穆斯堡尔谱仪实验讲义

1.2.3.1957196110-9eV10013057Fe83Kr119Sn149Sm151Eu161Dy169Tm181Ta57Fe14.4keV57FeI=3/2I=1/2119Sn23.8keV57Fe14.4keV1.γγγγτγω)(ωI220)21()(1τωω+−1E=hωh)(EI220)21()(1τωω+−2E-E0h2τγΓτΓΓτh31Γ)(EI220)2()(1Γ+−EE42.γγγγγγkeVMeVmEeEgE0=Ee-EgγmuRγPγmuR=Pγ=Eγ/c:E0=Eγ+ER2222222mcEmPmuERRγγ===γE0EREeEgERE0ERγEeEgERER2ER2(a)ERγΓ57FeE014.41keVER210-3eV,10-8eVEd2RKEEEK=2TKB2(b)Ed10-2eVEI(E)I0/2I0E0ΓEΓAbsorberEmitterE0-ERE0+ERE0EREREdEAbsorberEmitterE0-ERE0+ERE0EREREd12γ3.γ()Edγ222'McEERγ=M,m,0hω2hω3hωωγγfγ])/(exp[222cxEfh−=γx2γfγγ,,2x,57Fe0.7-0.8119Sn23.87keVγ4380100γ57Fe14.41keV4.610-9eV,Eγ3.210-134.ωVV∆ωωVcVγθγθγcosEcvEd=γEγE0EREdEK=TKVmB21212=KB212)(mTKVB=γEγmTKcEVcEEBdγγ==257FeT=300KEd2102eVERγγEcvEd=57Fe14.41keVγ1mm/s4.810-8eV1957γ191Irγ1961γ11)1/2hhIIZImPIIP=+=)1(4ImI2I+1I2)µInIIIZnIImgIIgµµµµ=+=)1(5gIgµn3)6Q3accaaaaaaacacaca(a)(b)(c)3(a)Q=0,;(b)Q0,;(c)Q0,2ReRg2)0(ψI.S.QEFGQ.S.HH.F.11)ssδEsrdrZeQr∫−=)3(122ρ])0()0()][()([542222SaRRRzSZeΨ−Ψ∆=πδ7S(z)ZS(z)RδR∆2)0(ψs(1s,2s,3s,……)pss4∆EE0’-E0δEe-δEg4.57Feα-Feα-Fe2O3SNP2)57Fe119SnQE∆ImIQ21222)31)](1(3[)1(2η++−−=∆IImIIqQeEIQ8zzVeq=(EFG)zzyyxxVVV/)(−=ηEFG10≤≤ηEFG(a)(b)57FeEgδΕeδΕgEeE0E0’55.57FeI1/257Fe,I=1/2I=3/2mI=1/2∆EQ2mI=3/2∆EQ2∆EQeQ36δEg12VZZ023±Zm±23=IEeEgδEe21=I∆EQ21±21±657FeHeffHhfµHImInmHmgHEµµ−=⋅−=9µnmIII+1……01……I2I12I157FeIg12gng0Ie32gne0mI=01θxθθ22cos1sin4+=x10θ0°θ90°77.57FeQegEEEEcVE∆+∆−∆−∆=2123211γQegEEEEcVE∆−∆−∆−∆=2121212γQegEEEEcVE∆−∆+∆−∆=2121213γQegEEEEcVE∆−∆−∆+∆=2121214γQegEEEEcVE∆−∆+∆+∆=2121215γQegEEEEcVE∆+∆+∆+∆=2123216γEEc∆=γδ46521VVVV+++=δ)(24VVcEEg−=∆γ)(23eVVcEE−=∆γ2)()(1256QVVVVcEE−−−=∆γ1VγγEcVEED0=γγ1.8.8i.57Fe57CoPdRhPt57Coα-FemCimCi57CoPdii.iii.NaIiv.2.-512105106-α-Feα-Fe2O33.57Co14.41keVγ122.05keV136.46keVγ57Co57FeX14.41keVγ914.41keVAB957Co4.51215121512-Vmax+Vmax,-Vmaxγ123αFe41γαFeαFeαFeN1N2N3N4N5N6V6V110.657mm/secsec)/(657.10161616•−=−−=CHmmNNNNVVk2N0Pd57Co57CoPdαFe0.185mm/secαFeδ46521VVVV+++αFe3αFe∆E∆EQ∆Ee∆Egα-FeH33T57Fegnegng4αFeµn=5.0510-27J/Th=1.05510-34Js112257CoCo56Fe3411987220003[]U·197941993