Evidence for the pair-breaking process in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Sn</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>116</mml:mn><mml:mo>,</mml:mo><mml:mn>117</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>

Agvaanluvsan, U.; Larsen, A. C.; Guttormsen, M.; Chankova, R.; Mitchell, G. E.; Schiller, A.; Siem, S.; Voinov, A.

doi:10.1103/physrevc.79.014320

Cited by 41 publications

(57 citation statements)

References 24 publications

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“…The agreement in this region is very good. In the low energy region gamma strength functions from ( 3 He, 3 He γ) and ( 3 He, αγ) for 116,118,122 Sn are shown [22,23]. Unfortunately no GSF for 120 Sn from this type of experiments is available.…”

Section: Gamma Strength Function and Level Density Of 120 Snmentioning

confidence: 99%

Systematics of the electric dipole response in stable tin isotopes

2018

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Abstract. The electric dipole is an important property of heavy nuclei. Precise information on the electric dipole response provides information on the electric dipole polarisability which in turn allows to extract important constraints on neutron-skin thickness in heavy nuclei and parameters of the symmetry energy. The tin isotope chain is particularly suited for a systematic study of the dependence of the electric dipole response on neutron excess as it provides a wide mass range of accessible isotopes with little change of the underlying structure. Recently an inelastic proton scattering experiment under forward angles including 0• on 112,116,124 Sn was performed at the Research Centre for Nuclear Physics (RCNP), Japan with a focus on the low-energy dipole strength and the polarisability. First results are presented here. Using data from an earlier proton scattering experiment on 120 Sn the gamma strength function and level density are determined for this nucleus.

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Section: Gamma Strength Function and Level Density Of 120 Snmentioning

confidence: 99%

Systematics of the electric dipole response in stable tin isotopes

2018

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“…(1) and, at the same time, keep the same quantitative individual information of their order and chaos contributions is still an open question. In addition, the attractive subject of the research is to learn statistical properties of the new symmetry breaking phenomenon [7,[41][42][43][44][45], in particular, a vilation of the isospin symmetry and pair correlation breaking. Another attractive subject is related to a symmetry breaking due to a fixed projection of the angular momentum K in a nuclear collective motion [7,42,44].…”

Section: Introductionmentioning

confidence: 99%

Simple approach to the chaos-order contributions and symmetry breaking in nuclear spectra

2018

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The simple one-parameter nearest neighbor-spacing distribution (NNSD) is suggested for statistical analysis of nuclear spectra. This distribution is derived within the Wigner-Dyson approach in the linear approximation for the level repulsion density of quantum states. The obtained NNSD gives the individual information on the Wigner and Poisson contributions in agreement with that of the statistical experimental distributions of collective states in deformed nuclei. Using this NNSD, one finds that the symmetry breaking due to the fixing of projections of the angular momentum of collective states enhances a chaos as a shift of the NNSD from the Poisson to Wigner distribution behavior.

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“…The J-level densities up to the neutron separation energy in 116,118,122 Sn have been extracted experimentally under certain assumptions [27][28][29]. However the computed J-level densities of this work are smaller than the experimentally extracted ones near the neutron separation energy.…”

Section: Generalized-seniority Patternmentioning

confidence: 70%

Generalized-seniority pattern and thermal properties in even Sn isotopes

Jia

2016

Phys. Rev. C

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Even tin isotopes of mass number A = 108 ∼ 124 are calculated with realistic interactions in the generalized-seniority approximation of the nuclear shell model. For each nucleus, we compute the lowest ten thousand states (5000 of each parity) up to around 8 MeV in excitation energy, by allowing as many as four broken pairs. The lowest fifty eigen energies of each parity are compared with the exact results of the large-scale shell-model calculation. The wavefunctions of the mid-shell nuclei show a clear pattern of the stepwise breakup of condensed coherent pairs with increasing excitation energy. We also compute in the canonical ensemble the thermal properties -level density, entropy, and specific heat -in relation to the thermal pairing phase transition.

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Evidence for the pair-breaking process inSn116,117

Cited by 41 publications

References 24 publications

Systematics of the electric dipole response in stable tin isotopes

Systematics of the electric dipole response in stable tin isotopes

Simple approach to the chaos-order contributions and symmetry breaking in nuclear spectra

Generalized-seniority pattern and thermal properties in even Sn isotopes

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