Symmetric and asymmetric structural evolutions of Te isotopes across the N = 82 shell closure *

Jiang, Hui; Zhou, Yijie; Lei, Y.; Shen, Jiajie; Bao, M.

doi:10.1088/1674-1137/ac0ce1

Cited by 4 publications

(5 citation statements)

References 67 publications

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“…Here, the overlap between the two S-pair condensate states is presented versus the spin of the corresponding reference state in NPA-1. building the low-lying states of nuclei in the Sn region with [33,37,[54][55][56][57][58], we adopt additional noncollective pairs of two neutron holes with spins of , that is, with . For brevity, such non-collective pairs are denoted as H pairs.…”

Section: S Dg H 11/2mentioning

confidence: 99%

Robustness of pair structures for nuclear yrast states*

Pan

Cheng

et al. 2023

Chinese Phys. C

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In this work we study robustness of pair structures for nuclear yrast states, i.e., whether the structures of relevant collective pairs as building blocks of different yrast states are the same. We focus on deformed nuclei and transitional nuclei and study yrast states of $^{28}$Si, $^{50}$Cr, and $^{132}$Xe, whose experimental $R_{4/2}$ values are 2.60, 2.40, and 2.16, respectively, using the nucleon-pair approximation (NPA) and shell-model effective interactions. For each yrast state, we consider optimized pair structures to be the ones giving the energy minimum for this state, and to find the minimum, a great number of full NPA calculations with varying pair structures are performed and the numerical optimization recipe of the conjugate gradient method is implemented. Our results suggest that optimized pair structures remain the same for all the states within a rotational band of a deformed nucleus. Our results also suggest that after the backbending, i.e., the change of the intrinsic state, the structure of the $S$ pair which is essential to build up the monopole pairing correlation still remains unchanged approximately, while the structures of the non-$S$ pairs which are essential to build up the quadrupole correlation change significantly.

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Section: S Dg H 11/2mentioning

confidence: 99%

Robustness of pair structures for nuclear yrast states*

Pan

Cheng

et al. 2023

Chinese Phys. C

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“…The coefficient of mass attenuation (μ/ρ) was obtained using the γ-energy taken from a previous study [34]. The linear attenuation coefficient of natural xenon gas was determined as , where ρ (in g/cm 3 ) represents the Xe gas density in stainless-steel spheres. The linear attenuation coefficient of stainless steel was determined as…”

Section: A Experimentally Determined Cross-sectionsmentioning

confidence: 99%

“…, where the density of iron is 7.86 g/cm 3 . The comprehensive self-absorption correction factors are presented in…”

Section: A Experimentally Determined Cross-sectionsmentioning

confidence: 99%

“…The cross sections of the 124 Xe(n, 2n) 123 132 I reactions were assessed by the TALYS-1.95 soft-ware [20] up to 20 MeV. TALYS-1.95 is a nuclear model code applied to replicate nuclear reactions comprising tritons, neutrons, photons, protons, deuterons, 3 He, and αparticles aimed at the target nuclei. It can be adopted for the reactions with incident energies up to 200 MeV [37][38][39][40][41].…”

Section: Cross-section Calculations Using Talys Codementioning

confidence: 99%

“…The 3 H(d,n) 4 He fusion could provide output energy up to 14 MeV. In this case, the neutron yields would be (5~6)×10 14 n/s [3]. Therefore, the xenon gas activation inside a fusion reactor should be considered.…”

Section: Introductionmentioning

confidence: 99%

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Cross-section measurements of (n, 2n) and (n, p) reactions on ^{124,126,128,130,131,132}Xe in the 14 MeV region and theoretical calculations of their excitation functions *

Luo

Liang

et al. 2022

Chinese Phys. C

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The reaction cross-sections of 124Xe(n, 2n)123Xe, 126Xe(n, 2n)125Xe, 128Xe(n, 2n)127Xe, 130Xe(n, 2n)129mXe, 132Xe(n, 2n)131mXe, 130Xe(n, p)130I, 131Xe(n, p)131I, and 132Xe(n, p)132I were measured at the 13.5, 13.8, 14.1, 14.4, and 14.8 MeV neutron energies. The monoenergetic neutrons were generated through the 3H(d,n)4He reaction at the China Academy of Engineering Physics using the K-400 Neutron Generator with a solid 3H-Ti target. A high-purity germanium detector was used to measure the activities of the product. The reactions 93Nb(n, 2n)92mNb and 27Al(n, α)24Na served for neutron flux calibration. The cross sections of the (n,2n) and (n,p) reactions of the xenon isotopes were acquired within the 13–15 MeV neutron energy range. These cross-sections were then compared with the IAEA-exchange format (EXFOR) database-derived experimental data together with the evaluation results of the CENDL-3, ENDF/B-VIII.0, JENDL-4.0, RUSFOND, and JEFF-3.3 data libraries as well as the theoretical excitation function obtained using the TALYS-1.95 code. The cross-sections of the reactions (except for the 124Xe(n, 2n)123Xe and 132Xe(n, p)132I) at 13.5, 13.8, and 14.1 MeV are reported for the first time in this work. The present results are helpful to provide better cross-section constraints for these reactions in the 13–15 MeV region, thus improving the quality of the corresponding database. Meanwhile, these data can also be used for the verification of relevant nuclear reaction model parameters.

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Valence mirror symmetry between Z=50 isotopes and N=82 isotones

Zong,

Ma,

Jiang

et al. 2024

Phys. Rev. C

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Symmetric and asymmetric structural evolutions of Te isotopes across the N = 82 shell closure *

Cited by 4 publications

References 67 publications

Robustness of pair structures for nuclear yrast states*

Robustness of pair structures for nuclear yrast states*

Cross-section measurements of (n, 2n) and (n, p) reactions on ^{124,126,128,130,131,132}Xe in the 14 MeV region and theoretical calculations of their excitation functions *

Valence mirror symmetry between Z=50 isotopes and N=82 isotones

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Symmetric and asymmetric structural evolutions of Te isotopes across the N = 82 shell closure *

Cited by 4 publications

References 67 publications

Robustness of pair structures for nuclear yrast states*

Robustness of pair structures for nuclear yrast states*

Cross-section measurements of (n, 2n) and (n, p) reactions on 124,126,128,130,131,132Xe in the 14 MeV region and theoretical calculations of their excitation functions *

Valence mirror symmetry between Z=50 isotopes and N=82 isotones

Contact Info

Product

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Cross-section measurements of (n, 2n) and (n, p) reactions on ^{124,126,128,130,131,132}Xe in the 14 MeV region and theoretical calculations of their excitation functions *