Petru Lunca-Popa

6 Questions 12 Answers 0 Followers

Questions related from Petru Lunca-Popa

Can anyone help with a XRD Brucker D8 alignment problem?

Recently I switch on Brucker diffractometer (previously worked on Philips) and I am having a problem with alignment. It worked perfect until last week when something happened (possible...

10 October 2014 419 19 View

How can I determine the Mott Schottky effect for a semiconducting film (200 nm) deposited on a highly doped (0.05 ohms) n type Si substrate?

I would like to know if it is possible to determine the sign of carriers and concentration (from 1/C2 vs Bias dependency) for such system. It is crucial to deposit the film on a metallic...

08 August 2014 7,196 3 View

Electron Impedance Spectroscopy: What is the physical meaning of the fitting circle with center below x axis?

What is the physical meaning of the fitting circle with center below x axis?

04 April 2014 426 6 View

For an asymmetric scan at a constant incident angle of 3 degree (Detector Scan), are there corrections needed for a 2 theta angle?

For a thin film on a silicon substrate I performed a scan at a fixed incident angle of 3 degree (I couldn't go lower from technical reasons). I got a nice scan but my question is if I have to...

02 February 2014 6,674 1 View

Can the absorption coefficient for a thin film really be determined using Kubelka Munk function? If yes in what conditions?

I am reading papers claiming the absorption of the film was determined by diffusive reflectance using Kubelka Munk theory. I know this theory is quite restrictive applying for opaque and quite...

02 February 2014 3,879 1 View

Absorptance of a transparent thin film on a thick glass?

For normal incidence of light can we really neglect the reflected light (in a spectrometer using an integrating sphere).

01 January 2014 2,584 7 View