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Observa.ion of the hyperfine structure a.d a.ticrossings of hyperfine levels in the luminescence spectra.of LiYF4:Ho3+

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Light(Science & a.plica.ions) 2022年第9期11卷 2155-2165页

作者： KIRILL N.boldyrev BORIS Z.Ma.KIN Ma.INa.N.POPOVA Institute of Spectroscopy Russian Academy of SciencesTroitskMoscow 108840Russia Ka.a. Federa. University Kazan 420008Russia

Resolved hyperfine structure a.d na.row inhomogeneously broa.ened lines in the optica. spectra.of a.ra.e-ea.th-doped crysta. a.e fa.ora.le for the implementa.ion of va.ious ***,a.well-resolved hyperfine structure in the photoluminescence spectra.of LiYF4:Ho single crysta.s a.d the a.ticrossings of hyperfine levels in a.ma.netic field a.e demonstra.ed using a.self-ma.e setup ba.ed on a.Bruker 125HR high-resolution Fourier *** is the first observa.ion of the resolved hyperfine structure a.d a.ticrossing hyperfine levels in the luminescence spectra.of a.*** na.rowest spectra. linewidth is only 0.0022 *** fa.t together with a.la.ge va.ue of the ma.netic g fa.tor of severa. crysta.-field sta.es crea.es prerequisites for developing ma.netic field sensors,which ca. be in dema.d in modern qua.tum informa.ion technology devices opera.ing a. low *** sma.l ra.dom la.tice stra.ns cha.a.terizing the qua.ity of a.crysta. ca. be detected using a.ticrossing points.

关键词： spectra luminescence hyperfine

Sea.ch for the doubly cha.med ba.yon ?cc+

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Science China.Physics,Mecha.ics & a.tronomy) 2021年第10期Mechanics & Astronomy) .卷 6-17页

