Precision Measurement of the First Ionization Potential of Nobelium

Chhetri, P.; Ackermann, D.; Backe, H.; Block, M.; Cheal, B.; Droese, C.; Düllmann, Ch. E.; Even, J.; Ferrer, R.; Giacoppo, F.; Götz, Stefan; Heßberger, F. P.; Huyse, M.; Kaleja, O.; Khuyagbaatar, J.; Kunz, P.; Laatiaoui, M.; Lautenschläger, F.; Lauth, W.; Lecesne, N.; Lens, L.; Ramirez, E. Minaya; Mistry, A.; Raeder, S.; Duppen, P. Van; Walther, Thomas; Yakushev, A.; Zhang, Z.

doi:10.1103/physrevlett.120.263003

Cited by 62 publications

(44 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Experimental studies giving direct information about the electronic shell structure are only available up to the heaviest actinides including Fm, No, and Lr (Chhetri et al, 2017(Chhetri et al, , 2018Laatiaoui et al, 2016;Raeder et al, 2018;Sato et al, 2015;Sewtz et al, 2003).…”

Section: A Atomic and Chemical Properties Of Superheavy Elements: Exmentioning

confidence: 99%

Colloquium : Superheavy elements: Oganesson and beyond

et al. 2019

View full text Add to dashboard Cite

During the last decade, six new superheavy elements were added into the seventh period of the periodic table, with the approval of their names and symbols. This milestone was followed by proclaiming 2019 the International Year of the Periodic Table of Chemical Elements by the United Nations General Assembly. According to theory, due to their large atomic numbers, the new arrivals are expected to be qualitatively and quantitatively different from lighter species. The questions pertaining to superheavy atoms and nuclei are in the forefront of research in nuclear and atomic physics, and chemistry. This Colloquium offers a broad perspective on the field and outlines future challenges. References

show abstract

Section: A Atomic and Chemical Properties Of Superheavy Elements: Exmentioning

confidence: 99%

Colloquium : Superheavy elements: Oganesson and beyond

et al. 2019

View full text Add to dashboard Cite

show abstract

“…These reflect the difficulties in the theoretical understanding of the fundamental mechanism responsible for low-energy electron attachment in these systems leading to stable negative ion formation. Incidentally, the binding energy (BE) of the least-bound electron in nobelium, corresponding to the first ionization potential, has recently been determined experimentally with high precision (Chhetri et al, 2018). However, to our knowledge no such experimental determination of the EAs of the actinide atoms has been reported.…”

Section: Introductionmentioning

confidence: 99%

Negative Ion Formation in Low-Energy Electron Collisions with the Actinide Atoms Th, Pa, U, Np and Pu

Felfli¹,

Msezane²

2019

APR

View full text Add to dashboard Cite

Here we investigate ground and metastable negative ion formation in low-energy electron collisions with the actinide atoms Th, Pa, U, Np and Pu through the elastic total cross sections (TCSs) calculations. For these atoms, the presence of two or more open d-and f-subshell electrons presents a formidable computational task for conventional theoretical methods, making it difficult to interpret the calculated results. Our robust Regge pole methodology which embeds the crucial electron correlations and the vital core-polarization interaction is used for the calculations. These are the major physical effects mostly responsible for stable negative ion formation in low-energy electron scattering from complex heavy systems. We find that the TCSs are characterized generally by Ramsauer-Townsend minima, shape resonances and dramatically sharp resonances manifesting ground and metastable negative ion formation during the collisions. The extracted from the ground states TCSs anionic binding energies (BEs) are found to be 3.09eV, 2.98eV, 3.03eV, 3.06eV and 3.25eV for Th, Pa, U, Np and Pu, respectively. Interestingly, an additional polarization-induced metastable TCS with anionic BE value of 1.22eV is generated in Pu due to the size effect. We also found that our excited states anionic BEs for several of these atoms compare well with the existing theoretical electron affinities including those calculated using the relativistic configuration-interaction method. We conclude that the existing theoretical calculations tend to identify incorrectly the BEs of the resultant excited anionic states with the electron affinities of the investigated actinide atoms; this demonstrates the great need for experimental verification and unambiguous determination of their electron affinities.

show abstract

“…complex atomic spectra of midshell elements, most notably in the lanthanide and actinide series with an additional open f subshell. Usually the analysis of Rydberg series allows a determination of the ionization potential with a precision in the range of 10 −5 eV, as demonstrated for a number of radioactive elements, e.g., Tc [18], Ac [19], Po [20,21], At [22], or No [23]. However, the identification of Rydberg states becomes increasingly difficult with the occurrence of strong configuration mixing in complex atomic systems, up to a point where an unambiguous level assignment is not possible anymore.…”

Section: Introductionmentioning

confidence: 99%

Atomic transitions and the first ionization potential of promethium determined by laser spectroscopy

et al. 2019

View full text Add to dashboard Cite

The atomic spectrum of neutral promethium has been studied extensively by laser resonance ionization spectroscopy. We report on more than 1000 atomic transitions in the blue and near infrared spectral ranges, most of them between high excited energy levels. As Rydberg convergences could not be assigned unambiguously in the dense spectrum at high excitation energies, the first ionization potential (IP) was determined via field ionization of weakly bound states within a static electric field. By applying the saddle-point model, a value of IP (Pm) = 45 020.8(3) cm −1 [5.58188(4) eV] was derived, which confirms previous expectations of 45 027(80) and 44 985(140) cm −1 , which were obtained indirectly from lanthanide IP systematics.

show abstract

Precision Measurement of the First Ionization Potential of Nobelium

Cited by 62 publications

References 34 publications

Colloquium : Superheavy elements: Oganesson and beyond

Colloquium : Superheavy elements: Oganesson and beyond

Negative Ion Formation in Low-Energy Electron Collisions with the Actinide Atoms Th, Pa, U, Np and Pu

Atomic transitions and the first ionization potential of promethium determined by laser spectroscopy

Contact Info

Product

Resources

About