Survival of orbiting in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Ne</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>20</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>(7–10 MeV/nucleon) +<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">C</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>12</mml:mn></mml:mrow></mml:mmultiscripts></mml:math

Bhattacharya, C.; Dey, A.; Kundu, S.; Banerjee, K.; Bhattacharya, Subhashish; Mukhopadhyay, S.; Gupta, D.; Bhattacharjee, T.; Banerjee, S.; Bhattacharyya, S.; Rana, T. K.; Basu, Sourav; Saha, Rajarshi; Bhattacharjee, Srijit; Krishan, K.; Mukherjee, A.; Bandopadhyay, D.; Beck, Christian

doi:10.1103/physrevc.72.021601

Cited by 32 publications

(18 citation statements)

References 25 publications

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“…Our mean-field calculations with the SLy4 parametrization [30] predict that 70 Ca is bound while 72 Ca is unbound. This is in general agreement with other mean-field calculations of various types [19,31]. However, 72 Ca ( 70 Ca+n+n) is bound in a three-body calculation where the two-body subsystems are unbound.…”

supporting

confidence: 91%

Emergence of Clusters: Halos, Efimov States, and Experimental Signals

et al. 2018

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We investigate the emergence of halos and Efimov states in nuclei by use of a newly designed model that combines self-consistent mean-field and three-body descriptions. Recent interest in neutron heavy calcium isotopes makes ^{72}Ca (^{70}Ca+n+n) an ideal realistic candidate on the neutron dripline, and we use it as a representative example that illustrates our broadly applicable conclusions. By smooth variation of the interactions we simulate the crossover from well-bound systems to structures beyond the threshold of binding, and find that halo configurations emerge from the mean-field structure for three-body binding energy less than ∼100 keV. Strong evidence is provided that Efimov states cannot exist in nuclei. The structure that bears the most resemblance to an Efimov state is a giant halo extending beyond the neutron-core scattering length. We show that the observable large-distance decay properties of the wave function can differ substantially from the bulk part at short distances, and that this evolution can be traced with our combination of few- and many-body formalisms. This connection is vital for interpretation of measurements such as those where an initial state is populated in a reaction or by a beta decay.

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supporting

confidence: 91%

Emergence of Clusters: Halos, Efimov States, and Experimental Signals

et al. 2018

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“…Since our measurement was biased towards the higher multiplicity events, it can be inferred that the γ-rays are emitted from a fully energy equilibrated composite. Our earlier charge particle experiments [12,31], for the same reaction, clearly revealed that the damped fragments (Z=3-7) are emitted from a fully energy equilibrated composites and follow a 1/sinθ cm angular dependence. Therefore, the contribution to the high energy component from incomplete fusion and deep-inelastic process can be completely ruled out.…”

Section: Resultsmentioning

confidence: 76%

“…Ichikawa et al, emphasized the inclusion of the rotational energy contribution and showed that the nuclear densities in the SD band become cluster-like at high angular momentum (J). Experimentally, the inelastic scattering and the damped fragment yields, in the reaction 20 Ne + 12 C, indicated the survival of an orbiting dinuclear system [10][11][12]. It is now well known that these cluster structures are associated with strongly deformed shapes of nuclei.…”

Section: Introductionmentioning

confidence: 99%

Signature of clustering in quantum many-body systems probed by the giant dipole resonance

et al. 2017

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The present experimental study illustrates how large deformations attained by nuclei due to cluster formation are perceived through the giant dipole resonance (GDR) strength function. The high energy GDR γ-rays have been measured from 32 S at different angular momenta (J) but similar temperatures in the reactions 4 He(E lab =45MeV) + 28 Si and 20 Ne(E lab =145MeV) + 12 C. The experimental data at lower J (∼ 10h) suggests a normal deformation, similar to the ground state value, showing no potential signature of clustering. However, it is found that the GDR lineshape is fragmented into two prominent peaks at high J (∼ 20h) providing a direct measurement of the large deformation developed in the nucleus. The observed lineshape is also completely different from the ones seen for Jacobi shape transition at high J pointing towards the formation of cluster structure in super-deformed states of 32 S at such high spin. Thus, the GDR can be regarded as a unique tool to study cluster formation at high excitation energies and angular momenta.

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“…The BCS equations are obtained by taking λ 2 = 0 in the LN equations (5)- (12) with λ 1 being the Fermi level. For this special case Eqs.…”

Section: Lipkin-nogami Equationsmentioning

confidence: 99%

“…This implies that any theoretical model which aim is to describe the properties of exotic nuclei must consider the coupling with the continuum spectrum of energy. Many of such theoretical models are described in references [7][8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Pairing in the BCS and LN approximations using continuum single particle level density

Betán

Repetto

2017

Nuclear Physics A

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Understanding the properties of drip line nuclei requires to take into account the correlations with the continuum spectrum of energy of the system. This paper has the purpose to show that the continuum single particle level density is a convenient way to consider the pairing correlation in the continuum. Isospin mean-field and isospin pairing strength are used to find the Bardeen-Cooper-Schrieffer (BCS) and Lipkin-Nogami (LN) approximate solutions of the pairing Hamiltonian. Several physical properties of the whole chain of the Tin isotope, as gap parameter, Fermi level, binding energy, and one-and two-neutron separation energies, were calculated and compared with other methods and with experimental data when they exist. It is shown that the use of the continuum single particle level density is an economical way to include explicitly the correlations with the continuum spectrum of energy in large scale mass calculation. It is also shown that the computed properties are in good agreement with experimental data and with more sophisticated treatment of the pairing interaction.

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Survival of orbiting inNe20(7–10 MeV/nucleon) +C12

Cited by 32 publications

References 25 publications

Emergence of Clusters: Halos, Efimov States, and Experimental Signals

Emergence of Clusters: Halos, Efimov States, and Experimental Signals

Signature of clustering in quantum many-body systems probed by the giant dipole resonance

Pairing in the BCS and LN approximations using continuum single particle level density

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