Excitation of two-particle-one-hole states by the 208Pb(d, p)209Pb reaction

Kovar, D. G.; Stein, N.; Bockelman, C. K.

doi:10.1016/0375-9474(74)90522-3

Cited by 77 publications

(35 citation statements)

References 28 publications

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“…Electron and hadron scattering [1][2][3][4][5] give us a uniquely precise picture of the mean-field topology, while transfer reactions to immediately neighboring nuclei establish the location and purity of single-particle states and inform on the role of residual interactions [6][7][8][9]. It is surprising that the spectroscopic properties of excited states in nuclides only two or three nucleons removed from this bastion are almost totally unknown.…”

Section: Introductionmentioning

confidence: 99%

γ -ray spectroscopy of Tl209

et al. 2017

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States in 209 Tl were populated using a multi-nucleon transfer reaction with a 136 Xe beam impinging on a thick 208 Pb target at E = 785 MeV. The beam was pulsed at 825 ns intervals in order to perform isomer decay spectroscopy. The known J π = 17/2 + isomer in 209 Tl was located at 1228(4) keV and measured to have a half-life of T 1/2 = 146(10) ns. A second isomer with J π = 13/2 + was found to have T 1/2 = 14(5) ns. The previously suggested low-energy "X" and "Y" transitions were found to have energies 57(2) and 47(2) keV respectively, while the measurement of conversion coefficients and a new decay path make the spin assignments below the isomers experimentally firm. Correlating the delayed γ-transitions with the prompt beam flash allowed the decay of states above the isomer to be found. The longer-lived isomer represents full alignment of the simplest two-particle, one-hole configuration, and illuminates the remarkably weak coupling of the proton hole to the 210 Pb core.

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Section: Introductionmentioning

confidence: 99%

γ -ray spectroscopy of Tl209

et al. 2017

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“…One objection to our calculations could arise from the value of the single particle energy of the j 15=2 orbital taken from the spectrum of 209 Pb, due the presence of a strong mixture of j 15=2 and g 9=2 3 À [22]. If half of the spectroscopic strength is assumed to be at about 3.5 MeV [23], then the singleparticle energy has to be shifted by 1 MeV: the disagreement with the BðE2Þ rates decreases, though it does not vanish, as shown in Fig. 3 by the green dashed-dotted line.…”

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confidence: 99%

New Isomers in the Full Seniority Scheme of Neutron-Rich Lead Isotopes: The Role of Effective Three-Body Forces

Gottardo¹,

Valiente-Dobón²,

Benzoni³

et al. 2012

Phys. Rev. Lett.

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The neutron-rich lead isotopes, up to 216 Pb, have been studied for the first time, exploiting the fragmentation of a primary uranium beam at the FRS-RISING setup at GSI. The observed isomeric states exhibit electromagnetic transition strengths which deviate from state-of-the-art shell-model calculations. It is shown that their complete description demands the introduction of effective three-body interactions and two-body transition operators in the conventional neutron valence space beyond 208 Pb. The shell model is nowadays able to provide a comprehensive view of the atomic nucleus [1]. It is a many-body theoretical framework, successful in explaining various features of the structure of nuclei, based on the definition of a restricted valence space where a suitable Hamiltonian can be diagonalized. This effective interaction originates from realistic two-body nuclear forces based on phenomenological nucleon-nucleon potentials, renormalized to be adapted to the truncated model space. Although the renormalization process can be treated in a rigorous mathematical way, the appearance of effective terms is often neglected in calculations, as a common but incorrect practice. The presence and relevance of these effective forces is well known also in other fields of physics, as for example in condensed matter studies [2]. Indeed, effective three-body terms appear already at the lower perturbation order [3]: PRL 109, 162502 (2012) P H Y S I C A L

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“…In this calculation, in the entrance and exit channles, the OM potential from the previous OM calculation was used and the coupling with the single neutron stripping channel was included. The overlap form factors, 8 He| 7 He + n and 209 Pb| 208 Pb + n , were taken from [9,10]. The comparison between both calculations reveals the importance of the coupling with the 1n stripping channel for 8 He, producing a reduction on the elastic cross section.…”

Section: Resultsmentioning

confidence: 99%

Near barrier scattering of⁸He on²⁰⁸Pb

Marquínez-Durán

Sánchez-Benítez

Martel

et al. 2014

EPJ Web of Conferences

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Abstract. The exotic nucleus 8 He is investigated by means of the measurement of the angular distributions of the elastic channel and the 6 He and 4 He fragment yields produced in the collision with a 208 Pb target at two energies around the Coulomb barrier, 16 and 22 MeV. The experiment was performed at the GANIL-SPIRAL facility, with the aim of extracting information about the structure of 8 He and the relevant reaction mechanisms. In this contribution, details of the experimental setup and preliminary data on elastic cross sections are reported. a

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Excitation of two-particle-one-hole states by the 208Pb(d, p)209Pb reaction

Cited by 77 publications

References 28 publications

γ -ray spectroscopy of Tl209

γ -ray spectroscopy of Tl209

New Isomers in the Full Seniority Scheme of Neutron-Rich Lead Isotopes: The Role of Effective Three-Body Forces

Near barrier scattering of⁸He on²⁰⁸Pb

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Excitation of two-particle-one-hole states by the 208Pb(d, p)209Pb reaction

Cited by 77 publications

References 28 publications

γ -ray spectroscopy of Tl209

γ -ray spectroscopy of Tl209

New Isomers in the Full Seniority Scheme of Neutron-Rich Lead Isotopes: The Role of Effective Three-Body Forces

Near barrier scattering of8He on208Pb

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Near barrier scattering of⁸He on²⁰⁸Pb