„the perfect stopped beam experiment“ clean fragment separation unique fragment identification...
-
date post
22-Dec-2015 -
Category
Documents
-
view
231 -
download
2
Embed Size (px)
Transcript of „the perfect stopped beam experiment“ clean fragment separation unique fragment identification...

„the perfect stopped beam experiment“
clean fragment separation
unique fragment identification A, Z
fragment position x, y, z
decay radiation position correlation for, p, conv. electron(not for isomeric )precise energywith highest efficiency
d e t e c t o r s
FRS
thoughtsby Thomas Faestermannbased on two 100Sn experiments

Beta decay

Requirements for “clean” Gamov-Teller -transition
good shell model nucleus
valence nucleon can decayto spin-orbit partner shell of unlike nucleon
large Q-value, in orderthat most of the strengthis accessible in -decay

Measurement of the Gamov-Teller-strength

Fragment Separator at GSI

Fragment identification

Implantation detector

detector types

Implantation profile

Implantation detector

100Sn event in Super-Clover
Total: 2780 keV
Segmentsincreased by ~ 10%

Half-life of 102Sn

Decay scheme of 102Sn

Beta decay of 102Sn

Gamov-Teller strength of Sn isotopes

Conclusions
correlation of decay with implanted fragment gives clean spectra
this requires fine 3 dim. position of fragment and decay
highest efficiency and energy resolution for all detectors
100Sn is still a challenge


Production cross sections

Energy calibration of the implantation detector

readout for implantation

readout for decay