金属电子逸出功的测定

实验35金属电子逸出功的测定学号：班级：姓名：在不同T时，-的关系编程（Matlab程序）T1=1.85*10^3Ia=[27.0,28.5,29.0,29.9,30.0,30.5,31.0,31.6];ia=Ia.*10^-6;Ua=[25.0,36.0,49.0,64.0,81.0,100.0,121.0,144.0];y=log(ia)./log(10)x=sqrt(Ua);p=polyfit(x,y,1);x1=0:0.1:15;y1=polyval(p,x1);plot(x,y,'*',x1,y1);%T1用*gridonholdonT2=1.88*10^3Ia=[45.0,46.1,48.0,48.0,50.0,54.0,55.0,58.0];ia=Ia.*10^-6;Ua=[25.0,36.0,49.0,64.0,81.0,100.0,121.0,144.0];y=log(ia)./log(10)x=sqrt(Ua);p=polyfit(x,y,1);x1=0:0.1:15;y1=polyval(p,x1);plot(x,y,'p',x1,y1);%T2用五角星符gridonholdonT3=1.91*10^3Ia=[75.0,76.0,80.0,81.0,82.0,85.0,90.0,92.0];ia=Ia.*10^-6;Ua=[25.0,36.0,49.0,64.0,81.0,100.0,121.0,144.0];y=log(ia)./log(10)x=sqrt(Ua);p=polyfit(x,y,1);x1=0:0.1:15;y1=polyval(p,x1);plot(x,y,'+',x1,y1);%T3用十字线gridonholdonT4=1.94*10^3Ia=[120.0,121.0,125.0,127.0,130.0,130.5,133.0];ia=Ia.*10^-6;Ua=[25.0,36.0,64.0,81.0,100.0,121.0,144.0];%舍去（135.0,49.0)y=log(ia)./log(10)x=sqrt(Ua);p=polyfit(x,y,1);x1=0:0.1:15;y1=polyval(p,x1);plot(x,y,'.',x1,y1);%T4用实心黑点gridonholdonT5=1.98*10^3Ia=[179.0,190.0,199.0,200.0,210.0,212.5,225.0,230.0];ia=Ia.*10^-6;Ua=[25.0,36.0,49.0,64.0,81.0,100.0,121.0,144.0];y=log(ia)./log(10)x=sqrt(Ua);p=polyfit(x,y,1);x1=0:0.1:15;y1=polyval(p,x1);plot(x,y,'s',x1,y1);%T5用方块符gridonholdonT6=2.01*10^3Ia=[280.0,282.0,295.0,300.0,310.0,315.0,335.0,330.0];ia=Ia.*10^-6;Ua=[25.0,36.0,49.0,64.0,81.0,100.0,121.0,144.0];y=log(ia)./log(10)x=sqrt(Ua);p=polyfit(x,y,1);x1=0:0.1:15;y1=polyval(p,x1);plot(x,y,'^',x1,y1);%T6用上三角形gridonholdonT7=2.04*10^3Ia=[480.0,490.0,500.0,496.0,510.0,515.0,520.0,540.0];ia=Ia.*10^-6;Ua=[25.0,36.0,49.0,64.0,81.0,100.0,121.0,144.0];y=log(ia)./log(10)x=sqrt(Ua);p=polyfit(x,y,1);x1=0:0.1:15;y1=polyval(p,x1);plot(x,y,'v',x1,y1);%T7用下三角形gridon运行2、的关系编程lgI=[-4.60,-4.43,-4.19,-3.95,-3.81,-3.61,-3.35];T=[1.85,1.88,1.91,1.94,1.98,2.01,2.04];T=T.*1000;y=lgI-2.*log(T)./l