documentclass{standalone}

usepackage{kerkis}
usepackage{tikz}

begin{document}

usetikzlibrary{positioning}

tikzset{
  gold/.style = {
    top color=gray!60,
    bottom color=gray!20,
    minimum width=0.25cm,
    minimum height=2cm,
    anchor=west,
  },
  boron/.style = {
    top color=gray!80,
    bottom color=gray!40,
    minimum width=1cm,
    minimum height=2cm,
    anchor=west,
  },
  telescope/.style = {
    right color=black!70,
    left color=black!20,
    minimum width=1.2cm,
    minimum height=.4cm,
    sloped,
    pos=1,
    rotate=90,
  },
  E/.style = {
     top color=black!80,
     bottom color=black!40,
     minimum width=1.2cm,
     minimum height=1.4cm,
     sloped,
     pos=1,
     rotate=90,
   },
}

 begin{tikzpicture}

  coordinate (beam left) at (-5,0);
  coordinate (beam right) at (2,0);

  % Incident Beam
  draw[->, very thick] (beam left) -- (beam right);
  node[above right] at (beam left) (proton) {$p^+$};

  % Target : Boron + Au
  node[gold, label=95:$Au$] at (6,0) (gold) {};% Au
  node[boron, right=0mm of gold, label=80:$^{nat}B$] (boron) {};

  coordinate (hit) at (gold.west);

  % Telescopes
  path (hit) -- +(170:8)
        node[telescope, label=right:$6mu m$] (telescope1) {$Delta E$};
  path (hit) -- +(-120:8)
        node[telescope, label=left:$22mu m$] (telescope2) {$Delta E$};
  path (hit) -- +(170:9)
        node[E, label=20:$1000mu m$] {$mathbf{E}$};
  path (hit) -- +(-120:9)
        node[E, label=left:$1000mu m$]  {$mathbf{E}$};

  % Angles
  draw[dashed, gray, thick] (beam right) -- (hit);
  draw[dashed, gray, thick] (hit) -- (telescope1);
  draw[dashed, gray, thick] (hit) -- (telescope2);
  draw[<->,thick] (hit)  +(180:2) arc (180:170:2);
  path (hit) +(175:2) node[left] {$10^circ$};
  draw[<->,thick] (hit) +(180:2) arc (-180:-120:2);
  path (hit) +(210:2) node[left] {$60^circ$};
 end{tikzpicture}

end{document}