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論文

$$mu$$SR study on the noncentrosymmetric superconductor NbGe$$_2$$

Jiao, J. C.*; Chen, K. W.*; Hillier, A. D.*; 伊藤 孝; 髭本 亘; Li, Z.*; Lv, B.*; Xu, Z.-A.*; Shu, L.*

Physical Review B, 110(21), p.214516_1 - 214516_9, 2024/12

https://doi.org/10.1103/PhysRevB.110.214516
 被引用回数：0 パーセンタイル：0.00(Materials Science, Multidisciplinary)

We report on a muon spin relaxation ($$mu$$SR) study on the polycrystalline noncentrosymmetric superconductor NbGe$$_2$$ with superconducting transition temperature $$T_c$$ = 2.0-2.1 K. The zero-field $$mu$$SR experiment indicates the absence of a spontaneous magnetic field in the superconducting state, showing the preservation of time-reversal symmetry in the superconducting state. The transverse-field $$mu$$SR experiment is performed to map the phase diagram of NbGe$$_2$$, from which clear evidence of both type-I and type-II superconductivities is obtained. More importantly, we clearly delineate the region in the phase diagram where type-I and type-II superconductivities coexist.

論文

New excited 2$$^+$$ and 3$$^-$$ two-proton states in $$_{84}^{210}$$Po$$_{126}$$ populated by two-proton transfer

Dupont, E.*; Astier, A.*; Petrache, C. M.*; Lv, B. F.*; Deloncle, I.*; Kiener, J.*; Orlandi, R.; 牧井 宏之; 西尾 勝久; 廣瀬 健太郎; et al.

Physical Review C, 101(1), p.014309_1 - 014309_6, 2020/01

https://doi.org/10.1103/PhysRevC.101.014309
 被引用回数：2 パーセンタイル：20.23(Physics, Nuclear)

Five new 2$$^+$$ levels and one new 3$$^-$$ level were established in $$^{210}$$Po. The states were populated via the $$^{208}$$Pb($$^{12}$$C, $$^{10}$$Be) two-proton reaction experiment, performed at the JAEA Tandem in Tokai. A setup combining Ge, LaBr$$_3$$, and Si telescopes was used to detect in-beam $$gamma$$-rays and ejectile residues. Two-proton configurations were assigned to all new states. All assignments are strongly supported by shell-model calculations.

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