简介：

简介：Inthispaper,thecalculatingmethodoftheplasmaelectrondensitybasedontheHCNwaveformdataisintroduced.ThewaysdecidingthebasevoltageandthephasezerocrosspointsoftheHCNsignals,phaseandcomputingthedensityaredescribed.Moreover,someideasforthefurtherimprovementofthemethodarealsonoticedinthearticle.

简介：Inthispaper,theobtainedexperimentalresultsconcerningcreationofbulkelementaryexcitations(BEEs)iniso-topicallypureliquid4Heatlowtemperatures~60mKarediscussed.Positiverotons’(R+-rotons)creationbyapulsedheaterwasstudied.Signalswererecordedforthefollowingquantumprocesses:quantumevaporationof4He-atomsfromthefreeliq-uid-heliumsurfacebytheBEEsoftheliquidhelium-II,andBEEsreflectionfromthefreesurfacebackintothebulkliquid.Typicalsignalsareshown,andratiosofsignalamplitudesareevaluated.Forlongheaterpulsesfrom5to10μs,appearanceofthesecondatomiccloudconsistingofevaporated4He-atomswasobservedinadditiontothefirstatomiccloud.Itisthoughtthatthefirstatomiccloudoftheevaporatedheliumatomsconsistsofveryfast4He-atomswithenergies~35Kevaporatedbypositiverotonswiththespecialenergies~17K(~2ER~2×8.6KwithERrepresentingtherotonminimumenergy)correspondingtothethirdnon-dispersiveZakharenkowave.Thesecondcloudofslower4He-atomswascreatedbysurfaceelementaryexcitations(SEEsorripplons)possessingthespecialenergies~7.15Krepresentingthebindingenergy.ItwasassumedthatsuchSEEscanbecreatedbyphononsincomingtotheliquidsurfacewithspecialenergies~6.2Kcorrespondingtothefirstnon-dispersiveZakharenkowave,whichcaninteractattheliquidsurfacewiththesamephononsalreadyreflectedfromthesurfaceforlongheaterpulses.Also,somepulsed-heatercharacteristicswerestudiedinordertobetterunderstandthefeaturesofsuchheatersinlowtemperatureexperi-ments.

简介：Adoptingthecharge-dependentArgonneV_(18)plusmicroscopicthree-bodyforces,theequationofstate(EOS)andsingleparticlepropertiesofsymmetricnuclearmatterhavebeeninvestigatedinBrueckner-Hartree-Fock(BHF)framework~[1].Themicroscopicthree-bodyforcemodel