 12 nuclei. The AFDMC method, on the other hand, uses Hubbard-Stratonovich transformations to sample the spin/isospin degrees of freedom and achieve a polynomial scaling in A. This has enabled the computation of systems with larger A, such as 16 O and neutron matter, at the cost of using somewhat simplified wave functions.In this review, we present state-of-the-art QMC results for nuclei up to 16 O and neutron matter using nuclear EFT interactions, and electroweak processes using realistic phenomenological potentials, and discuss future directions. The review is structured as follows.In Section 2 we discuss nuclear interactions: Starting with phenomenological ones for context and moving to those based on chiral EFT. In Section 3 we briefly discuss electroweak currents. In Section 4 we introduce the GFMC and AFDMC methods for nuclear physics. In Sections 5 to 7 we present recent results for light and medium-mass nuclei, neutron matter and neutron stars, as well as for electroweak reactions. www.annualreviews.org • Quantum Monte Carlo Methods in Nuclear Physics: Recent Advances 3 6 Lynn et al.

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“…Rajeev Puri joined the group in late 2000 to develop the SACA algorithm for fragment identification [340][341][342]. Returning to the Panjab University, Chandigarh he continued to work on the onset of flow [343], on multifragmentation [344][345][346][347], and the influence of isospin asymmetry [348][349][350][351] using IQMD, together with Sakshi Gautam and Rohit Kumar.…”

Section: Code Historymentioning

confidence: 99%

Transport Model Comparison Studies of Intermediate-Energy Heavy-Ion Collisions

Wolter,

Colonna,

Cozma

et al. 2022

Preprint

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Transport models are the main method to obtain physics information on the nuclear equation of state and in-medium properties of particles from low to relativistic-energy heavy-ion collisions. The Transport Model Evaluation Project (TMEP) has been pursued to test the robustness of transport model predictions in reaching consistent conclusions from the same type of physical model. To this end, calculations under controlled conditions of physical input and set-up were performed with various participating codes. These included both calculations of nuclear matter in a box with periodic boundary conditions, which test separately selected ingredients of a transport code, and more realistic calculations of heavy-ion collisions. Over the years, five studies have been performed within this project. In this intermediate review, we summarize and discuss the present status of the project. We also provide condensed descriptions of the 26 participating codes, which contributed to some part of the project. These include the major codes in use today. After a compact description of the underlying transport approaches, we review the main results of the studies completed so far. They show, that in box calculations the differences between the codes can be well understood and a convergence of the results can be reached. These studies also highlight the systematic differences between the two families of transport codes, known under the names of Boltzmann-Uehling-Uhlenbeck (BUU) and Quantum Molecular Dynamics (QMD) type codes. However, when the codes were compared in full heavy-ion collisions using different physical models, as recently for pion production, they still yielded substantially different results. This calls for further comparisons of heavy-ion collisions with controlled models and of box comparisons of important ingredients, like momentum-dependent fields, which are currently underway. Our evaluation studies often indicate improved strategies in performing transport simulations and thus can provide guidance to code developers. Results of transport simulations of heavy-ion collisions from a given code will have more significance if the code can be validated against benchmark calculations such as the ones summarized in this review.

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Isospin effects in nuclear fragmentation of isotopic, isobaric, and isotonic reactions

Cited by 8 publications

References 45 publications

Nonempirical Interactions for the Nuclear Shell Model: An Update

Nonempirical Interactions for the Nuclear Shell Model: An Update

Quantum Monte Carlo Methods in Nuclear Physics: Recent Advances

Transport Model Comparison Studies of Intermediate-Energy Heavy-Ion Collisions

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