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![Page 1: Trends in Heavy Ion Physics Research, Dubna, 21-25 May Present and future physics possibilities at ISOLDE Karsten Riisager PH Department, CERN](https://reader035.fdocuments.in/reader035/viewer/2022062905/5a4d1af87f8b9ab059982ac0/html5/thumbnails/1.jpg)
Trends in Heavy Ion Physics Research, Dubna, 21-25 May
Present and future physics possibilities at ISOLDE
Karsten RiisagerPH Department, CERN
http://www.cern.ch/isolde
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Trends in Heavy Ion Physics Research, Dubna, 21-25 May
ISOLDE@CERN
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Trends in Heavy Ion Physics Research, Dubna, 21-25 May
RIBs for 40 years
• High-energy proton beam– 600 MeV → 1.4 GeV
• Accumulated experience in RIB-production and -manipulation– targets and ion sources– charge breeding– cooling, bunching, ...
• Many experimental tools
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Trends in Heavy Ion Physics Research, Dubna, 21-25 May
ISOLDE yields, 2006
ISOLDE target groupM. Turrion
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Trends in Heavy Ion Physics Research, Dubna, 21-25 May
Rex efficiencies
0.0
5.0
10.0
15.0
20.0
0 50 100 150 200 250
A
%
7Li238U
27Al
116Cd
Efficiencies for beams 2006Tot. eff. = Trap × BTS × EBIS × Sep
F. Wenander
So far: 53 radioactive isotopes of 20 elements – reaching 188Hg
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Trends in Heavy Ion Physics Research, Dubna, 21-25 May
30,31,32Mg
67,69,71,73Cu, 68Cu, 70(m)Cu68Ni
74,76,78,80Zn28
50
20 40 50 82 184,186,188Hg82
70Se96Sr, 88Kr, 92Kr
20
The Coulex program
122,124Cd138,140Xe140,148,150Ba
106,108,110Sn
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Trends in Heavy Ion Physics Research, Dubna, 21-25 May
Collective properties studied by Coulomb excitation
Miniball
107Ag
REX-ISOLDE
30,32MgE=2.86 MeV/u
PPACdetector
Beam
CD – detectorDouble sided Si strip detector
Beam dump
Beamimpuritie
s
E-E detector
• 24 - 6-fold segmented Ge detectors• flexible geometry• full energy(@ 1.33 MeV) 7 %• fully digital electronics + pulse shape analysis (PSA)• electronic segmentation and PSA: 50-100 fold increase in granularity
• r from central core• from induced charge in neighboring segments
• low-multiplicity -ray experiments with weak exotic beams
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Trends in Heavy Ion Physics Research, Dubna, 21-25 May
68,mCu (2.83 MeV/u) @ 120Sn (2.3 mg/cm2)
70Cu (2.83 MeV/u) @ 120Sn (2.3 mg/cm2)
6-
(3-)
4-
(5-)
0 T1/2= 44.5 s101 T1/2 = 33 s
228
506
127 (M1)
No Doppler Corr.
Doppler Corr. for A=70
85 T1/2 = 7.84 ns1+
(2+)
6-
4-
(3-)722 T1/2 = 3.75 min
(5-)
0 T1/2 = 31.1 s
956178 (M1)
693
84
778 0.7 < T1/2 < 4 nsE2
E2
Post-accelerated isomeric beamsCoulomb excitation of 68,70Cu
242 T1/2 = 6.6 s 1+
I Stefanescu et al, PRL 98 (2007) 122701
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Trends in Heavy Ion Physics Research, Dubna, 21-25 May
Combination of spectroscopy, laser ionization and mass measurements
270
300
330
360
390
Mea
n TO
F /
s
270
300
330
360
390
Mea
n TO
F /
s
0 2 4 6 8 10 12
270
300
330
360
390
Mea
n TO
F /
s
c - 1300610 / Hz
16%
4%80%
Intensity ratio:
normalized to the area
with cleaning of 6– state
Unambiguous state assignment!c = B
qm
(6–) state = gs
(3–) state = 1.is
1+ state = 2.isR 1·10-7
ME of ground state is 240 keV higher than literature value!
Excellent agreement with decay studies.