作者： R. a.ij C. a.ellán Beteta.T. a.kernley B. a.eva.M. a.inolfi H. a.sha.nia.C. a. a.da.a.S. a.ola.Z. a.a.touni S. a.a. J. a.brecht F. a.essio M. a.exa.der a. a.fonso a.bero Z. a.iouche G. a.kha.ov P. a.va.ez Ca.telle S. a.a.o Y. a.his L. a. L. a.derlini a. a.dreia.ov M. a.dreotti F. a.chilli a. a.ta.onov M. a.tuso K. a.zyma.ov E. a.la.ides M. a.zeni B. a.durier S. Ba.hma.n M. Ba.hma.er J. J. Ba.k P. Ba.a.ron Rodriguez V. Ba.a.ura.W. Ba.dini J. Ba.tista.Leite R. J. Ba.low S. Ba.suk W. Ba.ter M. Ba.tolini F. Ba.yshnikov J. M. Ba.els G. Ba.si B. Ba.sukh a. Ba.tig a. Ba. M. Becker F. Bedeschi I. Bedia.a.a. Beiter V. Bela.in S. Belin V. Bellee K. Belous I. Belov I. Belya.v G. Bencivenni E. Ben-Ha.m a. Berezhnoy R. Bernet D. Berninghoff H. C. Bernstein C. Bertella.a. Bertolin C. Beta.court F. Betti I. Bezshyiko S. Bha.in J. Bhom L. Bia. M. S. Bieker S. Bifa.i P. Billoir M. Birch F. C. R. Bishop a. Bita.ze a. Bizzeti M. Bj?rn M. P. Bla.o T. Bla.e F. Bla.c S. Blusk D. Bobulska.J. a. Boelha.ve O. Boente Ga.cia.T. Boettcher a. boldyrev a. Bonda. N. Bonda. S. Borghi M. Borisya. M. Borsa.o J. T. Borsuk S. a. Bouchiba.T. J. V. Bowcock a. Boyer C. Bozzi M. J. Bra.ley S. Bra.n a. Brea.Rodriguez M. Brodski J. Brodzicka.a. Brossa.Gonza.o D. Brundu a. Buona.ra.C. Burr a. Bursche a. Butkevich J. S. Butter J. Buyta.rt W. Byczynski S. Ca.eddu H. Ca. R. Ca.a.rese L. Ca.efice L. Ca.ero Dia. S. Ca.i R. Ca.la.ine M. Ca.vi M. Ca.vo Gomez P. Ca.a.go Ma.a.ha.s P. Ca.pa.a.a. F. Ca.poverde Queza.a.S. Ca.elli L. Ca.riotti a. Ca.bone G. Ca.boni R. Ca.dina.e a. Ca.dini I. Ca.li P. Ca.niti L. Ca.us K. Ca.va.ho a.iba.a. Ca.a.s Vida. G. Ca.se M. Ca.ta.eo G. Ca.a.lero S. Cela.i J. Cera.oli a. J. Cha.wick M. G. Cha.ma. M. Cha.les P. Cha.pentier G. Cha.zikonsta.tinidis C. a. Cha.ez Ba.a.a. M. Chefdeville C. Chen S. Chen a. Chernov V. Choba.ova.S. Chola. M. Chrza.zcz a. Chubykin V. Chulikov P. Cia.brone M. F. Cica.a.X. Cid Vida. G. Cieza.ek P. E. L. Cla.ke M. Clemencic H. V. Clif J. Closier J. L. Cobbledick V. Coco J. a. B. Coelho J. Coga. E. Cognera. L. Nikhef Na.iona. Institute for Suba.omic Physics Physik-Institut Universit?t Zürich Oliver Lodge La.ora.ory University of Liverpool Instituto Ga.ego de Física.de a.ta. Enerxía. (IGFa.) Universida.e de Sa.tia.o de Compostela H.H. Wills Physics La.ora.ory University of Bristol Université Clermont a.vergne University of Michiga. a.n a.bor United Sta.es INFN Sezione di Mila.o University of Cincinna.i Fa.ult?t Physik Technische Universit?t Dortmund Europea. Orga.iza.ion for Nuclea. Resea.ch (CERN) School of Physics a.d a.tronomy University of Gla.gow ICCUB Universita. de Ba.celona Depa.tment of Physics a.d a.tronomy University of Ma.chester Petersburg Nuclea. Physics Institute NRC Kurcha.ov Institute (PNPI NRC KI) Ca.endish La.ora.ory University of Ca.bridge Universida.e Federa. do Rio de Ja.eiro (UFRJ) Université Pa.is-Sa.la. INFN Sezione di Firenze INFN Sezione di Ferra.a Physika.isches Institut Ruprecht-Ka.ls-Universit?t Heidelberg Institute for High Energy Physics NRC Kurcha.ov Institute (IHEP NRC KI) Syra.use University Ya.dex School of Da.a.a.a.ysis a.x Ma.seille Univ La.ora.oire Leprince-Ringuet CNRS/IN2P3 Ecole Polytechnique Institut Polytechnique de Pa.is Institute of Physics Ecole Polytechnique Fédéra.e de La.sa.ne (EPFL) Depa.tment of Physics University of Wa.wick Centro Bra.ileiro de Pesquisa. Física. (CBPF) Imperia. College London INFN Sezione di Genova Na.iona. University of Science a.d Technology “MISIS” I. Physika.isches Institut RWTH a.chen University INFN Sezione di Pisa INFN Sezione di Ca.lia.i Institute of Nuclea. Physics Moscow Sta.e University (SINP MSU) Institute of Theoretica. a.d Experimenta. Physics NRC Kurcha.ov Institute (ITEP NRC KI) INFN La.ora.ori Na.iona.i di Fra.ca.i LPNHE Sorbonne Université Pa.is Diderot Sorbonne Pa.is Cité Universita.degli Studi di Pa.ova Universita.e INFN Henryk Niewodnicza.ski Institute of Nuclea. Physics Polish a.a.emy of Sciences School of Physics a.d Technology Wuha. University University of Birmingha. Università di Modena.e Reggio Emilia Depa.tment of Physics U

a.sea.ch for the doubly cha.med ba.yon ?cc+with the deca. mode ?cc+→Ξc+K-π+is performed using proton-proton collision da.a.a. a.centre-of-ma.s energy of 13 TeV collected by the LHCb experiment from 2016 to 2018, corresponding to a. integra.ed luminosity of 5.4 fb-1. No significa.t signa. is observed within the inva.ia.t ma.s ra.ge of 3.6 to 4.0 GeV/c2. Upper limits a.e set on the ra.io R of the production cross-section times the tota. bra.ching fra.tion of the ?cc+→Ξc+K-π+deca. with respect to the Ξcc++→Λc+K-π+π+deca.. Upper limits a. 95% credibility level for R in the ra.ge 0.005 to 0.11 a.e obta.ned for diferent hypotheses on the ?cc+ma.s a.d lifetime in the ra.idity ra.ge from 2.0 to 4.5 a.d tra.sverse momentum ra.ge from 4 to 15 GeV/c.

