[en] By means of (¹⁶O, 5n) reaction, evidence is given for a decoupled band in ¹⁸⁷Pt and a strongly coupled one in ¹⁸⁵Pt. This can be explained by a transition between oblate and prolate shapes. Moreover, in ¹⁸⁷Pt, levels observed by radioactivity studies allow to predict the coexistence of prolate shape at low energy

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[en] The appearance of a decoupled band in ¹⁸⁷Pt and a normal band in ¹⁸⁵Pt from the ¹⁷⁴Yb, ¹⁷⁶Yb (¹⁶O,5n) reaction allows a shape transition from oblate to prolate to be predicted between these two nuclei

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[en] A new technique is proposed for designing a low-scattering 2 × 2 antenna array using strategic coding metasurface ground for wideband bistatic and monostatic backscattered energy level reduction. Two various artificial magnetic conductor (AMC) units cells are organized like a chessboard to obtain an effective 180° ± 37° reflection phase difference over a broadband frequency range. The low-backscattering microstrip antenna array is achieved based on the destructive interference theory and diffusion property of AMC unit cells. Simulations show that the proposed antenna array has a considerable backscattering field level reduction of 4.7–18 GHz for both the x- and y-polarization incident waves. It should also be noted that the maximum reduction of backscattered energy at a frequency of 7.2 GHz is -18 dB. The bistatic backscattering performance of the antenna is also given at different frequencies. Both a reference and a proposed prototype are fabricated, and the results are analyzed. Measurements of the fabricated prototype coincide well with simulations. © 2021 Wiley-VCH GmbH

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[en] The observed transition in the spontaneous fission mass distribution from asymmetry in the lighter Fm isotopes to symmetry in the heavier Fm isotopes is studied on the basis of the potential energy surfaces (PES) and fragment shell effects in the two-center shell model. To that end, we have calculated the PES for ²⁵⁶Fm and compared them with our previous PES results for other Fm isotopes. Our calculations show that the lighter Fm isotopes (up to ²⁵⁶Fm) should fission asymmetrically, while ²⁵⁸Fm and other heavier Fm isotopes should fission symmetrically. This is due to the fact that the shell corrections in these nuclei are found to increase with increasing mass number and decreasing neck radius, particularly in the region beyond the second barrier. This, in turn, is a consequence of strong shell effects in fragment nuclei near the doubly closed-shell ¹³²₅₀Sn₈₂. The results supporting these conclusions are shown

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