First Measurement of Several<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>β</mml:mi></mml:math>-Delayed Neutron Emitting Isotopes Beyond<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>N</mml:mi><mml:mo>=</mml:mo><mml:mn>126</mml:mn></mml:mrow></mml:math>

Caballero-Folch, R.; Domingo‐Pardo, C.; Agramunt, J.; Algora, A.; Ameil, F.; Arcones, Almudena; Ayyad, Y.; Benlliure, J.; Borzov, I. N.; Bowry, M.; Calviño, F.; Cano‐Ott, D.; Cortés, G.; Davinson, T.; Dillmann, I.; Estradé, A.; Evdokimov, A.; Faestermann, T.; Farinon, F.; Galaviz, D.; García, A. R.; Geißel, H.; Gelletly, W.; Gernhäuser, R.; Gómez-Hornillos, M.B.; Guerrero, C.; Heil, M.; Hinke, C.; Knöbel, R.; Kojouharov, I.; Kurcewicz, J.; Kurz, N.; Litvinov, Yu. A.; Maier, L.; Marganiec, J.; Marketin, Tomislav; Marta, M.; Martínez, T.; Martı́nez-Pinedo, G.; Montes, F.; Mukha, I.; Napoli, D. R.; Nociforo, C.; Paradela, C.; Piétri, S.; Podolyák, Zs.; Procházka, A.; Rice, S.; Riego, A.; Rubio, B.; Schaffner, H.; Scheidenberger, C.; Smith, K.; Sokol, E. A.; Steiger, Katja; Sun, B.; Taín, J. L.; Takechi, M.; Testov, D.; Weick, H.; Wilson, E.; Winfield, J. S.; Wood, Richard Thomas; Woods, P. J.; Yeremin, A. V.

doi:10.1103/physrevlett.117.012501

Cited by 60 publications

(62 citation statements)

References 69 publications

(109 reference statements)

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“…Beta-delayed neutrion emission is particularly important for the freezeout of the r-process. Recently, beta-delayed neutron emission probabilities of neutron rich Hg and Tl nuclei have been measured (Caballero-Folch et al 2016) together with beta-decay half-lives for 20 isotopes of Au, Hg, Tl, Pb, and Bi in the region of neutron number N ≥ 126. These are the heaviest nuclear species for which neutron emission has been observed.…”

Section: Beta-delayed Neutron Emissionmentioning

confidence: 99%

Impact of new data for neutron-rich heavy nuclei on theoretical models forr-process nucleosynthesis

Kajino

Mathews

2017

Rep. Prog. Phys.

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Current models for the r process are summarized with an emphasis on the key constraints from both nuclear physics measurements and astronomical observations. In particular, we analyze the importance of nuclear physics input such as beta-decay rates; nuclear masses; neutron-capture cross sections; beta-delayed neutron emission; probability of spontaneous fission, beta-and neutron-induced fission, fission fragment mass distributions; neutrino-induced reaction cross sections, etc. We highlight the effects on models for r-process nucleosynthesis of newly measured β-decay half-lives, masses, and spectroscopy of neutron-rich nuclei near the r-process path. We overview r-process nucleosynthesis in the neutrino driven wind above the proto-neutron star in core collapse supernovae along with the possibility of magneto-hydrodynamic jets from rotating supernova explosion models. We also consider the possibility of neutron star mergers as an r-process environment. A key outcome of newly measured nuclear properties far from stability is the degree of shell quenching for neutron rich isotopes near the closed neutron shells. This leads to important constraints on the sites for r-process nucleosynthesis in which freezeout occurs on a rapid timescale.

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Section: Beta-delayed Neutron Emissionmentioning

confidence: 99%

Impact of new data for neutron-rich heavy nuclei on theoretical models forr-process nucleosynthesis

Kajino

Mathews

2017

Rep. Prog. Phys.

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“…These calculations are timely because the mass region addressed is at the borderline of present experimental capabilities for measuring half-lives and β-delayed neutrons. There is increasing experimental activity focused to extend our knowledge about the decay properties of neutron-rich nuclei in different mass regions [2,13,[41][42][43][44][45][46][47]. See also Ref.…”

Section: Introductionmentioning

confidence: 99%

β -decay properties of neutron-rich Ca, Ti, and Cr isotopes

2018

Self Cite

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β-decay properties of neutron-rich Ca, Ti, and Cr isotopes are studied within a deformed protonneutron quasiparticle random-phase approximation. The underlying mean field is described selfconsistently from deformed Skyrme Hartree-Fock calculations with pairing correlations. Residual spin-isospin interactions in the particle-hole and particle-particle channels are also included in the formalism. The energy distributions of the Gamow-Teller strength, the β-decay feedings, the β-decay half-lives, and the β-delayed neutron emission probabilities are discussed and compared with other theoretical results, as well as with the available experimental information. The evolution of these nuclear β-decay properties is investigated in isotopic chains in a search for structural changes. A reliable estimate of the β-decay properties in this mass region is a valuable information for evaluating decay rates in astrophysical scenarios.

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“…Our recent article [44] elaborates on our current understanding of the reaction mechanism and our ability to describe it quantitatively with the phenomenological DIT (deep inelastic transfer) model, as well as with the microscopic CoMD (Constrained Molecular Dynamics) model. As already pointed out in our previous works, our multinucleon transfer approach in the energy regime of [15][16][17][18][19][20][21][22][23][24][25] MeV/nucleon offers the possibility of essentially adding neutrons (along with the usual stripping of protons) to a given stable (or radioactive) projectile via interaction with a neutron-rich target.…”

Section: Introductionmentioning

confidence: 99%

Neutron-rich rare isotope production with stable and radioactive beams in the mass range A ∼ 40–60 at beam energy around 15 MeV/nucleon

Papageorgiou¹,

Souliotis²,

Tshoo³

et al. 2018

J. Phys. G: Nucl. Part. Phys.

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We studied the production of neutron-rich nuclides in multinucleon transfer collisions of stable and radioactive beams in the mass range A∼40-60. We first presented our experimental cross section data of projectile fragments from the reaction of 40 Ar(15 MeV/nucleon) with 64 Ni, 58 Ni and 27 Al. We then compared them with calculations based on either the deep-inelastic transfer (DIT) model or the constrained molecular dynamics (CoMD) model, followed by the statistical multifragmentation model (SMM). An overall good agreement of the calculations with the experimental data is obtained. We continued with calculations of the reaction of 40 Ar (15 MeV/nucleon) with 238 U target and then with reactions of 48 Ca (15 MeV/nucleon) with 64 Ni and 238 U targets. In these reactions, neutron-rich rare isotopes with large cross sections are produced. These nuclides, in turn, can be assumed to form radioactive beams and interact with a subsequent target (preferably 238 U), leading to the production of extremely neutron-rich and even new isotopes (e.g. 60 Ca) in this mass range. We conclude that multinucleon transfer reactions with stable or radioactive beams at the energy of around 15 MeV/nucleon offer an effective route to access extremely neutron-rich rare isotopes for nuclear structure or reaction studies.

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First Measurement of Severalβ-Delayed Neutron Emitting Isotopes BeyondN=126

Cited by 60 publications

References 69 publications

Impact of new data for neutron-rich heavy nuclei on theoretical models forr-process nucleosynthesis

Impact of new data for neutron-rich heavy nuclei on theoretical models forr-process nucleosynthesis

β -decay properties of neutron-rich Ca, Ti, and Cr isotopes

Neutron-rich rare isotope production with stable and radioactive beams in the mass range A ∼ 40–60 at beam energy around 15 MeV/nucleon

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