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論文

Laser-assisted decay spectroscopy and mass spectrometry of $$^{178}$$Au

Cubiss, J. G.*; Andreyev, A. N.; Barzakh, A. E.*; Manea, V.*; Al Monthery, M.*; Althubiti, N. A.*; Andel, B.*; Antalic, S.*; 他39名*

Physical Review C, 102(4), p.044332_1 - 044332_12, 2020/10

https://doi.org/10.1103/PhysRevC.102.044332
 被引用回数：7 パーセンタイル：52.72(Physics, Nuclear)

A comprehensive study of the isotope $$^{178}$$Au has been made at the CERN-ISOLDE facility, using resonance laser ionization. Two long-lived states in $$^{178}$$Au were identified - a low-spin ground state and a high-spin isomer - each of which were produced as pure beams. Using the ISOLTRAP precision Penning trap, the excitation energy of the isomeric state in $$^{178}$$Au was determined to be $$E^{*} = $$ 189(14) keV. The $$alpha$$-decay fine structure patterns of the two states were studied using the Windmill decay station, providing information on the low-lying states in the daughter nucleus $$^{174}$$Ir. Nuclear spin assignments of $$I(^{178}$$Au$$^{g}) = (2,3)$$ and $$I(^{178}$$Au$$^{m}) = (7,8)$$ are made based on the observed $$beta$$-decay feeding and hyperfine structure intensity patterns.

論文

Inverse odd-even staggering in nuclear charge radii and possible octupole collectivity in $$^{217,218,219}$$At revealed by in-source laser spectroscopy

Barzakh, A. E.*; Cubiss, J. G.*; Andreyev, A. N.; Seliverstov, M. D.*; Andel, B.*; Antalic, S.*; Ascher, P.*; Atanasov, D.*; Beck, D.*; Biero$'n$, J.*; et al.

Physical Review C, 99(5), p.054317_1 - 054317_9, 2019/05

https://doi.org/10.1103/PhysRevC.99.054317
 被引用回数：12 パーセンタイル：77.09(Physics, Nuclear)

Hyperfine-structure parameters and isotope shifts for the 795-nm atomic transitions in $$^{217,218,219}$$At have been measured at CERN-ISOLDE, using the in-source resonance-ionization spectroscopy technique. Magnetic dipole and electric quadrupole moments, and changes in the nuclear mean-square charge radii, have been deduced. A large inverse odd-even staggering in radii, which may be associated with the presence of octupole collectivity, has been observed. Namely, the radius of the odd-odd isotope $$^{218}$$At has been found to be larger than the average.

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