1. Recoil Separator

daughterduckΠολεοδομικά Έργα

15 Νοε 2013 (πριν από 3 χρόνια και 9 μήνες)

118 εμφανίσεις

1.
Recoil Separator

2.
TRIμP Traps general

3.
Al
41
Catraz : trace analysis of calcium isotopes

TRI
m
m

G. Berg

O. Dermois

L. Slatius


2001

Combined Fragment and Gas Filled Recoil Separator


Cooling and Trapping Hall

Beam from AGOR

Separator Hall

Schematic drawing of the TRIμP facility

Laser cooling and trapping of calcium isotopes

S.Hoekstra

C.van Ditzhuijzen, J.Mulder, R.Morgenstern, H.Wilschut, R.Hoekstra

KVI Atomic Physics Groningen, The Netherlands

40
Ca

96.941

%

41
Ca

102000 y

42
Ca

0.647

%

43
Ca

0.135

%

44
Ca

2.086

%

45
Ca

162.7 d

46
Ca

0.004

%

47
Ca

4.536 d

48
Ca

0.187

%

49
Ca

8.72 m

50
Ca

14 s

51
Ca

10 s

52
Ca

4.6 s

Isotope separation using laser cooling
techniques

ΔE=Δν


=7∙10
8
MHz


=423 nm

45

44

43

42

41

40

Isotope shift

Electronic transition

ΔE
40



ΔE
41
= Δν =150

MHz

150 MHz corresponds to a Doppler shift of 65 m/s

150 MHz corresponds to a Zeeman shift of 120 Gauss

Transverse velocity range :
±

60 m/s

Longitudonal velocity : 600 m/s

Isotope Selective
atomic beam
collimation
1.
Constructed the Ca
-
trap

2.
Observed trapping of
40
Ca,
42
Ca,
44
Ca and
48
Ca (
0.2%
)

3.
Calculations show important isotope selection mechanisms
in collimation and Zeeman slowing stages



Outlook until jan. 2003:

1.
Construct and test the Zeeman slower

2.
Show isotope selective collimation experimentally

3.
Optimize fluorescence detection

4.
Observe trapping of
43
Ca,
46
Ca (0.004 %)



Conclusions

A
l
C
a
t
r
a
z
4
1
3
4
4
2
3
-
C
A
4
1
-
0
6
5
7