Nuclear Data Sheets for A = 208

Martin, M.J.

doi:10.1016/j.nds.2007.07.001

Cited by 199 publications

(181 citation statements)

References 528 publications

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“…These results show that the 1413 keV transition has E3 character, while the 583 keV transition is E2 in nature. This confirms the previously established multipolarities [14], and also that the two assumptions listed above are valid.…”

Section: Resultssupporting

confidence: 91%

Study of²⁰⁷Tl₁₂₆Produced in Deep-Inelastic Reactions

Wilson

Podolyák

Fornal

et al. 2014

EPJ Web of Conferences

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Abstract. Deep-inelastic collisions of a 208 Pb beam on a 208 Pb target were performed using the ATLAS accelerator at Argonne National Laboratory. The Gammasphere detector array was used for the detection of prompt and delayed gamma-rays of the reaction products. 207 Tl is one proton away from the 208 Pb doubly-magic nucleus. Its low-energy level structure is dominated by the single proton-hole states πs −1 1/2 , πd −1 3/2 , and πh −1 11/2 . The 11/2 − state is isomeric with T 1/2 = 1.33(11) s. The reaction partner of 207 Tl is 209 Bi, which has a relatively well established level scheme compared to 207 Tl. Cross-coincidences between these two nuclei were used to confirm or establish levels above the 11/2 − isomeric state in 207 Tl. These states are obtained via breaking of the neutron core. Angular correlation analysis was performed on known transitions in 208 Pb, proving the applicability of this method for multipolarity assignment.

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Section: Resultssupporting

confidence: 91%

Study of²⁰⁷Tl₁₂₆Produced in Deep-Inelastic Reactions

Wilson

Podolyák

Fornal

et al. 2014

EPJ Web of Conferences

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“…Similarly good agreement is obtained when comparing the majority of the current results with those of the parallel study [10], particularly for the 8 + state in 208 Po [35] ( A = 30), where the measurements lie within the uncertainty limits.…”

Section: A Analysis Of Isomeric Ratiossupporting

confidence: 82%

Population of high-spin isomeric states following fragmentation of238U

Bowry¹,

Podolyák²,

Piétri³

et al. 2013

Phys. Rev. C

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Isomeric ratios have been determined for 23 metastable states identified in A ≈ 200 nuclei from Pt to Rn near the valley of stability following fragmentation of 238 U. This includes high-spin states with angular momenta ranging from (39/2)h to 25h. The experimental results are discussed together with those of similar experiments performed in this mass region. Isomeric ratios are compared with theoretical predictions where the angular momentum of the fragment arises purely due to the angular momentum of nucleons removed from the projectile. The theoretical yield of low-spin states is generally overestimated. In these cases the assumption of 100% feeding of the isomer may require modification. However, the yield of high-spin isomeric states [I m (39/2)h] is significantly underestimated and highlights the requirement for a more complete theoretical framework in relation to the generation of fragment angular momentum. The enhanced population of high-spin states reported here is advantageous to future studies involving isomeric beams at fragmentation facilities such as the Rikagaku Kenkyusho RI Beam Factory (Japan) and next-generation facilities at the Facility for Antiproton and Ion Research (Germany) and Facility for Rare Isotope Beams (USA).

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“…Taking the M 1 matrix element from the low-lying "spin-flip" B(M 1 : 4 + → 5 + ) = 2.1(3) W.u. [28] in 208 Tl and the neutron-rearrangement E2 matrix element from the 210 Pb core B(E2 : 4 + → 2 + ) = 4.8(9) W.u. [25], and scaling for mass, conversion, and γ-ray energies, one estimates the E2 branch to be 1.1 %, consistent with the experimentally observed branching ratio 2.6(16) %.…”

Section: The 986 Kev and 1043 Kev Statesmentioning

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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Nuclear Data Sheets for A = 208

Cited by 199 publications

References 528 publications

Study of²⁰⁷Tl₁₂₆Produced in Deep-Inelastic Reactions

Study of²⁰⁷Tl₁₂₆Produced in Deep-Inelastic Reactions

Population of high-spin isomeric states following fragmentation of238U

γ -ray spectroscopy of Tl209

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Nuclear Data Sheets for A = 208

Cited by 199 publications

References 528 publications

Study of207Tl126Produced in Deep-Inelastic Reactions

Study of207Tl126Produced in Deep-Inelastic Reactions

Population of high-spin isomeric states following fragmentation of238U

γ -ray spectroscopy of Tl209

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Study of²⁰⁷Tl₁₂₆Produced in Deep-Inelastic Reactions

Study of²⁰⁷Tl₁₂₆Produced in Deep-Inelastic Reactions