Internal conversion and summing effects in heavy-nuclei spectroscopy

Theisen, Ch.; Лопез-Мартенс, А.; Bonnelle, C.

doi:10.1016/j.nima.2008.02.044

Cited by 15 publications

(8 citation statements)

References 20 publications

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“…This experimental phenomenon was previously addressed in Refs. [24,25]. In the present work, some of the α-decay branches populate excited states in the daughter nucleus, with the subsequent transitions proceeding by internal conversion, as well as γ -ray emission.…”

Section: B α-Particle Conversion-electron Energy Summingmentioning

confidence: 72%

Excited states in Ra217 populated in the α decay of Th221

Parr¹,

Smith²,

Greenlees³

et al. 2020

Phys. Rev. C

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Fine structure in the α decay of 221 90 Th, populating excited states in 217 88 Ra, was studied using αγ -coincidence spectroscopy. Two α-decay branches from 221 Th have been newly observed, with E α (keV)[b α (%)] = 7951(8)[0.14(3)] and 8247(3)[1.51( 12)], together with three previously known branches. Also, two new states in 217 Ra were identified at E = 177 and 227 keV. The ground-state configurations of the odd-A, N = 131 transitional isotones above 208 Pb are interpreted from their α-decay fine structure systematics and considered in terms of predictions using spherical shell and reflection-asymmetric models.

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Section: B α-Particle Conversion-electron Energy Summingmentioning

confidence: 72%

Excited states in Ra217 populated in the α decay of Th221

Parr¹,

Smith²,

Greenlees³

et al. 2020

Phys. Rev. C

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“…This issue and its implications on measured α-decay branching ratios are discussed in detail in, e.g., Refs. [40,41]. Although this effect is not avoided in the present experiment, it is taken into account by the simulation: Fig.…”

Section: E Remaining Remarksmentioning

confidence: 89%

“…However, a complete simulation of the physical process and the detector geometry with, e.g., GEANT4 allows for accurate treatment of the energy summing (see, e.g., Ref. [41]). …”

Section: E Remaining Remarksmentioning

confidence: 99%

Quantum-state-selective decay spectroscopy of Ra213

et al. 2017

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General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal An experimental scheme combining the mass resolving power of a Penning trap with contemporary decay spectroscopy has been established at GSI Darmstadt. The Universal Linear Accelerator (UNILAC) at GSI Darmstadt provided a 48 Ca beam impinging on a thin 170 Er target foil. Subsequent to velocity filtering of reaction products in the Separator for Heavy Ion reaction Products (SHIP), the nuclear ground state of the 5n evaporation channel 213 Ra was mass-selected in SHIPTRAP, and the 213 Ra ions were finally transferred into an array of silicon strip detectors surrounded by large composite germanium detectors. Based on comprehensive GEANT4 simulations and supported by theoretical calculations, the spectroscopic results call for a revision of the decay path of 213 Ra, thereby exemplifying the potential of a combination of a mass-selective Penning trap device with a dedicated nuclear decay station and contemporary GEANT4 simulations.

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“…4(c) may exhibit this origin. It is noteworthy that the response of the implantation detector involves the energy of the emitted internal-conversion electron summed with the energy released in the subsequent atomic relaxation via low-energy x rays or Auger electrons as the atomic vacancies created by the internal-conversion decays are filled [37,38]. These atomic phenomena were accounted for as the transition energies were deduced.…”

Section: A Internal Decay Of the Isomermentioning

confidence: 99%

Isomeric 132+ (νi132−1) sta

Auranen¹,

Uusitalo²,

Badran³

et al. 2021

Phys. Rev. C

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Using a fusion-evaporation reaction and a gas-filled recoil separator, an isomeric state [T1 2 = 83( 8) μs] with a most likely spin and parity of 13 2 + has been identified in 211 Th. The isomeric state is mainly depopulated via a hindered internal M2 transition [B(M2) = 0.0025(5) W.u.], but also a weak α-decay branch of 4(3)% was observed. The present observations fit well to the systematic pattern set by the previously identified states of the same spin and parity in this region of the nuclear chart.

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Internal conversion and summing effects in heavy-nuclei spectroscopy

Cited by 15 publications

References 20 publications

Excited states in Ra217 populated in the α decay of Th221

Excited states in Ra217 populated in the α decay of Th221

Quantum-state-selective decay spectroscopy of Ra213

Isomeric 132+ (νi132−1) sta

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