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Atoms, Volume 11, Issue 10

October 2023 - 15 articles

Cover Story: CHIP-TRAP is the Central Michigan University High Precision Penning trap, which is being developed to perform ultra-high precision mass measurements on long-lived and stable isotopes for applications in nuclear and neutrino physics and in fundamental physics studies. CHIP-TRAP will utilize ions from a laser ablation ion source and a newly developed Penning ion trap source. Ions will be filtered with a multi-reflection time-of-flight mass separator and a cylindrical capture trap before being captured in a pair of hyperbolic geometry Penning traps in a 12 T magnetic field. Mass ratios will be determined via simultaneous cyclotron frequency measurements on pairs of ions in the two traps using a phase-sensitive image charge detection technique. This will significantly reduce uncertainty due to temporal magnetic field fluctuations. View this paper

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Article

1 Citations

2,637 Views

16 Pages

Status of CHIP-TRAP: The Central Michigan University High-Precision Penning Trap

Matthew Redshaw,
Ramesh Bhandari,
Nadeesha Gamage,
Mehedi Hasan,
Madhawa Horana Gamage,
Dakota K. Keblbeck,
Savannah Limarenko and
Dilanka Perera

Atoms2023, 11(10), 127;https://doi.org/10.3390/atoms11100127

7 October 2023

Precise and accurate atomic mass data provide crucial information for applications in a wide range of fields in physics and beyond, including astrophysics, nuclear structure, particle and neutrino physics, fundamental symmetries, chemistry, and metro...

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Article

2,136 Views

20 Pages

Applications of Machine Learning and Neural Networks for FT-ICR Mass Measurements with SIPT

Scott E. Campbell,
Georg Bollen,
Alec Hamaker,
Walter Kretzer,
Ryan Ringle and
Stefan Schwarz

Atoms2023, 11(10), 126;https://doi.org/10.3390/atoms11100126

28 September 2023

The single-ion Penning trap (SIPT) at the Low-Energy Beam Ion Trapping Facility has been developed to perform precision Penning trap mass measurements of single ions, ideal for the study of exotic nuclei available only at low rates at the Facility fo...

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Article

2,078 Views

13 Pages

Quadrupole Effects in the Photoionisation of Sodium 3s in the Vicinity of the Dipole Cooper Minimum

Nishita M. Hosea,
Jobin Jose,
Hari R. Varma,
Pranawa C. Deshmukh and
Steven T. Manson

Atoms2023, 11(10), 125;https://doi.org/10.3390/atoms11100125

28 September 2023

A procedure to obtain relativistic expressions for photoionisation angular distribution parameters using the helicity formulation is discussed for open-shell atoms. Electric dipole and quadrupole transition matrix elements were considered in the pres...

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Article

3 Citations

2,181 Views

15 Pages

Single Ionization of Helium by Protons of Various Energies in the Parabolic Quasi-Sturmians Approach

Alexander S. Zaytsev,
Darya S. Zaytseva,
Sergey A. Zaytsev,
Lorenzo U. Ancarani,
Ochbadrakh Chuluunbaatar,
Konstantin A. Kouzakov and
Yury V. Popov

Atoms2023, 11(10), 124;https://doi.org/10.3390/atoms11100124

28 September 2023

The parabolic quasi-Sturmian approach, recently introduced for the calculation of ion–atom ionizing collisions, is adapted and applied here to the single ionization of helium induced by an intermediate-energy proton impact. Within the method, t...

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Article

1 Citations

1,954 Views

15 Pages

The Double-Nozzle Technique Equipped with RF-Only Funnel and RF-Buncher for the Ion Beam Extraction into Vacuum

Victor Varentsov

Atoms2023, 11(10), 123;https://doi.org/10.3390/atoms11100123

22 September 2023

This study is a further development of our “Proposal of a new double-nozzle technique for in-gas-jet laser resonance ionization spectroscopy” paper published in the journal Atoms earlier this year. Here, we propose equipping the double-no...

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