First Online Mass Measurements of Isobar Chains via Multi-Reflection Time-of-Flight Mass Spectrograph Coupled with GARIS-II

Abstract

Using a mulit-reflection time-of-flight mass spectrograph (MRTOF-MS) located after a gas cell coupled with the gas-filled recoil ion separator GARIS-II, the masses of several heavy nuclei have been directly and precisely measured. The nuclei were produced via fusion-evaporation reactions and separated from projectile-like and target-like particles using GARIS-II before being stopped in a helium-filled gas cell. Time-of-flight spectra for three isobar chains, 205Fr-205Rn-205At-205Po, 206Fr-206Rn-206At and 201Rn-201At-201Po-201Bi, were observed. Precision atomic mass values were determined for 205,206Fr, 201At, and 201Po.

5 pages, 2 figures

References in corpus (4)

• Single-reference high-precision mass measurement with a multi-reflection time-of-flight mass spectrograph
• Atomic mass measurements of short-lived nuclides around the doubly-magic 208Pb
• A novel ion cooling trap for multi-reflection time-of-flight mass spectrograph
• Wide-band mass measurements with a multi-reflection time-of-flight mass spectrograph

Cited by in corpus (7)

• Improving wide-band mass measurements in a multi-reflection time-of-flight mass spectrograph by usage of a concomitant measurement scheme
• New mass anchor points for neutron-deficient heavy nuclei from direct mass measurements of radium and actinium isotopes
• Atomic masses of intermediate-mass neutron-deficient nuclei with relative uncertainty down to 35-ppb via multireflection time-of-flight mass spectrograph
• Design of a Multiple-Reflection Time-of-Flight Mass-Spectrometer for Barium-tagging
• Development of an "$\alpha$-ToF" detector for correlated measurement of atomic masses and decay properties
• Nuclear Mass Measurements With Radioactive Ion Beams
• Reduction of contaminants originating from primary beam by improving the beam stoppers in GARIS-II