frank herfurth gsi, darmstadt, germany for the isoltrap collaboration
DESCRIPTION
INTC meeting, February 20, 2006. Status report IS413: High-precision mass measurements of exotic nuclei with the triple-trap mass spectrometer ISOLTRAP. Frank Herfurth GSI, Darmstadt, Germany for the ISOLTRAP Collaboration. Experiments and results 2005 Technical developments Proposal 2006. - PowerPoint PPT PresentationTRANSCRIPT
Frank HerfurthGSI, Darmstadt, Germany
for the ISOLTRAP Collaboration
Status report IS413:High-precision mass measurements of exotic nucleiwith the triple-trap mass spectrometer ISOLTRAP
INTC meeting, February 20, 2006
• Experiments and results 2005
• Technical developments
• Proposal 2006
ISOLTRAP collaboration:G. Audi, S. Baruah, D. Beck, K. Blaum, G. Bollen, M. Breitenfeldt, P. Delahaye,
M. Dworschak, S. George, C. Guénaut, U. Hager, F. Herfurth, A. Herlert,A. Kellerbauer, H.-J. Kluge, D. Lunney, M. Marie-Jeanne, M. Mukherjee,
S. Schwarz, L. Schweikhard, C. Weber, C. Yazidjian, ... ,
Funding and support:BMBF, GSI, CERN, ISOLDE,
EU networks EUROTRAPS, EXOTRAPS, NIPNET, EURONS
The Team
ISOLTRAP runs in 2005
ISOLTRAP program 2005
total number of shifts: 30
ISOLTRAP mass measurements in 2005
71-81Zn71-81Zn
Nuclides measuredin 2005
Nuclides measuredin 2005
118,120,122-124Cd118,120,122-124Cd
126Xe, 136Xe126Xe, 136Xe
127,128,131-134Sn127,128,131-134Sn
17Ne, 19Ne17Ne, 19Ne
first doublycharged ions
measured after report 2004
ISOLTRAP mass measurements in 2005
-10 -5 0 5 10
280
300
320
340
360
380
mea
n T
OF
/ µ
s
rf - 1122161.85 Hz / Hz
81Zn+
42 44 46 48 50 52
6
8
10
12
14
16
S
2n /
MeV
neutron number N
ISOLTRAP mass measurements in 2005
ISOLTRAPAME2003
Zn
preliminary
Two neutron separation energy for the zinc isotopes
Technical Developments
new detector
0 20 40 60 800
2
4
6
8
10
CEMMCP
Nu
mb
er
of
Ion
s p
er
Pu
lse
Time / ms
Technical Developments
Heater
Fan
temperaturesensor
• Temperature & pressure stabilization
• New test ion source
• All elements• Mass selective
Nuclides from P160 proposal
Proposed ISOLTRAP mass measurement program 2006
Proposed ISOLTRAP mass measurement program 2006
Need hydrogen as buffer gas, preparation required
3
Proposed ISOLTRAP mass measurement program 2006
Clean gas inlet for N2
Good HRS settingto remove CO contaminant
Proposed ISOLTRAP mass measurement program 2006
Also possible as off-linerun with existing target,high statistics needed
Proposed ISOLTRAP mass measurement program 2006
Additionally, in-trap decay provides access to mass measurements on Fe isotopes
Proposed ISOLTRAP mass measurement program 2006
For UC target with quartztransfer line clean conditions expected(as for Zn)
Proposed ISOLTRAP mass measurement program 2006
Fr and Ra highly contaminate the beam, no solution found so far.
• Successful measurements using 30 shifts in 5 runs (+2 incomplete) in 2005
• A number of technical improvements increase stability and efficiency
• 27 shifts in 5 runs of radioactive beam requested for 2006
• + 3 shifts to test the access to He isotopes
Summary