ilima at fair isomers, lifetimes and masses at facility for antiproton and ion research gsi,...

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 working groups

Working Groups

p.walker@surrey.ac.uk y.litvinov@gsi.de buervenich@fias.uni-frankfurt.de

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