<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>α</mml:mi></mml:math>clustering in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Pb</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>208</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>from (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>d</mm

Becchetti, F. D.; Jänecke, J.; Overway, D.; Cossairt, J.D.; Spross, Ronald L.

doi:10.1103/physrevc.19.1775

Cited by 8 publications

(6 citation statements)

References 46 publications

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“…Also known were the four levels between 1.8 and 2 MeV [,18], which are confirmed by our work. Furthermore there is a recent very tentative suggestion of a 7-level at 2,240 (50) keV from a study of the 2~ 6Li) reaction [31]. Our assignments of U --5-and 7-for the 2,263 and 2,301keV levels, respectively, follow from the observed multipolarities and excitation functions of the 110 and 1,134keV transitions.…”

Section: The Decay Schemes Of 2~ and 2~mentioning

confidence: 60%

“…We have performed preliminary measurements of the (d, 3He) reactions at E d =45MeV with an energy resolution of ~40keV [42], but better resolution is necessary to resolve the complicated structures above 1.8 MeV excitation energy. Finally, a few other nuclear reactions are possible, and have partly been studied, as for example the (p,p') [43], (d,d') [10], (d,6Li) [31], or (14C, 160) reactions. But these reactions are rather difficult to study or yield only very special information.…”

Section: Resultsmentioning

confidence: 99%

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Investigation of196,198Pt and202,204Hg with the (d, pn?) reaction

et al. 1984

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Gamma-ray and conversion electron spectra were measured in the reaction of 25 MeV deuterons on 174yb, 196'19apt, 2~176 and 132Th. The (d, pxn) deuteron break-up reactions were studied by the measurement of py-and 77-coincidences. Levels with spins up to approximately 10h are observed in the (d, pn) reactions, with a strong preference of the population of yrast states. In the Pt and Hg nuclei the ground bands are seen up to the 6 + states and in 196,198pt the semi-decoupled 5-, 7-, and 9-yrast levels are populated most strongly. In 2~176 we observe fairly strongly new levels with tentative assignments of 5-and 7-. In addition a number of previously unknown levels are identified in the Pt and Hg nuclei, for which no spin-parity assignments could be obtained. A discussion of the level structure in terms of the interacting boson model (196,198pt) and the shell model (/~176 is given.

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Section: The Decay Schemes Of 2~ and 2~mentioning

confidence: 60%

Section: Resultsmentioning

confidence: 99%

Investigation of196,198Pt and202,204Hg with the (d, pn?) reaction

et al. 1984

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“…This is the distance at which the α-particle is picked up in the alpha transfer reactions. 11,12 Following Ref. 13, the u DW (r) = rR DWBA L (r) that we have constructed and shown in the sixth column are normalized within a sphere of 20 fm.…”

Section: Discussionmentioning

confidence: 99%

“…Such normalized wavefunctions R DWBA L (r) have been used extensively in the DWBA analysis of α-decay and alpha transfer reactions. [11][12][13] The reduced width determined in this way will, in general, differ from the absolute determination from α-decay. The ratio of the two yields the spectroscopic factor S α .…”

Section: Widths From α-Decaymentioning

confidence: 99%

Projection Operator Treatment for Sub-Coulomb Widths

Khan

2004

Int. J. Mod. Phys. E

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An exact expression using the projection operator method to extract widths and spectroscopic factors is derived. It is applied to sub-Coulomb resonances as they occur in α-decay. A number of α-decaying nuclei are investigated. The widths and spectroscopic factors extracted using the proposed expression are found to be in excellent agreement with those obtained by other methods. Earlier equations of the projection operator for widths and spectroscopic factors would give unrealistic results in this region.

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“…This spectrum is dominated by the 437-keV, 2 + 1 → 0 + , transition of 204 Hg with 9.5 × 10 7 counts. All other strong γ rays originate from 204 Hg excited states [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38] as well and most of these are in coincidence with the ground-state transition (cf. Fig.…”

Section: Methodsmentioning

confidence: 99%

Identification of the one-quadrupole phonon 21,ms+ state of 204Hg

et al. 2017

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Available online xxxx Editor: V. Metag Keywords: γ ray spectroscopy Coulomb excitation Quadrupole collectivity Isospin degree of freedom Shell structureOne-phonon states of vibrational nuclei with mixed proton-neutron symmetry have been observed throughout the nuclear chart besides the mass A ≈ 200 region. Very recently, it has been proposed that the 2 + 2 state of 212 Po is of isovector nature. This nucleus has two valence protons and two valence neutrons outside the doubly-magic 208 Pb nucleus. The stable isotope 204 Hg, featuring two valence-proton and valence-neutron holes, with respect to 208 Pb, is the particle-hole mirror of 212 Po. In order to compare the properties of low-lying isovector excitations in these particle-hole mirror nuclei, we have studied 204 Hg by using the projectile Coulomb-excitation technique. The measured absolute B(M1; 2 +strength of 0.20 (2) μ 2 N indicates that the 2 + 2 level of 204 Hg is at least the main fragment of the 2 + 1,ms state. For the first time in this mass region, both lowest-lying, one-quadrupole phonon excitations are established together with the complete set of their decay strengths. This allows for a microscopic description of their structures, achieved in the framework of the Quasi-particle Phonon Model.

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αclustering inPb208from (d

Cited by 8 publications

References 46 publications

Investigation of196,198Pt and202,204Hg with the (d, pn?) reaction

Investigation of196,198Pt and202,204Hg with the (d, pn?) reaction

Projection Operator Treatment for Sub-Coulomb Widths

Identification of the one-quadrupole phonon 21,ms+ state of 204Hg

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