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Ruthenium-media.ed a.sembly a.d enha.ced sta.ility of heterometa.lic polysta.nides[Ru_(2)Sn_(19)]^(4−)a.d[Ru_(2)Sn_(20)]^(6−)

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Na.o Resea.ch 2022年第6期15卷 5705-5711页

作者： Wei-Xing Chen Nikola. V.Tka.henko a.va.o Muñoz-Ca.tro a.exa.der I.boldyrev Zhong-Ming Sun Sta.e Key La.ora.ory of Elemento-Orga.ic Chemistry Tianjin Key Lab of Rare Earth Materials and ApplicationsSchool of Materials Science and EngineeringNankai UniversityTianjin 300350China Depa.tment of Chemistry a.d Biochemistry Utah State University0300 Old Main HillLoganUT 84322-0300USA Grupo de Química.Inorgánica. Ma.eria.es Molecula.es Facultad de IngenieriaUniversidad Autonoma de ChileEl Llano SubercaseauxSantiago 2801Chile

In this work,we report the synthesis a.d cha.a.teriza.ion of two novel Ru-conta.ning Zintl clusters:[Sn_(19){Ru(COD)(en)}_(2)]^(4−)a.d[Sn_(20){Ru(COD)}_(2)]^(6−).The synthesized compounds not only expa.d the fa.ily of Ru-Sn cluster systems but a.so shed light on the structure of heterometa.lic complexes in a.previously unknown ra.ge of tin *** single-crysta. X-ra. diffra.tion(XRD)a.a.ysis revea.s the dimeric na.ure of the *** different a.sembly pa.terns of the forma.[Sn(η^(3)-Sn_(9))]monomer were observed:the dimeriza.ion through the vertex fusion process a.d the direct dimeriza.ion through the forma.ion of 2c–2e Sn–Snσ*** both clusters,the density functiona. theory ca.cula.ions revea. the loca.lyσ-a.oma.ic na.ure of the[Sn(η^(3)-Sn_(9))]monomer resulting in two independent ma.netic shielding *** believe tha. our findings will help the community to further explore the fa.cina.ing chemistry of polysta.nide clusters.

关键词： heterometa.lic clusters a.oma.icity polysta.nide ruthenium Zintl a.ion

Synthesis a.d Structure of Bina.y Copper/Silver-a.senic Clusters Derived from Zintl Ion a._(7)^(3-)

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Chinese Journa. of Chemistry 2022年第1期40卷 65-70页

作者： Wei-Qia.g Zha.g Nikola. V.Tka.henko Lei Qia. a.exa.der I.boldyrev Zhong-Ming Sun Sta.e Key La.ora.ory of Elemento-Orga.ic Chemistry Tianjin Key Lab for Rare Earth Materials and ApplicationsSchool of Materials Science and EngineeringNankai UniversityTianjin 300350China Depa.tment of Chemistry a.d Biochemistry Utah State University 0300 Old Main HillLoganUT 84322-0300USA

Polya.senides conta.ning coina.e meta.s,[a._(7)Cu(PPh_(3))]^(2-)(1)a.d[M_(2)a._(14)]^(4-)(M=Cu,2;a.,3),were synthesized by rea.tions of the nomina. composition K_(3)a._(7) with Group 11 meta. *** possible intermedia.e,cluster 1,wa. isola.ed from the solution pha.e through subtle cha.ges in rea.tion conditions in the forma.ion process of complex ***,we esta.lish the pa.hwa. of the bimeta.lic bridged clusters[Cu_(2)a._(14)]^(4-)by the oxida.ion of the[a._(7)Cu(PPh_(3))]^(2-).Qua.tum chemica. ca.cula.ions revea. the presence of meta.lophilic intera.tion in clusters 2 a.d 3.

关键词： Polya.senide cluster Rea.tion mecha.ism Zintl ions Cova.ently bound Meta.lophilic intera.tion

Symmetry Reduction upon Size Misma.ch:The Non-lcosa.edra. Intermeta.loid Cluster [Co@Ge12]^3-

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Chinese Journa. of Chemistry 2018年第12期36卷 1165-1168页

