551 views

### How would you use electron diffraction to estimate nuclear diameter

So electrons fall into the category of particles called lepton s with don't interact with the strong nuclear force, this means they can be used for diffraction without getting affected too much by the nuclei they are intended to measure. This is because neautrons and alpha particles are affected by the strong nuclear force.

A beam of moving electrons ahs a de Broglie wavelength which at high speeds is approximated by hc/E where h is the planck constant, c is the speed of light and E is the charge in coulombs. Remember that in a question you're likely to get the beam strength in MeV so you need to times by 1.6*10-19 to get to coulombs!

Once we have the wavelenght we can use the sin function to obtain the diameter through the equation sin(theta)= 1.22*wavelength/d where d is the diameter of the nucleus and theta is the angle of the straight through posistion to the first minimum. This bit is somewhat easier to explain with a diagram. The 1.22 may sound a little arbitrary but it does have it's basis in reasonably complex physics, https://www.quora.com/Where-does-this-%CE%B8-1-22-%CE%BB-D-come-from-Whats-its-derivation

1 year ago

Answered by Robert, an A Level Physics tutor with MyTutor

## Still stuck? Get one-to-one help from a personally interviewed subject specialist

#### 100 SUBJECT SPECIALISTS

£22 /hr

Sam T.

Degree: Mathematical Physics (Bachelors) - Edinburgh University

Subjects offered:Physics, Maths+ 1 more

Physics
Maths
Chemistry

“I’m studying Physics with units in Maths and Chemistry. I really enjoy helping other people find a love for those subjects even if they think they're the worst.”

£26 /hr

Ashika V.

Degree: Physics (Masters) - Manchester University

Subjects offered:Physics, Maths+ 2 more

Physics
Maths
Extended Project Qualification
-Personal Statements-

“Hi I'm Ashika, a third year MPhys Physics student at the University of Manchester. I tutor in Maths and Physics, Personal Statements and the EPQ.”

£26 /hr

Samuel C.

Degree: Physics (Bachelors) - Durham University

Subjects offered:Physics, Maths+ 2 more

Physics
Maths
Further Mathematics
Chemistry

“Hi, I'm Sam Crawford. I'm studying Maths and Physics at Durham University, with an offer from Cambridge for next year, and I absolutely love both subjects.”

Robert L.

Currently unavailable: for regular students

Degree: Natural Sciences (Masters) - Durham University

Subjects offered:Physics, Maths+ 1 more

Physics
Maths
Geography

“Mathematically minded Durham Natural Scientist with fantastic A-Level results I could pass on to you! Full marks in 3/4 Geography exams, FP3 and M2.Super experienced tutor, helped students independently whilst in sixth form, voluteer...”

### You may also like...

#### Posts by Robert

differentiate x^3(1+x)^5 with respect for x

Evaluate how plate tectonics theory helps our understanding of the distribution of seismic and volcanic events.

How would you use electron diffraction to estimate nuclear diameter

solve z^4=2(1+isqrt(3)) giving roots in form r(cos(theta)+isin(theta))

#### Other A Level Physics questions

Describe and explain the first stages of the life cycle of a star before it reaches the main sequence.

How do you use a Variable Resistor to determine values to show the relationship between I and V?

Two railway trucks of masses m and 3m move towards each other in opposite directions with speeds 2v and v respectively. These trucks collide and stick together. What is the speed of the trucks after the collision?

Use band theory to explain the changes in the resistance of an intrinsic semiconductor as temper changes.

We use cookies to improve your site experience. By continuing to use this website, we'll assume that you're OK with this.