Hi Scott,

                   I know that alpha is not a temperature expansion coefficient .I guess it is a volume expansion coefficient( tell me if I am right).

Actually I want to know that is it necessary to fit Ei, 3rd, 4th, cumulant in the fitting procedure .If yes then please tell me  how to get them involve in the fit .when I give parameter like   guess 3rd, guess 4th . Artemis dont take them . And about Ei I am completely blank.I dont know how to use itand from where i will get it. One more thing is that I am fitting Cu foil, CuO and Cu2O , so how many number of paths should I take . And Thanks a lot for your suggestions

                                                                                    With regards

                                                                                    Abhijeet