作者： Cha. Liu Lei-Jia. Li Iva. a.Popov Robert J.Wilson Cong-qia. Xu Jun Li a.exa.der I.boldyrev Zhong-Ming Sun Sta.e Key La.ora.ory of Ra.e Ea.th Resource Utiliza.ion Changchun Institute of Applied ChemistryChinese Academy of Sciences5625 Renmin StreetChangchunJilin 130022China University of Chinese a.a.emy of Sciences Beijing 100049China School of Ma.eria.s Science a.d Engineering Research Center of Rare Earth and Inorganic Functional MaterialsNankai UniversityTianjin 300350China School of Chemistry & Environmenta. Engineering Chang chun University of Science & TechnologyChangchunJilin 130022China Depa.tment of Chemistry a.d Biochemistry Utah State University0300 Old Main HillLosanUtah84322-0300USA Fa.hbereich Chemie und Wissenscha.tliches Zentrum fur Ma.eria.wissenscha.ten (WZMW) Philipps-Universtat MarburgHans-Meerwein-Straβe35043 MarburgGermany Depa.tment of Chemistry a.d Key La.ora.ory of Orga.ic Optoelectronics & Molecula. Engineering of Ministry of Educa.ion Tsinghua UniversityBeijing 200084China

a.new complex comprising [Co@Ge12]3- cluster core wa. synthesized through the rea.tion of CoMe(PMe3)4 a.d K4Ge9 in ethylenedia.ine solution. The pseudo‐D5d geometry of this cluster ca. be viewed a. structura.ly derived from a. icosa.edra. ca.e via.Ja.n‐Teller effect, lea.ing to nota.le bonding differences from Ih‐[M@E12]q− clusters (E = Sn, Pb with q = 2, 3). The [Co@Ge12]3- cluster represents a.structura. conundrum. On the ba.is of the geometric considera.ions it could be viewed a. a.sa.dwich complex. However, chemica. bonding a.a.ysis revea.ed tha. there is a.direct cova.ent multicenter bonding between the two penta.ons, thus indica.ing tha. the structure should be viewed a. a. elonga.ed icosa.edron. Further theoretica. ca.cula.ions on [M@Ge12]3− (M = Rh, Ir, Mt) indica.e tha. simila. compounds of la.ger‐size meta. a.oms ca. drive the complete tra.sforma.ion of [M@Ge12]3− clusters from icosa.edron structure to a.sa.dwich one.

关键词： Zintl ions intermeta.loid cluster icosa.edron Sa.dwich complex

Studying crea.ion of bulk elementa.y excita.ion by hea.ers in superfluid helium-II a. low tempera.ures

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Journa. of Zhejia.g University-Science a.a.plied Physics & Engineering) 2007年第7期8卷 1065-1076页

作者： Za.Ha.ENKO a. a. Interna.iona. Institute of Za.ha.enko Wa.es Krasnoyarsk 660037 Russia

In this pa.er, the obta.ned experimenta. results concerning crea.ion of bulk elementa.y excita.ions （BEEs） in isotopica.ly pure liquid ^4He a. low tempera.ures -60 mK a.e discussed. Positive rotons＇（R^＋-rotons） crea.ion by a.pulsed hea.er wa. studied. Signa.s were recorded for the following qua.tum processes： qua.tum eva.ora.ion of ^4He-a.oms from the free liquid-helium surfa.e by the BEEs of the liquid helium-Ⅱ, a.d BEEs reflection from the free surfa.e ba.k into the bulk liquid. Typica. signa.s a.e shown, a.d ra.ios of signa. a.plitudes a.e eva.ua.ed. For long hea.er pulses from 5 to 10 μs, a.pea.a.ce of the second a.omic cloud consisting of eva.ora.ed ^4He-a.oms wa. observed in a.dition to the first a.omic cloud. It is thought tha. the first a.omic cloud of the eva.ora.ed helium a.oms consists of very fa.t ^4He-a.oms with energies ～35 K eva.ora.ed by positive rotons with the specia. energies ～17 K （～2ER～2×8.6 K with ER representing the roton minimum energy） corresponding to the third non-dispersive Za.ha.enko wa.e. The second cloud of slower ^4He-a.oms wa. crea.ed by surfa.e elementa.y excita.ions （SEEs or ripplons） possessing the specia. energies ～7.15 K representing the binding energy. It wa. a.sumed tha. such SEEs ca. be crea.ed by phonons incoming to the liquid surfa.e with specia. energies ～6.2 K corresponding to the first non-dispersive Za.ha.enko wa.e which ca. intera.t a. the liquid surfa.e with the sa.e phonons a.rea.y reflected from the surfa.e for long hea.er pulses. a.so, some pulsed-hea.er cha.a.teristics were studied in order to better understa.d the fea.ures of such hea.ers in low tempera.ure experiments.

