Determination of the 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mmultiscripts><mml:mi>Mg</mml:mi><mml:mprescripts /><mml:none /><mml:mn>36</mml:mn></mml:mmultiscripts><mml:mo>(</mml:mo><mml:mi>n</mml:mi><mml:mo>,</mml:mo><mml:mi>γ</mml:mi><mml:mo>)</mml:mo><mml:mmultiscripts><mml:mi>Mg</mml:mi><mml:mprescripts /><mml:none /><mml:mn>37</mml:mn></mml:mmultiscripts></mml:mrow></mml:math>
 reaction rate from Coulomb dissociation of 
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Shubhchintak,; Chatterjee, Rajdeep Mohan; Shyam, Radhey

doi:10.1103/physrevc.96.025804

Cited by 13 publications

(8 citation statements)

References 33 publications

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“…Indeed, we have verified this point in the present case as it was done in Ref. [33], and found that the deformed wave function is not very different from the spherical one for β 2 up to 0.5.…”

Section: Resultssupporting

confidence: 90%

Exploring the structure of $^{29}$Ne

Dan,

Singh,

Singh

et al. 2021

Preprint

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We apply a fully quantum mechanical Coulomb breakup theory under the aegis of post form finite-range distorted wave Born approximation to analyze the elastic Coulomb breakup of 29 Ne on 208 Pb at 244 MeV/u. We calculate several reaction observables to quantify its structural parameters. One-neutron removal cross section is calculated to check the consistency of the ground state configuration of 29 Ne with the available experimental data. A scrutiny of the parallel momentum distribution of the charged fragment reveals a full width at half maximum of 82 MeV/c, which is in good agreement with the experimental value and indicates a moderate halo for a nearly spherical 29 Ne in the 28 Ne(0 + ) ⊗ 2p 3/2 ν ground state. The energy-angular distributions and average momentum of the charged fragment point to the absence of post-acceleration effects in the breakup process, a desirable result for elastic breakup.

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Section: Resultssupporting

confidence: 90%

Exploring the structure of $^{29}$Ne

Dan,

Singh,

Singh

et al. 2021

Preprint

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“…Finally, let us remark that a large surface diffuseness in neutron rich Ne and Mg could have consequences in determining the abundance of these nuclei in explosive nucleosynthsis. In fact, properly accounting for the structure of these exotic medium mass isotopes is a prerequisite in subsequently determining the r-process path in neutron star mergers and in the post-collapse phase of a type II or type Ib supernova [46,47].…”

Section: Discussionmentioning

confidence: 99%

Enormous nuclear surface diffuseness in the exotic Ne and Mg isotopes

Choudhary¹,

Horiuchi²,

Kimura³

et al. 2021

Preprint

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Background: The density profile of exotic nuclei can be a rich source of information on the nuclear surface. In particular, the nuclear surface diffuseness parameter is correlated with the occupation probability of nucleons in distinct nuclear orbits, especially those with low angular momenta.Purpose: The aim of this paper is to investigate the relationship between the nuclear surface diffuseness and spectroscopic information of neutron rich Ne and Mg isotopes both at the cusp and inside the island of inversion.Method: We use the microscopic antisymmetrized molecular dynamics model to calculate the densities and other spectroscopic information related to Ne and Mg isotopes. A two-parameter Fermi density distribution is then used to define the diffuseness parameter and the matter radius. These quantities are extracted by minimizing the difference between these two densities. To relate them with observables, the two densities are given as inputs to a Glauber model calculation of nucleon-nucleus elastic scattering differential cross section, with the demand that they reproduce the first peak position and its magnitude.Results: A marked increase in the occupation of neutrons in the pf -orbit is noted in Ne and Mg isotopes from N = 19 onwards. We observed that the nuclear diffuseness is strongly correlated with the nuclear deformation, in the island of inversion, and gradually increases with the occupation of neutrons in the 1p 3/2 orbit. This result is also confirmed by a single-particle estimate of the valence neutron density distribution, with 29 Ne as a test case. An exception is noted for 35−37 Mg, where the filling up of the holes in the sd-shell partially compensates the increase in diffuseness due to filling up of the 1p 3/2 orbit. Conclusion:Information on nuclear density profile of neutron rich medium mass nuclei can be reliably extracted by studying the first diffraction peak of the nucleon-nucleus elastic scattering differential cross section. The enormous surface diffuseness of Ne and Mg isotopes, in the island of inversion, could be attributed to the increasing neutron occupation of the 1p 3/2 orbit.

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“…The ability to include core deformation is an important generalization that makes the method applicable to isotopes in the r-process path. Two more recent applications of this method are relevant to an alternative path to seed the r-process: the first for the calculation of the 34 Na Coulomb dissociation on Pb at 100 AMeV to extract 33 Na(n, γ ) 34 Na (67) and the second for the calculation of the 38 Mg Coulomb dissociation on Pb at 244 AMeV to extract 37 Mg(n, γ ) 38 Mg (68).…”

Section: The Coulomb Dissociation Methodsmentioning

confidence: 99%

Nuclear Reactions in Astrophysics: A Review of Useful Probes for Extracting Reaction Rates

Nunes

Potel

Poxon-Pearson

et al. 2020

Annu. Rev. Nucl. Part. Sci.

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Astrophysical simulations require knowledge of a wide array of reaction rates. For a number of reasons, many of these reaction rates cannot be measured directly and instead are probed with indirect nuclear reactions. We review the current state of the art regarding the techniques used to extract reaction information that is relevant to describe stars, including their explosions and collisions. We focus on the theoretical developments over the last decade that have had an impact on the connection between the laboratory indirect measurement and the astrophysical desired reaction. This review includes three major probes that have been, and will continue to be, widely used in our community: transfer reactions, breakup reactions, and charge-exchange reactions. Expected final online publication date for the Annual Review of Nuclear and Particle Science, Volume 70 is October 19, 2020. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

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Determination of the Mg36(n,γ)Mg37 reaction rate from Coulomb dissociation of
Shubhchintak Shubhchintak
¹
,
Rajdeep Mohan Chatterjee
²
,
Radhey Shyam
³

Cited by 13 publications

References 33 publications

Exploring the structure of $^{29}$Ne

Exploring the structure of $^{29}$Ne

Enormous nuclear surface diffuseness in the exotic Ne and Mg isotopes

Nuclear Reactions in Astrophysics: A Review of Useful Probes for Extracting Reaction Rates

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Determination of the Mg36(n,γ)Mg37 reaction rate from Coulomb dissociation of Shubhchintak Shubhchintak1, Rajdeep Mohan Chatterjee2, Radhey Shyam3

Cited by 13 publications

References 33 publications

Exploring the structure of $^{29}$Ne

Exploring the structure of $^{29}$Ne

Enormous nuclear surface diffuseness in the exotic Ne and Mg isotopes

Nuclear Reactions in Astrophysics: A Review of Useful Probes for Extracting Reaction Rates

Contact Info

Product

Resources

About

Determination of the Mg36(n,γ)Mg37 reaction rate from Coulomb dissociation of
Shubhchintak Shubhchintak
¹
,
Rajdeep Mohan Chatterjee
²
,
Radhey Shyam
³