Research output: Contribution to journal › Article
Charge radii and electromagnetic moments of 195-211At. / Popescu, Lucia-Ana (Peer reviewer); James G., Cubiss; Barzakh, A.; Seliverstov, Maxim; Andreyev, Andrei N.; Bujanic, Andelko; Antalic, Stanislav; Ascher, Philippe; Atanasov, D.; Beck, D.; J., Bieron; Blaum, K.; Borgmann, Ch.; Breitenfeldt, Martin; Capponi, L.; Cocolios, Thomas Elias; Day Goodacre, T.; Derkx, X.; De Witte, Hilde; Elseviers, Jytte; Fedorov, D; Fedosseev, Valentin N.; Fritzsche, S.; Gaffney, Liam Paul; George, S.; Ghys, Lars; Hessberger, F. P.; Huyse, Mark; Imai, N.; Kalaninova, Z.; Kisler, D.; Koester, Ulli; Kowalska, M.; Kreim, S.; Lane, Joseph; Liberati, Valentina; Lunney, D.; Lynch, Kara M; Manea, V.; Marsh, Bruce A; Mitsuoka, S.; Molkanov, P.L.; Nagame, Y.; Neidherr, D.; Nishio, K.; Ota, S.; Pauwels, Dieter; Popescu, Lucia-Ana; Radulov, Deyan; Rapisarda, Elisa; Revill, J. P.; Rosenbusch, M.; Rossel, R.E.; Rothe, S.; Sandhu, K.; Schweikhard, L.; Sels, Simon; Truesdale, V.L.; Van Beveren, Celine; Van den Bergh, Paul; Wakabayashi, Y.; Van Duppen, Piet; Wendt, K.; Wienholtz, F.; Whitmore, B. W. ; Wilson, G. L.; Wolf, R.N.; Zuber, K.
In: Physical Review C, Vol. 97, No. 054327, 054327, 29.05.2018, p. 1-19.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Charge radii and electromagnetic moments of 195-211At
AU - James G., Cubiss
AU - Barzakh, A.
AU - Seliverstov, Maxim
AU - Andreyev, Andrei N.
AU - Bujanic, Andelko
AU - Antalic, Stanislav
AU - Ascher, Philippe
AU - Atanasov, D.
AU - Beck, D.
AU - J., Bieron
AU - Blaum, K.
AU - Borgmann, Ch.
AU - Breitenfeldt, Martin
AU - Capponi, L.
AU - Cocolios, Thomas Elias
AU - Day Goodacre, T.
AU - Derkx, X.
AU - De Witte, Hilde
AU - Elseviers, Jytte
AU - Fedorov, D
AU - Fedosseev, Valentin N.
AU - Fritzsche, S.
AU - Gaffney, Liam Paul
AU - George, S.
AU - Ghys, Lars
AU - Hessberger, F. P.
AU - Huyse, Mark
AU - Imai, N.
AU - Kalaninova, Z.
AU - Kisler, D.
AU - Koester, Ulli
AU - Kowalska, M.
AU - Kreim, S.
AU - Lane, Joseph
AU - Liberati, Valentina
AU - Lunney, D.
AU - Lynch, Kara M
AU - Manea, V.
AU - Marsh, Bruce A
AU - Mitsuoka, S.
AU - Molkanov, P.L.
AU - Nagame, Y.
AU - Neidherr, D.
AU - Nishio, K.
AU - Ota, S.
AU - Pauwels, Dieter
AU - Popescu, Lucia-Ana
AU - Radulov, Deyan
AU - Rapisarda, Elisa
AU - Revill, J. P.
AU - Rosenbusch, M.
AU - Rossel, R.E.
AU - Rothe, S.
AU - Sandhu, K.
AU - Schweikhard, L.
AU - Sels, Simon
AU - Truesdale, V.L.
AU - Van Beveren, Celine
AU - Van den Bergh, Paul
AU - Wakabayashi, Y.
AU - Van Duppen, Piet
AU - Wendt, K.
AU - Wienholtz, F.
AU - Whitmore, B. W.
AU - Wilson, G. L.
AU - Wolf, R.N.
AU - Zuber, K.
A2 - Popescu, Lucia-Ana
N1 - Score=10
PY - 2018/5/29
Y1 - 2018/5/29
N2 - Hyperfine-structure parameters and isotope shifts of 195–211At have been measured for the first time at CERN-ISOLDE, using the in-source resonance-ionization spectroscopy method. The hyperfine structures of isotopes were recorded using a triad of experimental techniques for monitoring the photo-ion current. The Multi-Reflection Time-of-Flight Mass Spectrometer, in connection with a high-resolution electron multiplier, was used as an ion-counting setup for isotopes that either were affected by strong isobaric contamination or possessed a long half-life; the ISOLDE Faraday cups were used for cases with high-intensity beams; and the Windmill decay station was used for short-lived, predominantly α-decaying nuclei. The electromagnetic moments and changes in the mean-squarecharge radii of the astatine nuclei have been extracted from the measured hyperfine-structure constants and isotope shifts. This was only made possible by dedicated state-of-the-art large-scale atomic computations of the electronic factors and the specific mass shift of atomic transitions in astatine that are needed for these extractions. By comparison with systematics, it was possible to assess the reliability of the results of these calculations and their ascribed uncertainties. A strong deviation in the ground-state mean-square charge radii of the lightest astatine isotopes, from the trend of the (spherical) lead isotopes, is interpreted as the result of an onset of deformation. This behavior bears a resemblance to the deviation observed in the isotonic polonium isotopes. Cases for shape coexistence have been identified in 197,199At, for which a significant difference in the charge radii for ground (9/2−) and isomeric (1/2+) states has been observed.
AB - Hyperfine-structure parameters and isotope shifts of 195–211At have been measured for the first time at CERN-ISOLDE, using the in-source resonance-ionization spectroscopy method. The hyperfine structures of isotopes were recorded using a triad of experimental techniques for monitoring the photo-ion current. The Multi-Reflection Time-of-Flight Mass Spectrometer, in connection with a high-resolution electron multiplier, was used as an ion-counting setup for isotopes that either were affected by strong isobaric contamination or possessed a long half-life; the ISOLDE Faraday cups were used for cases with high-intensity beams; and the Windmill decay station was used for short-lived, predominantly α-decaying nuclei. The electromagnetic moments and changes in the mean-squarecharge radii of the astatine nuclei have been extracted from the measured hyperfine-structure constants and isotope shifts. This was only made possible by dedicated state-of-the-art large-scale atomic computations of the electronic factors and the specific mass shift of atomic transitions in astatine that are needed for these extractions. By comparison with systematics, it was possible to assess the reliability of the results of these calculations and their ascribed uncertainties. A strong deviation in the ground-state mean-square charge radii of the lightest astatine isotopes, from the trend of the (spherical) lead isotopes, is interpreted as the result of an onset of deformation. This behavior bears a resemblance to the deviation observed in the isotonic polonium isotopes. Cases for shape coexistence have been identified in 197,199At, for which a significant difference in the charge radii for ground (9/2−) and isomeric (1/2+) states has been observed.
KW - laser spectroscopy
KW - ISOLDE
KW - astatine
UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/30009493
U2 - 10.1103/PhysRevC.97.054327
DO - 10.1103/PhysRevC.97.054327
M3 - Article
VL - 97
SP - 1
EP - 19
JO - Physical Review C
JF - Physical Review C
SN - 0556-2813
IS - 054327
M1 - 054327
ER -
ID: 4272338