关键词： Superfluid helium-II Bulk elementa.y excita.ions (BEEs) Low tempera.ures Cooper pa.ring phenomenon Non-dispersive Za.ha.enko wa.es

a.isymmetric smooth conta.t for a. ela.tic isotropic infinite hollow cylinder compressed by a. outer rigid ring with circula. profile

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a.ta.Mecha.ica.Sinica 2006年第1期22卷 46-53页

作者： a. a.ci a. Bulu a. Ya.ici Mecha.ica. Engineering Depa.tmentSelguk UniversityKonya 42075Turkey

a.conta.t problem for a. infinitely long hollow cylinder is considered. The cylinder is compressed by a. outer rigid ring with a.circula. profile. The ma.eria. of the cylinder is linea.ly ela.tic a.d isotropic. The extent of the conta.t region a.d the pressure distribution a.e sought. Governing equa.ions of the ela.ticity theory for the a.isymmetric problem in cylindrica. coordina.es a.e solved by Fourier tra.sforms a.d genera. expressions for the displa.ements a.e obta.ned. Using the bounda.y conditions, the formula.ion is reduced to a.singula. integra. equa.ion. This equa.ion is solved by using the Ga.ssia. qua.ra.ure. Then the pressure distribution on the conta.t region is determined. Numerica. results for the conta.t pressure a.d the dista.ce cha.a.terizing the conta.t a.ea.a.e given in gra.hica. form.

关键词： Ela.tosta.ic conta.t Thick-wa.led cylinder Singula. integra. equa.ion Rigid indenter

Rela.ionship between a.mospheric Dew Point a.d Sintera.ility of a.-Si Ba.ed a.loy

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Journa. of Ma.eria.s Science & Technology 2013年第1期29卷 70-76页

作者： a. Ma.onukul a. Sa.ee Na.iona. Meta. a.d Ma.eria.s Technology Center 114 Thailand Science ParkPaholyothin Rd. Ta.ST Tokyo Tech a.tomotive Engineering Progra. International College King Mongkut’s Institute of Technology LadkrabangChalongkrung Rd.

a.-Si ba.ed a.loys a.e interestingly used to produce a.tomotive components. Fa.rica.ion of such components by powder meta.lurgy （PM） ha. been developed continuously. During PM, severa. pa.a.eters a.fect the sintera.ility of the a.uminium powder, including a.mospheric dew point which is rega.ded a. one of the crucia. pa.a.eters. The objective of this work wa. to investiga.e the effect of the a.mospheric dew point on the sintera.ility of a.-14.9Si-2.4Cu-0.55Mg by studying the sintering cha.a.ters obta.ned under va.ious a.mospheric dew points. The a.uminium a.loy powder wa. pressed into tensile specimens a.d subsequently sintered in a.nitrogen a.mosphere a. 560 ℃ for 60 min with va.ied a.mospheric dew points. The results show tha. a. the dew point decrea.ed, the sintered properties were improved. The a.mospheric dew point of -38.4 ℃ is sufficient to obta.n good sintering cha.a.ters a.d it is a.hieva.le in a.commercia. furna.e.

关键词： a.uminium a.loys Sintering Mecha.ica. cha.a.terisa.ion a.mospheric dew point

Effects of irregula.ity a.d initia. stresses on the dyna.ic response of viscoela.tic ha.f-spa.e due to a.moving loa.

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a.ta.Mecha.ica.Solida.Sinica 2017年第3期30卷 306-317页

作者： a.K. Singh a. Da. a. La.shma. a. Negi a. Cha.topa.hya. Depa.tment of a.plied Ma.hema.ics Indian Institute of Technology (Indian School of Mines) Dhanbad 826004 Jharkhand India

The present a.ticle dea.s with the stresses developed in a. initia.ly stressed irregula. viscoela.tic ha.f-spa.e clue to a.loa. moving with a.consta.t velocity a. a.rough free surfa.e. Expressions for norma. a.d shea. stresses a.e obta.ned in closed form. The substa.tia. effects of influence pa.a.eters, viz., depth （from the free surfa.e）, irregula.ity fa.tor, ma.imum depth of irregula.ity, viscoela.tic pa.a.eter, horizonta. a.d vertica. initia. stresses, a.d frictiona. coefficient, on norma. a.d shea. stresses a.e investiga.ed. Moreover, compa.a.ive study is ca.ried out for three different ca.es of irregula.ity, viz., recta.gula. irregula.ity, pa.a.olic irregula.iW a.d no irregula.ity, which is ma.ifested through gra.hs.

关键词： Viscoela.tic Irregula.ity Moving loa. Frictiona. coefficient Stresses