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Fysikexperiment i forskning och samhälle FYSN11, HT 2011

Concepts to be followed

We have four group per two student which have been assigned one concept that they should follow throughout the course. On October, 4th, 2011 each group should present the concept and how it was used in the different fields discussed. All students need to be active in the oral presentation, which should have a length of approximately 20 minutes, followed by a discussion.

The groups are the following:

Energy levels

Vytantas
Hammad

Conservation rules

Fisnik
Johan

Cross sections

Donya
Pouria
Sara

Scattering

Edita
Anas

 

Second lecture (Concepts)

Here is the powerpoint presentation from the lecture.

Third lecture

Here is the powerpoint presentation from the lecture.

And here is also the hand-in problem (due 23 September).

Fourth lecture

Here is the powerpoint presentation from the lecture.

Lecture on scanning tunnelling microscopy by Petra Reinke

Here is the pdf presentation from the lecture.

Electron spectroscopy lab

The date for the electron spectroscopy lab is 15 September, 9 o'clock.

We meet at 9.00 at the reception of MAX-lab, Ole-Römers-väg 1.

Here is the data from our lab session (in text format, the photon energies are found in the files as "Monochromator Energy"; the relevant data are the two columns in the end of the file - these are binding energy and counts):
ItGraph6_0054.txt
ItGraph6_0055.txt
ItGraph6_0056.txt
ItGraph6_0057.txt
ItGraph6_0058.txt
ItGraph6_0059.txt
ItGraph6_0060.txt
ItGraph6_0061.txt
ItGraph6_0062.txt
ItGraph6_0063.txt

Report:

Please write a report, which preferably should be as short and concise as possible, but which should contain your motivation for any claim and which should provide sufficiently detailed information (e.g. not only the elements, but also which levels).

Please address the following questions in your report:

  • In the long overview spectra taken with 990 or 1000 eV photon energy: please identify (to the extent possible) all peaks and label them.
  • Compare the overview spectra measured with 625 eV and 630 eV photon energy. There are some peaks which change their binding energy with photon energy. Please explain the physics behind these shifted peaks in detail.
  • The spectrum with number 58 contains three peaks, which you already have identified above. Two of these peaks belong together. Please explain in some detail, why we see a split line.
  • Use the spectrum with number 59 to properly calibrate the binding energy scale of the spectrum with number 58. Please explain in detail what you do and what the physics behind the calibration are. Then read off the binding energies of the peaks (explain how you read it) and compare to literature date. Suggest why their are differences between the literature data and the data measured here.
  • Think about and discuss why there is a background, which increases with binding energy (visible especially in the wide overview spectra).

Latest date for handing in: 30 September, noon (12 a.m.).

Good luck!

Electron binding energies can be found at e.g. http://www.nottingham.ac.uk/~ppzjno/pes1.htm.

 

 


Kursen "Fysikexperiment i forskning och samhälle" ges av Avdelningarna för högenergifysik, kärnfysik och synkrotronljusfysik vid Fysiska institutionen.
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