1. Rare Isotope Spectroscopic INvestigation at GSI

2. Count Rate Estimate luminosity [atoms cm-2 s-1]
σf [cm2] for projectile fragmentation + fission
abrasion
ablation
70% transmission SIS – FRS
εtrans transmission through the fragment separator FRS
event rate[s-1] = luminosity[cm-2s-1] * σ[cm2] * 0.7 * εtrans

3. Primary Beam Intensity
20% speed of light
deflecting magnets
focussing magnets
acceleration
speed of light
Max. 90%
experiment
UNILAC
eff. puls width
for injection: 47μs
36.2% efficiency
Ion
Number of injections
Intensity [spill-1] at FRS
Ion source
Date
58Ni 1
6*109
MEVVA
3.2006
107Ag
3*109
2.2006
124Xe
5*109
MUCIS
3.2008
136Xe 4
7.2006
208Pb 30
1.3*109
PIG
238U
2.0*109
9.2009
15.5% speed of light
intensity[s-1]=0.5*intensity[spill-1]
period of one revolution 4.7μs, 10 turns will be accepted for injection, acceleration: 0.5s, extraction 1s, magnet resetting 0.5s

4. RIBs produced by fragmentation or fission

5. Nuclear Reaction Rate Primary + secondary reaction rate:
Primary reaction rate:
Example: 238U (109s-1) on 208Pb (x=1g/cm2) → 132Sn (σf=15.4mb) reaction rate: 44571[s-1]
Example: 124Xe (109s-1) on 9Be (x=1g/cm2) → 104Sn (σf=5.6μb) reaction rate: 375[s-1]
The optimum thickness of the production target is limited by the loss of fragments due to secondary reactions
Primary + secondary reaction rate: 1
0.79 2
1.25 3
1.47 4
1.55 5
1.53 6
1.45
Example:

6. Secondary Beam Rate at S4
Beam intensity: 109[s-1]
Target thickness: 1[g/cm2]
Ion
Reaction
σ[b]
εFRS[%]
Rate[s-1]
36Si
48Ca+9Be
6.6·10-5 15
622
50Ca
82Se+9Be
4.5·10-6 14 42
46Cr
58Ni+9Be
1.6·10-5 32
342
68Ni
86Kr+9Be
5.3·10-5 25
886
82Ge
0.8·10-6 59
104Sn
124Xe+9Be
5.6·10-6 55
206
134Te
136Xe+9Be
3.7·10-4 45
11137
179W
208Pb+9Be
8.8·10-4 33
19425
88Kr
238U+208Pb
2.6·10-2
0.3
226
132Sn
1.5·10-2
1.2
521

7. Secondary Beam Intensities at S4
transmission SIS-FRS: 70%
primary Xe-beam intensity: 2.5·109[s-1]
Be-target thickness: 4g/cm2
transmission through FRS: 60%
primary U-beam intensity: 109[s-1]
Pb-target thickness: 1g/cm2
transmission through FRS: 2%

8. Experimental set-up 56Cr Z 15 clusters (105 HPGe crystals)
FRS + RISING setup
LYCCA-0
86Kr, 480MeV/u
56Cr
15 clusters (105 HPGe crystals)
ΔEγ=1.6% (1.3 MeV, d=70cm)
εγ = 2.8% Z
A/Q

9. Experimental set-up 15 clusters (105 HPGe crystals)
FRS + RISING setup
LYCCA-0
15 clusters (105 HPGe crystals)
ΔEγ=1.6% (1.3 MeV, d=70cm)
εγ = 2.8%
Ring
angular range 1 2 3

10. Reaction Types at Relativistic Energies
secondary beam intensity: 103[s-1]
target Au thickness: 0.4[g/cm2]
Coulex cross section: 0.50[b]
RISING γ-efficiency: 3%
reaction rate: 66[h]
secondary beam intensity: 103[s-1]
target Be thickness: 0.7[g/cm2]
fragmentation cross section: 0.03[b]
RISING γ-efficiency: 3%
reaction rate: 152[h]

11. Scattering Experiments at 100MeV/u
angular width (mrad)
target thickness (mg/cm2)
Coulomb excitation:
grazing angle (mrad)
projectile mass number A1

12. target: Au,Be

13. Bremsstrahlung slowing down of a moving point-charge
electric field lines (v/c=0.99)

14. Atomic Background Radiation
Radiative electron capture (REC) capture of target electrons into bound states of the projectile:
Primary Bremsstrahlung (PB)
capture of target electrons into continuum states of the projectile:
Secondary Bremsstrahlung (SB)
Stopping of high energy electrons in the target:

15. Atomic Background Radiation
Radiative electron capture (REC) capture of target electrons into bound states of the projectile:
Primary Bremsstrahlung (PB)
capture of target electrons into continuum states of the projectile:
Secondary Bremsstrahlung (SB)
Stopping of high energy electrons in the target:

17. 1381
807

18. Additional Background Radiation
132Xe beam (150 MeV/u) → Au target (0.2 g/cm2)
time spectrum (ns)
At the very beginning…
prompt (target)
1420
84Kr beam (100 MeV/u) → Au target
time spectrum (ns)
1420
prompt (target)
HECTOR BaF2

19. Additional Background Radiation
HECTOR BaF2
Early gamma radiation 5ns, coming from the beam line, caused by the light particles, ranging to very high energies (0-20 MeV)
8-12ns after
15ns after

20. Additional Background Radiation
37Ca beam
at 196MeV/u
prompt
CATE
HECTOR BaF2
Coulomb excitation:
A/Q - 37Ca, CATE - Ca
time spectrum
prompt
Fragmentation:
A/Q - 37Ca, CATE -K
(mainly 36K)
time spectrum

21. Additional Background Radiation
Incoming-outgoing projectile selection, Au target
~600MeV/u 68Ni secondary beam
~100MeV/u 54Cr secondary beam ?
197Au Cx line(s~35mb)
~200MeV/u 132Xe primary beam
511
548
200
400
600
800
1000
1200

22. First fast-beam PRESPEC proposals
Proposed experiment: 25Si, 29S and 33Ar
PRESPEC-Array, LYCCA ToF-DE-E-Telescope
Coulomb excitation of 104Sn
Proposal by M. Gorska, J. Cederkall
Mixed-symmetry states in 88Kr
Proposal by J. Jolie, N. Marginean