101(3) keV101(3) keV
242(3) keV242(3) keV
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Trends in Heavy Ion Physics Research, Dubna, 21-25 May
Shape coexistence in the Pb region182Pb: T1/2 55 ms 1 count/min
186PbA.Andreyev et al. Nature, 405, 430 (2000)
Nilsson-StrutinskyNilsson-Strutinsky
Resonant Laser IonizationH. De Witte et al. PRL 98, 112502 (2007)
ISOLDE; more than 30 years ago
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Trends in Heavy Ion Physics Research, Dubna, 21-25 May
More evidence
Resonant Laser Ionization of Po isotopesT. Cociolis et al., preliminary results
Coulomb excitation of 184,186,188Hg isotopesN. Bree, A.Petts et al., preliminary results
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Trends in Heavy Ion Physics Research, Dubna, 21-25 May
An example: 30-33Mg
• 2nd 0+ in 30Mg at 1788 keV, weak mixing – Schwerdtfeger at Dec 07 ISOLDE workshop
• Coulex of (30,32Mg and) 31Mg – Reiter do• Transfer d(30Mg,31Mg)p – Bildstein do• Magnetic moments 31,33Mg, COLLAPS –
Yordanov et al, PRL 99 (2007) 212501
• Masses, MISTRAL – Lunney et al, Eur. Phys. J. A28 (2006) 129
• Level lifetimes – Mach et al, Eur. Phys. J. A25 (2005) 105
• Radii, beta-decay studies,...
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Trends in Heavy Ion Physics Research, Dubna, 21-25 May
Decay studies @ ISOLDE
previous IS414 results: H. Mach et al.
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Trends in Heavy Ion Physics Research, Dubna, 21-25 May
Aims of the upgradeIntensityEnergy
Coulex for all RIB Transfer reactions
Efficiency low energy + acceleratedSelectivityBeam “quality”
Reduced phase space Bunching
Polarization ..... > 100 keV/u
+ + +++
magnet
tilted foils
HF
+ + +++
magnet
tilted foils
+ + +++
magnet
tilted foils
HF
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Trends in Heavy Ion Physics Research, Dubna, 21-25 May
HIE-ISOLDE at CERNIncrease in REX energy from 3 to 5.5 MeV/u (later increase to 10 MeV/u possible)
Super-HRS for isobaric separationRILIS upgrade & LIST
RFQ cooler, REX-TRAP, REX-EBIS REX-ECR upgrades
Increase proton intensity 2 6 A (LINAC4, PSB upgrade) - target and front-end upgrade
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Trends in Heavy Ion Physics Research, Dubna, 21-25 May
... already ongoing
RFQ coolerUK, JYFL, Mainz..
RILIS upgradeSweden (Wallenberg)
REX extensionUK (Cockcroft Institute..), Leuven..
+ in CERN white paper “4. theme”
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Trends in Heavy Ion Physics Research, Dubna, 21-25 May
Bunched-beam laser spectroscopy: Bunched-beam laser spectroscopy: 4444KK
E. Mane
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Trends in Heavy Ion Physics Research, Dubna, 21-25 May
SC linac
M. Pasini
Max energy for different A/q :
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Trends in Heavy Ion Physics Research, Dubna, 21-25 May
Some extrapolated yields
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Trends in Heavy Ion Physics Research, Dubna, 21-25 May
European Roadmap for RIB facilities
Jan 07 agreement – Complimentarity;Collaboration
EU EURISOL Design Study
ESFRI list
107 €
108 €
109 €
EU FAIR Design Study
SPL (CERN)decision
P. Butler
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Trends in Heavy Ion Physics Research, Dubna, 21-25 May
Beta-Beams
2 x 1013 ions/s6He and 18Ne
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Trends in Heavy Ion Physics Research, Dubna, 21-25 May
Thanks to:
The ISOLDE Physics Group The ISOLDE Technical Group The ISOLDE Collaboration
Peter Butler Mats Lindroos Mark Huyse
http://hie-isolde.web.cern.ch/HIE-ISOLDE/HIE-ISOLDE: the technical options - CERN-2006-013HIE-ISOLDE: the scientific opportunities - CERN-2007-008