Fission decay of the isoscalar giant quadrupole resonance in 24Mg

Lawitzki, S; Pade, D.; Gonsior, B.; Uhlhorn, C.D.; Brandenburg, S.; Harakeh, Mohsen; Wilschut, Hans

doi:10.1016/0370-2693(86)91092-0

Cited by 25 publications

(13 citation statements)

References 20 publications

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“…Some of the simpler configurations found in the three-dimensional search are rather akin to chain states, in that they consist of linear arrangements of more complicated clusters (figure 22). For example, a minimum has been found in the 36 Ar energy surface which corresponds to a linear 16 O- 16 O-α combination, and a similar minimum occurs in the 48 Cr energy surface corresponding to a linear 16 O- 16 O- 16 O chain of three oxygen nuclei [138]. Both of these configurations have 3:1 major:minor axis ratios, and large moments of inertia, so that any rotational band of states based on them should exhibit a rather slow increase of energy with angular momentum.…”

Section: Three-dimensional Alpha Cluster Configurationsmentioning

confidence: 90%

Developments in the study of nuclear clustering in light even - even nuclei

Freer¹,

Merchant²

1997

J. Phys. G: Nucl. Part. Phys.

122

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We review some of the developments in the experimental and theoretical understanding of cluster symmetries. We pay particular attention to the association of clustering with highly deformed configurations and to the ways in which the symmetries of the nuclear interaction give rise to many different cluster modes. On the experimental side we concentrate particularly on those experimental studies of clustering where resonant particle spectroscopy is applied to breakup reactions, using position-sensitive, charged-particle detectors. We investigate the role of clustering and cluster models in nuclear reactions and examine the recent evidence for -cluster chain configurations in the light even - even nuclei from to . On the theoretical side, we briefly introduce fully microscopic models, but concentrate mainly on Bloch - Brink and local potential cluster models. The double-resonance mechanism, band-crossing model and recent work on explicit models of the interaction between deformed nuclei are also summarized.

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Section: Three-dimensional Alpha Cluster Configurationsmentioning

confidence: 90%

Developments in the study of nuclear clustering in light even - even nuclei

Freer¹,

Merchant²

1997

J. Phys. G: Nucl. Part. Phys.

122

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“…For example, cluster states as 20 Ne +α, 12 C + 12 C, or 16 O +2α configurations can be studied from the excited 24 Mg nucleus. It has been proposed that cluster states are strongly populated by isoscalar monopole or dipole transitions [25][26][27]. Therefore, measurements with a good precision are required for identifying these states and the giant resonances simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the isoscalar response ofMg24toLi6scattering

Zamora¹,

Sullivan²,

Zegers³

et al. 2021

Phys. Rev. C

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Background: 24 Mg is a strongly deformed nucleus in the ground state. Deformation effects can be observed in the structure of the isoscalar giant monopole and quadrupole resonances. 24 Mg is also a nucleus that is well known to present different types of cluster-oscillation modes. Both giant resonances and cluster states are strongly populated by isoscalar transitions. Purpose: To extract the E 0, E 1, and E 2 transition strengths via 6 Li scattering. The 6 Li probe is a powerful tool for investigating the isoscalar nuclear response with a very favorable ratio of resonance-to-continuum background. Method: Double-differential cross sections of 6 Li inelastic scattering, at the beam energy of 100 MeV/u, were measured in the excitation-energy range 10-40 MeV and scattering angles 0−3 • . A multipole-decomposition analysis was performed for extracting the isoscalar E 0, E 1, and E 2 strength distributions. Results: The extracted multipole strengths were compared with predictions from consistent quasiparticle random phase approximation calculations. The theoretical predictions are in fair agreement with the experimental data. The E 0 strength was also compared with results from antisymmetrized molecular dynamics calculations found in the literature. A few peaks in the experimental data might be associated with clustering in 24 Mg. Conclusions: Ground-state deformation effects were observed in the isoscalar giant monopole resonance (ISGMR) and isoscalar giant quadrupole resonance (ISGQR) distributions. The ISGMR strength is split in two peaks around 19 and 28 MeV. The ISGQR exhibits a pronounced peak at 20 MeV with a broadening at the low-energy region, similar to predictions from microscopic calculations. Signatures of excitation of cluster states were observed in the E 0 response. Further studies including particle-decay measurements will be required to confirm the nature of the observed peaks.

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“…The cluster configurations of Mg include α + Ne, C + C, O + 2α, C + 3α, and the 6α condensation state, with increasing separation thresholds at 9.32, 13.93, 14.05, 21.21, and 28.48 MeV, respectively. These configurations have been investigated theoretically and experimentally but with limited robust outcomes, especially in the high excitation region [25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41]. One α emission (α+ Ne) corresponds to the lowest separation energy among all the cluster-decay channels of Mg and hence should appear strongly in measurements.…”

Section: Introductionmentioning

confidence: 99%

α-cluster decay from ²⁴Mg resonances produced in the ¹²C(¹⁶O,²⁴Mg)α reaction*

Wang¹,

Ye²,

Lin³

et al. 2023

Chinese Phys. C

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An α-transfer and cluster-decay experiment, 12C(16O,24Mg→α+20Ne)α, was performed at a beam energy of 96 MeV. Both the recoil and the decay α particles were detected in coincidence, allowing to deduce the energy-momentum of 20Ne fragment. A number of resonant states of 24Mg are reconstructed up to an excitation energy of about 30 MeV. Owing to the experimentally achieved excellent resolutions on Q-value and excitation-energy spectra, the relative decay widths for each resonant state in 24Mg to various final states of 20Ne have been extracted, together with the total decay width. The obtained results provide a good test ground for theoretical descriptions of the multiple clustering configurations in 24Mg.

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Fission decay of the isoscalar giant quadrupole resonance in 24Mg

Cited by 25 publications

References 20 publications

Developments in the study of nuclear clustering in light even - even nuclei

Developments in the study of nuclear clustering in light even - even nuclei

Investigation of the isoscalar response ofMg24toLi6scattering

α-cluster decay from ²⁴Mg resonances produced in the ¹²C(¹⁶O,²⁴Mg)α reaction*

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Fission decay of the isoscalar giant quadrupole resonance in 24Mg

Cited by 25 publications

References 20 publications

Developments in the study of nuclear clustering in light even - even nuclei

Developments in the study of nuclear clustering in light even - even nuclei

Investigation of the isoscalar response ofMg24toLi6scattering

α-cluster decay from 24Mg resonances produced in the 12C(16O,24Mg)α reaction*

Contact Info

Product

Resources

About

α-cluster decay from ²⁴Mg resonances produced in the ¹²C(¹⁶O,²⁴Mg)α reaction*