Zeeman effect pattern, Intensities?

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Homework Help Overview

The discussion revolves around the Zeeman effect as observed in Mercury transitions from 3S1 to 3P0/1/2, focusing on the intensity patterns of the emitted light in a weak magnetic field. The original poster presents data collected through CCD imaging and expresses uncertainty regarding the interpretation of intensity ratios and the absence of a central peak in the blue pattern.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • The original poster attempts to analyze the intensity ratios of the observed spectral lines and questions the missing central peak in the blue pattern, suggesting that there should be seven transitions for the 3S1 to 3P1 transition.
  • Participants discuss the possible transitions and the conditions under which certain transitions may be forbidden, particularly focusing on the magnetic quantum numbers involved.

Discussion Status

Participants are actively exploring the reasons behind the missing transition and discussing the implications of the selection rules. Some guidance has been offered regarding the nature of forbidden transitions, but no consensus has been reached on the interpretation of the data or the specific transitions involved.

Contextual Notes

The original poster has referenced external resources to support their inquiry, indicating a reliance on established quantum mechanics principles, particularly regarding selection rules for transitions.

neu
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Im dong the zeeman effect for Mercury trasitions 3S1 --> 3P0/1/2 (Violet, Blue and Green lines).

I've taken CCD pictures of all lines in a weak B field and with polaroid placed parallel and perpendicularly, and produced graphs of pixel value v column number (intensity v horizontal position).

I cannot work out how to interpret the intensities. I've got the relative ratios from my data but they don't seem to be correct (well i don't know).

And i can't explain why the Blue pattern is missing it's central peak, ie there should be 7 transitions for 3S1 -->3P1 but graph only shows 6

http://www.breadnet.middlebury.edu/~PHManual/Photos/zeeman/fig4.gif

(From breadnet.middlebury.edu) a) is Blue pattern b) Green

Can somebody point me on the right path?
 
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neu said:
Im dong the zeeman effect for Mercury trasitions 3S1 --> 3P0/1/2 (Violet, Blue and Green lines).

. . . .

And i can't explain why the Blue pattern is missing it's central peak, ie there should be 7 transitions for 3S1 -->3P1 but graph only shows 6
What would those 7 be; from which levels in 3S1 to which levels in 3P1?
 
OlderDan said:
What would those 7 be; from which levels in 3S1 to which levels in 3P1?

J=1 in both shells so mj = -J,0,+J = -1,0,+1

Transitions,

mj= 1 -> mj = 1 Delta mj=0
mj= 0 -> mj = 0 Delta mj=0 <--This one is missing why?
mj=-1 -> mj =-1 Delta mj=0
mj= 1 -> mj =0 Delta mj=-1
mj= 0 -> mj =-1 Delta mj=-1
mj= 0 -> mj =1 Delta mj=1
mj=-1 -> mj =0 Delta mj=1

Thanks
 
Last edited:
neu said:
J=1 in both shells so mj = -J,0,+J = -1,0,+1

Transitions,

mj= 1 -> mj = 1 Delta mj=0
mj= 0 -> mj = 0 Delta mj=0 <--This one is missing why?
mj=-1 -> mj =-1 Delta mj=0
mj= 1 -> mj =0 Delta mj=-1
mj= 0 -> mj =-1 Delta mj=-1
mj= 0 -> mj =1 Delta mj=1
mj=-1 -> mj =0 Delta mj=1

Thanks
It is forbidden. See the very last paragraph of

http://hyperphysics.phy-astr.gsu.edu/hbase/quantum/hydazi.html
 

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