We minimise the χ2 χ2=∑i(ΔEpredicted2−ΔElatt2)2σ2 Kdf=P[0]M20E2+M2r+P[2]
χ2/d.o.f.=4.82825P[0]=8.28404±(1.7)P[1]=9.65554±(0.0032)P[2]=−1504.58±(53) {C=(2.940.2320.06580.2321e−05−0.5690.0658−0.5692.78e+03)}