N e u t r i n o E f f e c t s b e f o r e , d - - PowerPoint PPT Presentation
N e u t r i n o E f f e c t s b e f o r e , d u r i n g , a n d a f t e r t h e F r e e z e o u t o f t h e r - P r o c e s s M a r i k o T e r a s a w a ( C N S )
α
H
B u b b l e R e g i
d e n s i t y
i g h t e m p e r a t u r e
i g h e n t r
y
x p≡t
x p
r=
S e e d+
+ −
e e
* *
’
e
– νe ＋n → p ＋ e
t h i s p r
i s i m m e d i a t e l y i n c
p
a t e d i n t
w i t h
h e r n e u t r
s .
( M e y e r e t a l . 1 9 9 8 )
e , i =
p , i
5 1e
α, m a x=
p , i
W i t h ν- p r
e s s W i t h
t ν- p r
e s s
e , i =
p , i
5 1e
– νe ＋n → p ＋ e
t h i s p r
i s i m m e d i a t e l y i n c
p
a t e d i n t
w i t h
h e r n e u t r
s . – ν+ α→3 H ＋p a t l
t e m p e r a t u r e . t h i s p r
m a k e s α。
3
H ( α, γ)
7
L i ( α, γ)
1 1
B ( α, γ) ・・・S e e d n u c l e i i n c r e a s e b y α- c a p t u r e s .
3
7
1 1
( M e y e r 1 9 9 5 )
W i t h ν- p r
e s s W i t h
t ν- p r
e s s
( M e y e r 1 9 9 5 )
– νe ＋n → p ＋ e
t h i s p r
i s i m m e d i a t e l y i n c
p
a t e d i n t
w i t h
h e r n e u t r
s . – ν+ α→3 H ＋p a t l
t e m p e r a t u r e . t h i s p r
m a k e s α。
3
H ( α, γ)
7
L i ( α, γ)
1 1
B ( α, γ) ・・・S e e d n u c l e i i n c r e a s e b y α- c a p t u r e s .
x p
( Q i a na n d W
l e y1 9 9 6 , C a r d a l l a n d F u l l e r 1 9 9 7 , O s t u k i e t a l . 2 , S u m i y
h i e t a l . 2 , T h
p s
e t a l . 2 1 , T e r a s a w a e t a l . 2 2 e t c . )
3rd peak REE hill 2nd peak
( T e r a s a w a 1 9 9 9 )
x p
τe
x p
≪τν→ ν- p r
e s s d
s n
w
k b e c a u s e
l i t t l e i n t e r a c t i
s .
+ −
e e
* *
’
e
,
x p～ 2
B
W i t h ν- i n d u c e d n
m i s s i
s W i t h
t
e s
w i t h w i t h
t
[Fe/H] ~ -3.1 [Fe/H] ~ -3.0 [Fe/H] ~ -3.0