Resonance laser ionization spectroscopy of stable chromium isotopes

Abstract

Resonance laser ionization spectroscopy was conducted on stable chromium isotopes Cr50,52,53,54 using the RILIS laser ion source and the CRIS experimental apparatus at the ISOLDE/CERN facility. A unique titanium:sapphire laser-based three-step laser ionization scheme was developed to selectively and efficiently ionize and extract the Cr isotopes. Over 350 electronic transitions were observed, including several efficient transitions to autoionizing states. High-resolution spectroscopic measurements were performed with the 3d5(6S)4s a7S3→3d5(6S)4p z7P3 atomic ground-state transition to characterize the scheme and benchmark the performance of the CRIS setup. The isotope shifts δν50,52=−121(7)MHz, δν50,53=−137(6)MHz, and δν54,52=−14(6)MHz were measured, and the hyperfine structure parameter AS3=−82.64(16)MHz of Cr53 was extracted. A King plot analysis allowed reevaluation of the field shift F=−271(11)MHzfm−2 and mass shift M=105.3(30)GHzu factors of the transition with improved precision and accuracy. High-resolution measurements agree with the existing literature, supporting the accuracy and the reliability of the method for future studies involving radioactive isotopes.

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BibTeX

@article{lalanne2026resonance,
  title = {{Resonance laser ionization spectroscopy of stable chromium isotopes}},
  author = {L Lalanne and R Mancheva and M Athanasakis-Kaklamanakis and M Heines and Á Koszorús and Y.C Liu and J Reilly and C Bernerd and B van den Borne and K Chrysalidis and T.E Cocolios and K.T Flanagan and R.F. Garcia Ruiz and R.P de Groote and R Heinke and J Johnson and P Lassegues and K Mack and B.A Marsh and A Mcglone and K.M Lynch and G Neyens and R van Duyse and J Wessolek and X.F Yang},
  journal = {Physical Review A},
  year = {2026},
  month = oct,
  doi = {10.1103/4kpl-b7cs},
  url = {https://hal.science/hal-05758324v1},
  note = {CC BY 4.0},
}

RIS

TY  - JOUR
TI  - Resonance laser ionization spectroscopy of stable chromium isotopes
AU  - L Lalanne
AU  - R Mancheva
AU  - M Athanasakis-Kaklamanakis
AU  - M Heines
AU  - Á Koszorús
AU  - Y.C Liu
AU  - J Reilly
AU  - C Bernerd
AU  - B van den Borne
AU  - K Chrysalidis
AU  - T.E Cocolios
AU  - K.T Flanagan
AU  - R.F. Garcia Ruiz
AU  - R.P de Groote
AU  - R Heinke
AU  - J Johnson
AU  - P Lassegues
AU  - K Mack
AU  - B.A Marsh
AU  - A Mcglone
AU  - K.M Lynch
AU  - G Neyens
AU  - R van Duyse
AU  - J Wessolek
AU  - X.F Yang
PY  - 2026
DA  - 2026/10/29
JO  - Physical Review A
DO  - 10.1103/4kpl-b7cs
UR  - https://hal.science/hal-05758324v1
AB  - Resonance laser ionization spectroscopy was conducted on stable chromium isotopes Cr50,52,53,54 using the RILIS laser ion source and the CRIS experimental apparatus at the ISOLDE/CERN facility. A unique titanium:sapphire laser-based three-step laser ionization scheme was developed to selectively and efficiently ionize and extract the Cr isotopes. Over 350 electronic transitions were observed, including several efficient transitions to autoionizing states. High-resolution spectroscopic measurements were performed with the 3d5(6S)4s a7S3→3d5(6S)4p z7P3 atomic ground-state transition to characterize the scheme and benchmark the performance of the CRIS setup. The isotope shifts δν50,52=−121(7)MHz, δν50,53=−137(6)MHz, and δν54,52=−14(6)MHz were measured, and the hyperfine structure parameter AS3=−82.64(16)MHz of Cr53 was extracted. A King plot analysis allowed reevaluation of the field shift F=−271(11)MHzfm−2 and mass shift M=105.3(30)GHzu factors of the transition with improved precision and accuracy. High-resolution measurements agree with the existing literature, supporting the accuracy and the reliability of the method for future studies involving radioactive isotopes.
SN  - 2469-9926
SN  - 2469-9934
ER  -

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