Nuclear Data Sheets for A = 1

Singh, Balraj

doi:10.1016/j.nds.2005.11.004

Cited by 6 publications

(6 citation statements)

References 327 publications

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“…Data on 100 Zr are presented in the compilation [29], the ones on 102 Zr are in [30], and 104 Zr are in [31]. Data for 106 Zr and 108 Zr are in [32] and [33], respectively. Regarding 106 Zr, in Ref.…”

Section: Evidences Of Shape Coexistence In Zr Nucleimentioning

confidence: 99%

Subtle connection between shape coexistence and quantum phase transition: The Zr case

García‐Ramos

Heyde

2020

Phys. Rev. C

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Background: Zr region is characterized by very rapid changes in the ground state structure of the nuclei. In particular, the onset of deformation when passing from 98 Zr to 100 Zr is one of the fastest ever observed in the nuclear chart. It has been probed both experimental and theoretically that certain low-lying excited states of Zr isotopes own different shapes than the ground state. Purpose: We intend to disentangle the interplay between the sudden changes in the ground state shape, i.e., the existence of a quantum phase transition, and the presence in the spectra of coexisting states with very different deformation, i.e., the presence of shape coexistence. Method: We rely on a previous calculation using the Interacting Boson Model with Configuration Mixing (IBM-CM) which reproduces in detail the spectroscopic properties of 96−110 Zr. This IBM-CM calculation allows to compute mean-field energy surfaces, wave functions and any other observable related with the presence of shape coexistence or with a quantum phase transition. Results: We obtain energy surfaces and the equilibrium value of the deformation parameter β, the U(5) decomposition of the wave functions and the density of states. Conclusions: We confirm that Zr is a clear example of quantum phase transition that originates from the crossing of two configurations with a very different degree of deformation. Moreover, we observe how the intruder configuration exhibits its own evolution which resembles a quantum phase transition too.

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Section: Evidences Of Shape Coexistence In Zr Nucleimentioning

confidence: 99%

Subtle connection between shape coexistence and quantum phase transition: The Zr case

García‐Ramos

Heyde

2020

Phys. Rev. C

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“…We have made use of the most recent Nuclear Data Sheets references, namely, [17] for A = 92, [18] for A = 94, [19] for A = 96, [20] for A = 98, [21] for A = 100, [22] for A = 102, [23] for A = 104, [24] for A = 106, and [25] for A = 108. Within the last ∼ 20 years, extensive use has been made of a large set of complementary probes in order to characterize both the electromagnetic decay of the levels in the Zr series of isotopes, spanning the region from A = 90 up to A = 110.…”

Section: Experimental Data In the Even-even Zr Nucleimentioning

confidence: 99%

“…We [23] for A = 104, [24] for A = 106, and [25] for A = 108. Within the last ∼ 20 years, extensive use has been made of a large set of complementary probes in order to characterize both the electromagnetic decay of the levels in the Zr series of isotopes, spanning the region from A = 90 up to A = 110.…”

Section: Experimental Data In the Even-even Zr Nucleimentioning

confidence: 99%

“… Zr Singh and Hu [20], Bettermann et al[42],Ansari et al. [43], Singh et al [44], Werner et al [45], Witt et al [46], Lhersonneau et al [47], Urban et al [48] 100 Zr Singh [21], Ansari et al [43], Hwang et al [49], Urban et al [50], Urban et al [51] 102 Zr DeFrenne [22], Ansari et al [43], Urban et al [51] 104 Zr Blachot [23], Hwang et al [49], Browne et al [52], Hotchkis et al [53], Yeoh et al [54]106 Zr Singh[24], Sumikama et al[55], Navin et al[56], Browne et al[52] 108 Zr Singh[25], Sumikama et al[55], Kameda et al[57] 110 Zr Paul et al[58] Having concentrated on energy spectra, it is of major importance to present at the very…”

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confidence: 99%

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Quest of shape coexistence in Zr isotopes

García‐Ramos

Heyde

2019

Phys. Rev. C

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Background: The mass region with A ≈ 100 and Z ≈ 40 is known to experience a sudden onset of deformation. The presence of the subshell closure Z = 40 makes feasible to create particle-hole excitations at a moderate excitation energy and, therefore, likely intruder states could be present in the low-lying spectrum. In other words, shape coexistence is expected to be a key ingredient to understand this mass region.Purpose: The aim of this work is to describe excitation energies, transition rates, radii, and twoneutron separation energies for the even-even 94−110 Zr nuclei and, moreover, to obtain information about wave functions and deformation.Method: The interacting boson model with configuration mixing will be the framework to study the even-even Zr nuclei, considering only two types of configurations: 0particle-0hole and 2particle-2hole excitations. On one hand, the parameters appearing in the Hamiltonian and in the E2 transition operator are fixed trough a least-squares fit to the whole available experimental information. On the other hand, once the parameters have been fixed, the calculations allow to obtain a complete set of observables for the whole even-even Zr chain of isotopes.Results: Spectra, transition rates, radii, ρ 2 (E0), and two-neutron separation energies have been calculated and a good agreement with the experimental information has been obtained. Moreover, a detailed study of the wave function has been conducted and mean-field energy surfaces and deformation have been computed too.Conclusions: The importance of shape coexistence has been shown to correctly describe the A ≈ 100 mass area for even-even Zr nuclei. This work confirmed the rather spherical nature of the ground state of 94−98 Zr and its deformed nature for 100−110 Zr isotopes. The sudden onset of deformation in 100 Zr is owing to the rapid lowering of a deformed (intruder) configuration which is high-lying in lighter isotopes. 21.60.Fw

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“…The least stable with a half-life of 7.6×10 −22 s is 5 He, though it is likely that 2 He has shorter half-life. In the atmosphere of Earth, there is one 3 He for each million 4 He. However, helium is remarkable in that its isotopic richness varies greatly liable on its origin.…”

Section: Resultsmentioning

confidence: 99%

Analytical Study of Some Lightest Nuclei H, He, Li and Be

Hwash¹,

Saeed²

2020

IHJPAS

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In the present study, the properties of the light elements, namely, H, He, Li, and Be, have been reviewed. Specifically, the nuclear decay of these nuclei has been reviewed. The mystery of the nuclear decay and potential is behind this work. The role of neutron has been investigated. The N/Z ratio has also been investigated in the study to relate the nuclear decay with the ratio. A new formula for nuclear potential has been suggested in the present study. This formula can describe the binding energy potential and the decayed particle energy depending on the N/Z ratio.

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Nuclear Data Sheets for A = 1

Cited by 6 publications

References 327 publications

Subtle connection between shape coexistence and quantum phase transition: The Zr case

Subtle connection between shape coexistence and quantum phase transition: The Zr case

Quest of shape coexistence in Zr isotopes

Analytical Study of Some Lightest Nuclei H, He, Li and Be

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