Nuclear structure study of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">N</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>19</mml:mn><mml:mo>,</mml:mo><mml:mn>21</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>nuclei by<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>γ</mml:mi></mml:mrow></mml:math>spectroscopy

Elekes, Z.; Vajta, Zs.; Dombrádi, Zs.; Aiba, T.; Aoi, N.; Baba, H.; Bemmerer, D.; Fülöp, Zs.; Iwasa, N.; Kiss, Á.; Kobayashi, Toshio; Kondo, Y.; Motobayashi, T.; Nakabayashi, T.; Nannichi, T.; Sakuraï, H.; Sohler, D.; Takeuchi, Satoshi; Tanaka, K.; Togano, Y.; Yamada, Kazunari; Yamaguchi, Masashi; Yoneda, K.

doi:10.1103/physrevc.82.027305

Cited by 12 publications

(5 citation statements)

References 16 publications

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“…The calculated spin-parity of the ground states are 1/2 − and 2 − , respectively, in agreement with experimental data and shell-model calculations [42,43]. In-beam γ-ray spectroscopy experiments [44,45] have observed several excited states for both nuclei, although their spin-parities have not been firmly assigned. The ordering of the excited states of 19 N is in agreement with the shell model calculations [43].…”

Section: Resultssupporting

confidence: 79%

The $^{19}$N($n$,$γ)^{20}$N capture rate in light of the probable bubble nature of $^{20}$N

Choudhary¹,

Dan²,

Chatterjee³

et al. 2023

Preprint

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We aim to explore the bubble nature of the exotic nucleus 20 N within the microscopic antisymmetrized molecular dynamics (AMD) approach. Constraining its structural parameters, we analyse its static properties. Subsequently, we use the AMD infused finite-range distorted-wave Born approximation theory to calculate the Coulomb breakup of 20 N as an indirect approach to estimate the 19 N(n, γ) 20 N radiative capture rate.

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Section: Resultssupporting

confidence: 79%

The $^{19}$N($n$,$γ)^{20}$N capture rate in light of the probable bubble nature of $^{20}$N

Choudhary¹,

Dan²,

Chatterjee³

et al. 2023

Preprint

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“…and their important role in the big bang nucleosysnthesis [11]. For the nitrogen isotopes, many studies have focused on neutronrich isotopes with mass number ranging from A = 17 to A = 22 [12][13][14][15][16][17]. However, 23 N has rarely been investigated since its first production in 1998 [18,19].…”

Section: Introductionmentioning

confidence: 99%

Investigation ofN23in a three-body model

et al. 2015

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The neutron-drip-line nucleus 23 N is investigated in a three-body model consisting of a 21 N core and two valence neutrons. Using the Faddeev formalism with the realistic neutron-neutron potential and the neutron-core potential, we calculate the ground-state properties of 23 N including its twoneutron separation energy, and obtain good agreement with the experiments. We also find an excited 23 N state with a shallow two-neutron separation energy at about 0.18 MeV. By evaluating the root-mean-square matter radii, the average distances between the two valence neutrons, and the average distances from the core to the center-of-mass of the valence-neutron pair, we show that the excited state of 23 N has a distinct halo structure. Through calculating the correlation density distributions of the 23 N three-body system in configuration space, we find that the excited state of 23 N has a triangular shape, which is similar to but much more extended than the ground state.This scaling symmetry between the ground and excited states indicate the existence of an Efimov state in 23 N.

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“…In particular, we will show that the neutron-neutron monopole interaction can have significant effect on the evolution of N = 14 shell in carbon isotopes. The rapid decrease of the E(2 + 1 ) in N = 14 isotones indicates that the N = 14 shell gap existing in oxygen isotopes erodes in nitrogen and carbon isotopes [1,[10][11][12][13][14]. At N = 14, the B(E2) value measured through the lifetime of the 2 + 1 state in 20 C [15] is much larger than the values in 16,18 C [16,17] and 22 O [18] while an inelastic scattering measurement presents a much smaller B(E2) value in 20 C [19].…”

Section: Introductionmentioning

confidence: 99%

Shell evolution in neutron-rich carbon isotopes: Unexpected enhanced role of neutron–neutron correlation

Yuan

Fang

2012

Nuclear Physics A

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Full shell-model diagonalization has been performed to study the structure of neutron-rich nuclei around 20 C. We investigate in detail the roles played by the different monopole components of the effective interaction in the evolution of the N = 14 shell in C, N and O isotopes. It is found that the relevant neutron-neutron monopole terms, V nn d 5/2 d 5/2 and V nn s 1/2 s 1/2 , contribute significantly to the reduction of the N = 14 shell gap in C and N isotopes in comparison with that in O isotopes. The origin of this unexpectedly large effect, which is comparable with (sometimes even larger than) that caused by the proton-neutron interaction, is related to the enhanced configuration mixing in those nuclei due to many-body correlations. Such a scheme is also supported by the large B(E2) value in the nucleus 20 C which has been measured recently.

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Nuclear structure study ofN19,21nuclei byγspectroscopy

Cited by 12 publications

References 16 publications

The $^{19}$N($n$,$γ)^{20}$N capture rate in light of the probable bubble nature of $^{20}$N

The $^{19}$N($n$,$γ)^{20}$N capture rate in light of the probable bubble nature of $^{20}$N

Investigation ofN23in a three-body model

Shell evolution in neutron-rich carbon isotopes: Unexpected enhanced role of neutron–neutron correlation

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