Full disassembly of excited 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Mg</mml:mi><mml:mprescripts /><mml:none /><mml:mn>24</mml:mn></mml:mmultiscripts></mml:math>
 into six 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>α</mml:mi></mml:math>
 particles

Morelli, L.; Bruno, M.; D’Agostino, M.; Baiocco, G.; Gulminelli, F.; Barlini, S.; Buccola, A.; Camaiani, A.; Casini, G.; Ciampi, C.; Frosin, C.; Gelli, N.; Olmi, A.; Ottanelli, P.; Pasquali, G.; Piantelli, S.; Valdré, S.; Cicerchia, M.; Cinausero, M.; Gramegna, F.; Mantovani, G.; Marchi, T.; Degerlier, M.; Fabris, D.; Kravchuk, V. L.

doi:10.1103/physrevc.99.054610

Cited by 11 publications

(23 citation statements)

References 44 publications

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“…In summary, the reaction mechanism of the 12 C( 16 O, 28 Si ) channel was studied at three beam energies of 160, 280, and 400 MeV. This experiment was performed to search for α-gas states in 12 C, 16 O, 20 Ne, 24 Mg and 28 Si. No such states were found for systems heavier than 12 C. In the case of heavier isotopes, there were various reasons discussed in this work in detail which could have obscured the observation of those states.…”

Section: Discussionmentioning

confidence: 99%

“…This system is analogous to a Bose-Einstein Condensate which has been well studied in atomic systems [17,18]. This work has been furthered in the nuclear realm by several experiments involving high-multiplicity particle decays [19][20][21] and experiments to observe an α-gas via "Coulomb explosion" of 40 Ca appear possible from a theoretical perspective [22]. Such an exotic state of matter is therefore postulated to describe the well-studied light N-α clustered states ( 8 Be(g.s) and 12 C(0 + 2 )) and is known as an α-condensate.…”

Section: Introductionmentioning

confidence: 98%

“…31. Q-value for20 Ne + 8 Be while reconstructing the missing8 Be from the measured 20 Ne from 5 α-particle events.α-particle being undetected. This matches well with the EHF calculations which demonstrated the multiplicity 6 yield is expected to be very small by virtue of the need to break apart an α-particle (only becoming more common at a beam energy of 400 MeV, agreeing with the result seen here).…”

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confidence: 99%

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Experimental investigation of α condensation in light nuclei

Bishop¹,

Kokalova²,

Freer³

et al. 2019

Phys. Rev. C

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Background: Near-threshold α-clustered states in light nuclei have been postulated to have a structure consisting of a diffuse gas of α-particles which condense into the 0s orbital. Experimental evidence for such a dramatic phase change in the structure of the nucleus has not yet been observed. Method:To examine signatures of this α-condensation, a compound nucleus reaction using 160, 280, and 400 MeV 16 O beams impinging on a carbon target was used to investigate the 12 C( 16 O, 7α) reaction. This permits a search for near-threshold states in the α-conjugate nuclei up to 24 Mg.Results: Events up to an α-particle multiplicity of 7 were measured and the results were compared to both an Extended Hauser-Feshbach calculation and the Fermi break-up model. The measured multiplicity distribution exceeded that predicted from a sequential decay mechanism and had a better agreement with the multi-particle Fermi break-up model. Examination of how these 7α final states could be reconstructed to form 8 Be and 12 C(0 + 2 ) showed a quantitative difference in which decay modes were dominant compared to the Fermi break-up model. No new states were observed in 16 O, 20 Ne, and 24 Mg due to the effect of the N-α penetrability suppressing the total α-particle dissociation decay mode. Conclusion:The reaction mechanism for a high energy compound nucleus reaction can only be described by a hybrid of sequential decay and multi-particle breakup. Highly α-clustered states were seen which did not originate from simple binary reaction processes. Direct investigations of near-threshold states in N-α systems are inherently impeded by the Coulomb barrier prohibiting the observation of states in the N-α decay channel. No evidence of a highly clustered 15.1 MeV state in 16 O was observed from ( 28 Si , 12 C(0 + 2 )) 16 O(0 + 6 ) when reconstructing the Hoyle state from 3 α-particles. Therefore, no experimental signatures for α-condensation were observed. arXiv:1907.05471v2 [nucl-ex]

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

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confidence: 99%

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Experimental investigation of α condensation in light nuclei

Bishop¹,

Kokalova²,

Freer³

et al. 2019

Phys. Rev. C

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“…In this paper one demonstrates, by means of the AMD simulation coupled with statistical models, that the charge equilibration process measured via isospin transport ratio is indeed affected by perturbations introduced by the dynamical and sta- tistical emissions from the fragments after their separation. In particular, the statistical emission (described by Gemini++ code) tends to introduce non-linear spurious distortions at low excitation energies (where structure effects are well known to affect the particle emission [67][68][69]), i.e. for large impact parameters, while the distortion becomes smoother and linear with increasing excitation.…”

Section: Neutron-proton Equilibrationmentioning

confidence: 99%

Isospin diffusion measurement from the direct detection of a quasiprojectile remnant

Camaiani¹,

Casini²,

Piantelli³

et al. 2021

Phys. Rev. C

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“…The investigation of the causes behind the nonlinearity at low E * /A is out of the goal of this paper. A possible contribution could be due to structure effects, since is well known that they affect the particle emission at low excitation energy [42][43][44]. In this sense, the isoscaling analysis [4,5] could be more suited as it divides out many structure effects to the first order.…”

Section: Statistical De-excitation Effectsmentioning

confidence: 99%

Influence of fast emissions and statistical de-excitation on the isospin transport ratio

Camaiani,

Piantelli,

Ono

et al. 2020

Preprint

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Full disassembly of excited Mg24 into six α particles

Cited by 11 publications

References 44 publications

Experimental investigation of α condensation in light nuclei

Experimental investigation of α condensation in light nuclei

Isospin diffusion measurement from the direct detection of a quasiprojectile remnant

Influence of fast emissions and statistical de-excitation on the isospin transport ratio

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