Science - USA (2022-03-04)

phase shifter), which predicts that the maxi- mum loss is larger than the universal limit. We therefore extended our model by co ...

of the simple model: Analysis of the inelastic scattering provides a full description of all s- wave scattering properties, incl ...

ASTEROIDS Pebbles and sand on asteroid (162173) Ryugu: In situ observation and particles returned to Earth S. Tachibana1,2*, H. ...

similar to, but distinct from, those of the sur- face ( 15 ). The crater and excavated material have a slightly higher abundance ...

are ejecta produced by the projectile impact. The ejected particles identified near the rocket coupling ring (an assembly used d ...

lengths—the distance between two parallel lines tangential to the surface—of the maximum-area projection of each particle andSas ...

chamber A was lifted by the projectile firing, which worked efficiently to collect asteroid surface regolith. This is unlike the ...

and C are the samples acquired in the TD1 and TD2 operations, respectively. More than 200 pebbles (1 to 10 mm in size) from cham ...

REPORTS ◥ TOPOLOGICAL PHYSICS A synthetic monopole source of Kalb-Ramond field in diamond Mo Chen (陈墨)1,2†‡, Changhao Li1,3‡, Gi ...

into a three-level Weyl-type HamiltonianH^ 4 D ðÞqx;qy;qz;qw defined over a 4D parameter space H^ 4 D¼ 0 qxiqy 0 qxþiqy 0 qzþiqw ...

two microwave tones, andH 0 cosa,H 0 sinaare their corresponding microwave amplitudes ( 20 ). This Hamiltonian has three eigenst ...

which provides an estimation of theDDin- variant in Eq. 3 and signals the presence of the tensor monopole at the center of our p ...

CATALYSIS Elongation and branching ofa-olefins by two ethylene molecules Thomas Dietel, Fabian Lukas, Winfried P. Kretschmer, Rh ...

activity of 3 after treatment with ammonium borate (Fig. 1C) revealed an increase of the a-value or a decrease of the 1-butene s ...

SCIENCEscience.org 4 MARCH 2022¥VOL 375 ISSUE 6584 1023 Fig. 2. Catalytic reaction ofa-olefins and ethylene.(A) Temperature depe ...

isshowninFig.1D.Afterasmallinitialde- crease of the ethylene consumption, a linear profile indicates almost no catalyst decay. W ...

MAGNETISM Topological magnon band structure of emergent Landau levels in a skyrmion lattice T. Weber^1 *, D. M. Fobes^2 , J. Wai ...

kSkLis the magnitude of the reciprocal primi- tive vectors (Fig. 1D). Noted on the right side are the band indexnand the Chern n ...

plane in the vicinity of the nuclear [110] Bragg reflection (i.e.,G[110]= [110]; see the schematic depictions in Figs. 2, 3, and ...

Typical energy scans at various values ofq⊥ are shown in Fig. 2, B1, B2, C1, and C2. The corresponding calculated magnon spectra ...