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Lecture 22
29.4
| Lest time | tatecedecec jdee ot Spontaneous Eni sfion
[
Rm system in excite stete
[Deives by “sero ~ pet”
Get cote fran
Evnsfern t
olecey to
eprennd stete
well
anectam Eur Fe tol
TH trcoberent cechretisn oleives treasYron
ot rete
Roa, = RP (oo, )
Then Sporteneos Eon ocenss et
rete tw,?
. _ he
Repeat - A = wre?
_ Bat
= ~ 8B
— . . : zz Xr
an hipole fPploxrmetion, R= Bake | |
coy tpt .
Se ~A* ws ket
Tr mockern use, typielly werte 1 lastercl of A
Foc hy deogen, cen celealete gl A
exectHy
For other atows, very APE ALF, Ty pieelly
measuce A (= L/trfetime of stete)
and ged Plt from
Rh
s3
Foc instance, ie atons
derrys to
ther
. loedest excited stele ry
ve
Ise "
Lifetime of SPs 26.6n5
Az FRO in - -
t 2 lap zx Sea
IF? Ye
—)
Alueys ®% ea br As pole allowed
tren sitions
[Dipole dtlowed D PF = Chl~e#(ad #O
Ta meny cases , pee, For restence, .
beth A + Ye are s-s tetes
then pe Oo by sywmetey
a seck cases, teens tions are mech sfower ea
: Drtve- by
ty Higher orclec electée Li eth
hn Teylor eX Per$i on of ¢e5 (KE? -t)
> prod lem A .2
UD Megretic pect of EM Let
Saceller by Vie.
3) Malti- photon process
ie, emt two phefors wm, Wy, woth
lot, = ww
o
I Geaece Ny mech slower -
Litetime of Us ctete 1. hydrosen = Onl 7
(es [26-5 for 2p) |
283
c)
while CHT Pa ceeyyt4)
<a | UL feed- Leezremy
(t
OL IH AS ~ LON) CH | ee ALD
M
= 4 C9 9 ~ etm ye PAD
Together, require 2 [ Ofa\ + 9794S] = (9's) ~ Of Det)
i Not ‘ so easy to “solve tae grertic eh atron
! |
ast tums oct it factors into two gree ctics
rm |
tr [Ot INV- TPO = 0
z
| So. elther (9’-gel) = 4
| > A= 2=O, bat use Enow
Pr in thet esse
olreedy
o, Urea a dS Se ps |
[Aes ES cleaimech
|Note, This cer be lecived mote ces ily worth
Some fancier meth (scan theory)
e JAis0 car see let need AX = odcl pretty ess ly,
Stace Hom 7 eer for Q oven
odd for 2 edel
cone cz oddl
Leu- ax - 7% ] 42 *CuU)
. . (x40 ee t78 4 4°7 Ox] pr?
4 o=C('1 WJ LAT > A7b]
coe. (QTE. 87) ate /
[Looe a) CEN ET 2 Ee
Lee CMa] - Cro 2 ee steal ‘e)
C g L
As
Ces 8-4] ve
faye - 47Ke + TA =] t =Lety es
ant 44x x
sty FaagK 2 x94
ae + 7%
(479 293 2&4
fers extp se Gh-Sq ye 8!
STH CADET © TRE + Cay T=
ar sqfetyele yy + “TLR Ces
(ey Leh) -Av7) +e)
€ |
So [ULOad)= -2 Segal, -2eb Vtxly
~ Zale 42x Lylytatyly
- La 4 xL3 —— 4
= 24 Palaly ~ 2k xby + Ix lyly 7 Why by
+(22Lb~ 22) - sagt
= 2b (Veaset) ~4ef (gl- ae),
¢ («ly tryJLX
yali)
= 20 (1242) ~ ge lagla + Laxby +k, jf
fu Ceiy) 4
RLY BiBpzo
[So fe, CUA. = 2b (pe ral) as rey eof
