ilima at fair isomers, lifetimes and masses at facility for antiproton and ion research gsi,...
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ILIMA at FAIR
Isomers, Lifetimes and Masses atFacility for Antiproton and Ion Research GSI, Darmstadt, Germany
78 scientists, 20 institutions, 10 countries
Phil Walker, spokesperson, U of SurreyYuri Litvinov, deputy spokesperson, GSIHelmut Weick, project manager, GSI
FAIR at GSI
Intense beams of RIBsand very exotic nuclides
SIS 18
SIS 100/300
Super-FRS
NESR
CRRESR
ESR
GSI todayGSI today Future facilityFuture facility
ESR
ILIMA
Dy-149 in ESR
149Dy in the Experimental Storage Ring[Yu.A. Litvinov et al., Phys. Lett. B573 (2003) 80]
Isomers, Lifetimes and Masses
I = 27/2
I = 7/2SIS
FRS
ESRSchottky P ick-U ps
from U
NILA
C Target
Electron cooler
TO F detector
ESR circumference = 108 m[isomers up to I = 43/2 seen in fragmentationPodolyak et al., Phys. Lett. B632 (2006) 203]
[Yu.A. Litvinov et al., Nucl. Phys. A756 (2005) 3]
single-ion in-ring decay
No
ise
po
we
r d
en
sity
/ a
rb. u
.
Tim
e af
ter
inje
ctio
n
Pr140 58+
C e140 58+
Q = 3388 keVEC
Frequency [kHz] - 61000.0
187.4 187.6187.2 187.8
Insert scraper
Frequency [kH z] - 61000.0
187.4 187.6187.2 187.8T
ime
afte
r in
ject
ion
Noi
se p
ow
er d
ensi
ty /
arb.
u.
Pr140 58+ C e140 58+
Q = 3388 keVEC
Injection length 170 s Injection length 520 s
isomer beam purification
[F. Bosch et al., Int. J. Mass Spec. 251 (2006) 212]
125mCe58+ (t1/2~150s)
[C. Petrache et al.,Eur. Phys. J. A14 (2002) 439]
B. Sun et al., Eur. Phys. J. A31 (2007) 393
92 keV
first “new” isomer in ESR
SMS and IMS
Schottky Mass Spectrometry (with cooling): T½ > 1 s
Isochronous Mass Spectrometry: T½ > 10 μs
both methods have single-ion sensitivity
resolving power ~ 106
accuracy ~ 30 μu, i.e. ~ 30 keV
mass measurements
electron cooling
Schottky method
ADC 640 kHz
time-of-flight detectorsfor isochronous method
isochronous method[L. Chen et al., GSI Annual Report 2005;R. Knöbel et al., AIP Conf. Proc. 891 (2007) 199]
FAIR rings
NESR circumference = 222 m
IMPROVEMENTSlarger momentum acceptancemore Schottky pickupscooled Schottky pickupsTOF-detector optimisation=> better efficiency=> better resolution=> shorter half-lives
potential for new masses with ILIMA
58
65 r-processpath
rp-processpath
2028
50
82
8
8
20
28
50
82
126
m asses m easured at the FR S-ESR
stable nucle i
nuclides w ith know n m asses
W ill be m easured w ith SU PER-FR S-C R-N ESR
more beam (x1000)more efficiency (x10)more sensitivity
ILIMA collaborationGSI, Germany: E. Badura, K. Beckert, F. Bosch, C. Dimopoulou, A. Dolinski, P.Egelhof, B. Franczak, B. Franzke, H. Geissel, F. Herfurth, J. Hoffmann, H.-J. Kluge, R.K. Knöbel, C. Kozhuharov, N. Kurz, S.A. Litvinov, Yu.A. Litvinov, G. Münzenberg, F. Montes, I. Nesmiyan, F. Nickel, F. Nolden, C. Nociforo, W. Ott, W. Quint, C. Scheidenberger, H. Simon, M. Steck, Th. Stöhlker, K. Sümmerer, B. Sun, S. Typel, G.K. Vorobjev, H. Weick, N. Winckler, M. WinklerGießen, Germany: D. Boutin, L. Chen, T. Dickel, B. Fabian, M. Petrick, W.R. PlaßMünchen, Germany: T. Faestermann, P. Kienle, L. Maier, P. Ring, D. VretenarFrankfurt,Germany: Th. BürvenichMainz, Germany: K. Blaum, K.-L. Kratz, B. PfeifferSt.Petersburg, Russia: Yu.N. Novikov, D.M. Seliverstov, Yu. GusevOrsay, France: G. Audi, D. LunneyBruxelles, Belgium: K. TakahashiThessaloniki, Greece: G.A. LalazissisWarsaw, Poland: Z. Janas, M. Pfützner, Z. PatykSurrey,UK: Z. Podolyak, P.M. WalkerEdinburgh, UK: P.J. Woods, Z. LiuManchester, UK: D.M. CullenMSU, USA: M. Hausmann, M. Matoš, H. SchatzLos Alamos, USA: D. Madland, P. Moeller, D. VieiraLanzhou, China: Ruishi Mao, Zhiyu Sun, Guoqing XiaoNiigata, Japan: T. OhtsuboSaitama, Japan: T. Suzuki, T. YamaguchiTsukuba, Japan: A. Ozawa
78 scientists, 20 institutions, 10 countries