Contents - Max-Planck-Institut für Physik komplexer Systeme

|| 2
1
0.8
0.6
0.4
0.2
0 2 4 6 8 10
1
0
0 50 100 150 200
t (fs)
0.95
Figure2: Survivalprobabilityofa2svacancy
inNe5H + (solidline)-theexponentialdecay
isshownwithadashedline. Theinset(logarithmicscale)showsthedeviationfromtheexponentialdecayatshorttimes.
Note,thatfor
timesbeyondthatoftheinsetthebeginning
motionofthenucleiwillchangethepresentresultswhichisbasedonstaticnuclei.
0.9
Electronic decay in charged environment While
thepresenceofasinglechargecanmodifytherate
oftheexponentialdecayofacore-ionizedstate, a
multiplepositiveenvironmentcandramaticallychange
thedecayandevenleadtoanoscillatorybehavior[3].
ThisisduetothefactthattheAugerelectronisnot
ejectedintoatruecontinuum,butratherintoamanifoldofshake-upboundstates.Asaconsequence,the
outgoingelectronwaveiseventuallyreflectedfrom
theeffectivepotentialboundary. Asimilarproblem
wasencounteredbyBixonandJortnerinthecontextofnon-radiativedecay[13]andsolvedtherefor
amodelproblem.WehavedevelopedanADC-based
time-dependentfirst-principlesapproachthatisable
topredictthetruedynamicsofelectronicdecayina
givenhighlyionizedsystem. ForCoster-Kronigdecayof
(2s −1 )Ar + ArinmultiplyionizedAr13cluster,
wefindaroughlyexponentialdecayinthebeginning
whichiseventuallysuppressedbytheoscillatorywavepacketdynamicsatlatertimes,seeFig.1.
Forthe
muchslowerexponentialICDinadoublyionizedNe6
cluster,wefindasub-exponentialdecayinthecharged
environment(Fig.2).
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Thephysicsofproteinaggregationphenomena
(Dr.ChiuFanLee)
Thephysicsofproteinaggregationphenomena Mycurrentmainresearchinterestsconcernthe
phenomenaofproteinaggregation,andtheirrelationstohumanpathologyanddevelopmentalbiology.
Specifically,Iaminvestigatingtheaggregationphenomenaof(i)proteinamyloids,whicharelinearselfassembledstructureofproteinsthatareintimatelyrelatedtoagreatvarietyofhumandiseasessuchastheAlzheimer’sdiseaseandtypeIIdiabetes,and(ii)Pgranules,whicharegermcellgranulesintheonecellembryooftheroundwormC.elegans.
Thesegranulesareinstrumentaltotheproperdevelopment
ofthegametesoftheorganism.
104 DetailsandData