{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

MSE2020LectureNotes_4_5

# MSE2020LectureNotes_4_5 - θ1 θB ∆θ θ2 θB ∆θ • =...

This preview shows pages 1–2. Sign up to view the full content.

MSE 2020 4/5/2011 Page 1 of 2 Multiplicity Factor (cont) When determining the number of permutations for a family of planes, repetition is allowed o = number of permutations number of choices possiblerepetition allowed Multiplicity (number of permutations for a family of planes) increases intensity Certain peaks will be absent in certain crystal groups o Lorenz Factor Detector picks up on a range of θ (Δθ) As θ changes, Δθ allowed changes Δθ = width at half maximum How tolerance changes with Bragg angle θ (θ dependent or not?) ± , θB ∆θ ∆θ is small = + , =

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: - θ1 θB ∆θ θ2 θB ∆θ • = =- = ( (-)-(-extra distance δ1'2' acosθ2 acosθ2 a cos θB ∆θ cos θB ))= ≈ ∆θ 2asin∆θsinθB 2a∆θsinθB • At θ B would be constructive interference; close to θ B is slight destructive interference (within Δθ) and it goes to full destructive interference • Relationship between δ 1’2’ and I D (next class) MSE 2020 4/5/2011 Page 2 of 2 o Math Background Information • Euler Relation o = + eiθ cosθ isinθ o For all odd multiples of π: = -eπi 1 o For all even multiples of π: = e2πi 1 o...
View Full Document

{[ snackBarMessage ]}

### Page1 / 2

MSE2020LectureNotes_4_5 - θ1 θB ∆θ θ2 θB ∆θ • =...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online