Effect of nuclear deformation on proton bubble structure in Z = 14 isotopes

Kumar, Pankaj; Thakur, Virender; Thakur, Smriti; Kumar, Vikesh; Sharma, Ashok K.; Kumar, Raj; Dhiman, Shashi K.

doi:10.1140/epja/s10050-022-00801-y

Cited by 3 publications

(8 citation statements)

References 51 publications

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“…Doing this for an isotopic chain shows the evolution of the nuclear shape with the nucleon number as well as the coexistence of more than one shapes as additional equilibrium points with similar energy. Examples of this approach can be found in [41,[46][47][48][49][50][51][52][53].…”

Section: Theoretical Frameworkmentioning

confidence: 99%

Islands of shape coexistence from single-particle spectra in covariant density functional theory

et al. 2022

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Shape coexistence in even-even nuclei is observed when the ground state band of a nucleus is accompanied by another K=0 band at similar energy but with radically different structure. We attempt to predict regions of shape coexistence throughout the nuclear chart using the parameter-free proxy-SU(3) symmetry and standard covariant density functional theory. Within the proxy-SU(3) symmetry the interplay of shell model magic numbers, formed by the spin-orbit interaction, and the 3-dimensional isotropic harmonic oscillator magic numbers, leads to the prediction of specific horizontal and vertical stripes on the nuclear chart in which shape coexistence should be possible. Within covariant density functional theory, specific islands on the nuclear chart are found, in which particle-hole excitations leading to shape coexistence are observed. The role played by particle-hole excitations across magic numbers as well as the collapse of magic numbers as deformation sets in is clarified.

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Section: Theoretical Frameworkmentioning

confidence: 99%

Islands of shape coexistence from single-particle spectra in covariant density functional theory

et al. 2022

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“…The characterization performed in the present manuscript is same as reported in our earlier work [7,28] and their details can be found from there .…”

Section: B Characterizationmentioning

confidence: 97%

“…In line with our previous investigations, the PLE of Er 3+ doped CaTiO 3 manifested multiple narrow bands between 350 and 500 nm, corresponding to distinct 4f electronic transitions of Er 3+ ions. Notably, sharp bands at 372, 401 nm, 442, and 484 nm denote 4 I 15/2 → 4 G 11/2 , 4 I 15/2 → 2 H 9/2 , 4 I 15/2 → 4 F 3/2 + 4 F 5/2 , and 4 I 15/2 → 4 F 7/2 transitions of Er 3+ ions, respectively [7,47]. For the analysis of PL properties, emission spectra were recorded at 372 nm excitation for all synthesized samples.…”

Section: Dmentioning

confidence: 99%

“…The versatility and efficacy of these materials make them integral components in a spectrum of cutting-edge technologies. From precise laser systems to highly sensitive temperature monitoring devices, and from state-of-the-art display technologies to innovative lighting solutions, the multifaceted utility of these materials underscores their significance in various industries [6][7][8][9]. Conventional lighting sources, such as incandescent and fluorescent lights, constitute a significant portion of global electricity consumption, exceeding one-fourth of the total energy used worldwide.…”

Section: Introductionmentioning

confidence: 99%

“…A key rationale for selecting Er 3+ ions as dopants resides in their distinct energy levels, specifically 2 H 11/2 and 4 S 3/2 , which exhibit thermal coupling and yield green light emission. This characteristic renders Er 3+ ions particularly advantageous for applications spanning optical thermometry and the development of nano phosphors emitting green light [7]. While up conversion phosphor-based optical thermometers have been extensively scrutinized and find application in diverse fields, the competitive advantages offered by downconverting nano phosphors warrant a more comprehensive investigation for optical thermometer design.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Green Emission in Thermally Stable Er³⁺ Doped Lead-Free Perovskite Phosphor for Solid-State Lighting and Optical Thermometry Applications

Kumar,

Kumar

et al. 2024

IEEE Photonics J.

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CaTiO 3 :xEr 3+ (0.1≤x≤7 mole %) phosphor materials were meticulously prepared through the solution combustion method. Comprehensive analyses employing Powder X-ray Diffraction (PXRD), Field Emission Scanning Electron Microscopy (FESEM), and Fourier Transform Infrared Spectroscopy (FTIR) were conducted to investigate the phase, morphology, and vibrational characteristics of the synthesized phosphors. A detailed luminescence study was undertaken using photoluminescence spectroscopy, revealing distinctive 4f-4f transitions associated with Er 3+ in both excitation and emission spectra. The application of Dexter's theory provided insights into the quenching mechanism inherent in CaTiO 3 :Er 3+ phosphors. Photometric studies were carried out to evaluate the suitability of the synthesized material for solid-state lighting applications. Furthermore, to assess the thermal stability of the phosphor material, the activation energy was computed. The fluorescence intensity ratio of thermally coupled energy levels of Er 3+ ion was utilized to assess the temperature-sensing capabilities of the synthesized material. This material may be suitable for solidstate lighting and optical thermometry applications. Index terms-Perovskite, Phosphor, solid-state lighting, and optical thermometry.

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Correlation between the nuclear structure and reaction dynamics of Ar-isotopes as projectile using the relativistic mean-field approach

et al. 2023

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Effect of nuclear deformation on proton bubble structure in Z = 14 isotopes

Cited by 3 publications

References 51 publications

Islands of shape coexistence from single-particle spectra in covariant density functional theory

Islands of shape coexistence from single-particle spectra in covariant density functional theory

Green Emission in Thermally Stable Er³⁺ Doped Lead-Free Perovskite Phosphor for Solid-State Lighting and Optical Thermometry Applications

Correlation between the nuclear structure and reaction dynamics of Ar-isotopes as projectile using the relativistic mean-field approach

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Effect of nuclear deformation on proton bubble structure in Z = 14 isotopes

Cited by 3 publications

References 51 publications

Islands of shape coexistence from single-particle spectra in covariant density functional theory

Islands of shape coexistence from single-particle spectra in covariant density functional theory

Green Emission in Thermally Stable Er3+ Doped Lead-Free Perovskite Phosphor for Solid-State Lighting and Optical Thermometry Applications

Correlation between the nuclear structure and reaction dynamics of Ar-isotopes as projectile using the relativistic mean-field approach

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Product

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Green Emission in Thermally Stable Er³⁺ Doped Lead-Free Perovskite Phosphor for Solid-State Lighting and Optical Thermometry Applications