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Lund University

Fysikexperiment i forskning och samhälle FYS N11, HT 2010

Groups and concepts to be followed

Each group of students has been assigned one concept that they should follow throughout the course. On October, 5th, 2010 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:

Group A ("Energy levels")

Fan Pan
Lau Chit Siong
Alema Kindera
Mohammed Ahmed

Group B ("Excitations")

Akvile Zabiliate
Saloan Algharbi
Fedesa Abdisaz
Shi Liangliang

Group C ("Conservation rules")

Hailay Teklegiorgis
Kamal Alselo
Alaa Edlin Mahmoud
Jakob Merouani

Group D ("Elastic scattering")

Ali Ghasemia Azar
Edita Mjekiki
Behraz Bezarg

 

Second lecture (Concepts)

Please find the powerpoint presentation from the lecture here.

 

Third lecture

Here is the powerpoint from the lecture.

Here is a link to the article on the Vasa: Sandström et al., Nature 415 (2002) 893.

If you're interested in further reading on the Vasa subject, here are three links:
Gunnar Almkvist, PhD thesis, Sveriges lantbruksuniversitet, Uppsala (2008),
Yvonne Fors, PhD thesis, Stockholms universitet (2008),
Y. Fors and M. Sandström, Chem. Sov. Rev. 35 (2006) 399.

 

Fourth lecture

Here is the powerpoint from the lecture.

 

Electron spectroscopy lab

Here are the data and exercises for the two groups:

Group 1 (the group, which measured first):

First spectrum
Second spectrum

Your tasks are the following:

  1. Identify and assign - to the extent possible - all peaks in the spectrum. Specify both element(s) and spectral line assignments!
  2. Discuss in detail why the peak at around 305 - 310 eV is split into two components. Hint: Consider both the initial and final states of photoemission! For both states, consider the relevant quantum numbers.
  3. The two spectra were taken at different photon energies. Obviously this has introduced some difference into the spectra. Explain the difference and discuss the changed spectral lines. Hint:We have discussed the effect behind in one of the lectures.

Group 2 (the group, which measured last):

Spectrum

Your tasks are the following:

  1. Identify and assign - to the extent possible - all peaks in the spectrum. Specify both element(s) and spectral line assignments!
  2. Discuss in detail why the peak at around 60 eV is split into two components. Hint: Consider both the initial and final states of photoemission! For both states, consider the relevant quantum numbers.
  3. Discuss what intensity ratio you expect for the two peaks of the state at around 60 eV.
  4. The broad peak at around 90 eV is related to the two peaks at around 60 eV. Discuss what could give rise to this peak. Hint: Consider what happens in and after the photoemission process to the excited electron.

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

Hand-in deadline for these exercises: 11 October 2010.

 

 


Kursen "Fysikexperiment i forskning och samhälle" ges av Avdelningarna för högenergifysik, kärnfysik och synkrotronljusfysik vid Fysiska institutionen.
Adress: Sölvegatan 14, S-223 62 Lund, Sweden
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