Skipper

Question 1

in a DIFFRACTION experiment we measure

Answer 1

STRUCTURE

Question 2

in a SPECTROSCOPY exp we measure

Answer 2

EXCITATIONS

Question 3

Pair Correlation functions

Answer 3

Question 4

summary of coherent scattering

Answer 4

Question 5

summary of incoherent scattering

Answer 5

Question 6

Scherrer Eq

Answer 6

particle size

bigger crystal -> narrower peaks

Question 7

Stokes-Wilson

Answer 7

strain broadening

Question 8

Thermal Motions

Debye-Waller and thermal diffuse scattering

Answer 8

Question 9

Debye Waller factor

Answer 9

Question 10

thermal diffuse scattering

Answer 10

Question 11

Williamson-Hall plot

Answer 11

combine Scherrer and Stokes-Wilson

Question 12

harmonic approx

Answer 12

Question 13

reduced wavevector

Answer 13

Question 14

1d monatomic chain

Answer 14

Question 15

1d chain dispersion

Answer 15

Question 16

1d chain cont

Answer 16

Question 17

1d chain cont cont

Answer 17

Question 18

Jx question

Answer 18

Question 19

3d monoatomic crystal

Answer 19

Question 20

Disp Curves in 3d monoatomic crystals

Answer 20

Question 21

Reduced Wavevector

Answer 21

Question 22

fcc 100

Answer 22

Question 23

fcc 110

Answer 23

Question 24

fcc 111

Answer 24

Question 25

bcc 100 110

Answer 25

Question 26

bcc 111

Answer 26

Question 27

1d dia chain

Answer 27

Question 28

1d dia chain disp

Answer 28

Question 29

1d dia chain cont.

Answer 29

Question 30

1d dia chain cont cont.

Answer 30

Question 31

1d dia chain cont cont cont

Answer 31

Question 32

lattice dynamics of alkali halides

Answer 32

Question 33

studying phonons - light scattering

Answer 33

Question 34

studying phonons - xray inelastic scattering

Answer 34

Question 35

studying phonons - neutron inelastic scattering

Answer 35

Question 36

schem of exp scattering amplitude differential cross section

Answer 36

Question 37

scattering from liq or glass

Answer 37

Question 38

orientationally averaged phase factor

Answer 38

Question 39

orientationally averaged phase factor cont.

Answer 39

Question 40

partial radial distribution function - liq and glasses

Answer 40

Question 41

coord no. - liq. and glasses

Answer 41

Question 42

1st 2nd coord no. in liq

Answer 42

Question 43

Caesium chloride, CsBr, forms a crystal with simple cubic symmetry with a conventional lattice parameter 𝑎 = 4.30 Å. Sketch the partial radial distribution functions, g_αβ(r), for liquid CsBr just above the melting point of 909 K . For each partial radial distribution function, give values for the approximate position of the first maximum and the coordination number. In the case of g_CsBr(r), use your figure to explain how one can calculate the coordination number

Answer 43

Question 44

Describe the thermal process by which, in practice, a glass can be formed, and explain what is meant by the glass transition temperature, T_g, and Kauzmann temperature, T_K.

Answer 44

Question 45

Sketch the specific heat capacity, 𝐶(𝑇), and entropy, 𝑆(𝑇), as a function of temperature and cooling rate as one cools a glass-forming liquid. Mark T_g, T_K, and the bulk melting temperature, Tm, on your plots. Explain also the thermodynamic significance of 𝑆(0) in a glass.

Answer 45

Question 46

differential scanning calorimetry (DSC)

Answer 46

Question 47

Answer 47

Question 48

Answer 48

Question 49

Answer 49

Question 50

Explain what is meant by the following terms in soft condensed matter physics: colloid, surfactant, micelle, and vesicle.

Answer 50

Question 51

small angle scattering

Answer 51

Question 52

small angle scat cont.

Answer 52

Question 53

small angle scat cont cont

Answer 53

Question 54

small angle cont cont cont

Answer 54