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論文

Shapes of $$^{192,190}$$Pb ground states from $$beta$$-decay studies using the total-absorption technique

Est$'e$vez Aguado, M. E.*; Algora, A.*; Agramunt, J.*; Rubio, B.*; Tain, J. L.*; Jord$'a$n, D.*; Fraile, L. M.*; Gelletly, W.*; Frank, A.*; Csatl$'o$s, M.*; et al.

Physical Review C, 92(4), p.044321_1 - 044321_8, 2015/10

https://doi.org/10.1103/PhysRevC.92.044321
 被引用回数：16 パーセンタイル：68.00(Physics, Nuclear)

The $$beta$$ decay of $$^{192,190}$$Pb has been studied using the total absorption technique at the ISOLDE (CERN) facility. The $$beta$$-decay strength deduced from the measurements, combined with QRPA theoretical calculations, allow us to infer that the ground states of the $$^{192,190}$$Pb isotopes are spherical. These results represent the first application of the shape determination method using the total absorption technique for heavy nuclei and in a region where there is considerable interest in nuclear shapes and shape effects.

論文

Low-velocity transient-field technique with radioactive ion beams; $$g$$ factor of the first excited $$2^+$$ state in $$^{72}$$Zn

Illana, A.*; Jungclaus, A.*; Orlandi, R.; Perea, A.*; Bauer, C.*; Briz, J. A.*; Egido, J. L.*; Gernh$"a$user, R.*; Leske, J.*; M$"u$cher, D.*; et al.

Physical Review C, 89(5), p.054316_1 - 054316_11, 2014/05

https://doi.org/10.1103/PhysRevC.89.054316
 被引用回数：11 パーセンタイル：57.28(Physics, Nuclear)

The $$g$$ factor of the first excited state in $$^{72}$$Zn was measured using the transient-field technique in combination with Coulomb excitation. The experiment was ran at REX-ISOLDE, CERN, and the $$gamma$$-ray perturbed angular correlations were measured using 4 triple Germanium clusters of the Miniball array. The experimental result $$g$$(2$$_1^{+}$$) = +0.47(14) is significant to establish the structure of the Zn isotopes near N=40. Comparison with shell-model calculations reveal that to reproduce the measured energies and B(E2) of the Zn isotopes around N=40, both the proton excitations from the $$f_{7/2}$$ orbit and neutron excitations into the $$g_{9/2}$$ and $$d_{5/2}$$ orbits are essential. Furthermore, beyond-mean-field calculations reveal the need to include the triaxial degree of freedom.

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