„the perfect stopped beam experiment“ clean fragment separation unique fragment identification...

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„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 energy with highest efficiency d e t e c t o r s FRS thoughts by Thomas Faestermann based on two 100 Sn experiments

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Transcript of „the perfect stopped beam experiment“ clean fragment separation unique fragment identification...

Page 1: „the perfect stopped beam experiment“ clean fragment separation unique fragment identification A, Z fragment position x, y, z decay radiation

„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

Page 2: „the perfect stopped beam experiment“ clean fragment separation unique fragment identification A, Z fragment position x, y, z decay radiation

Beta decay

Page 3: „the perfect stopped beam experiment“ clean fragment separation unique fragment identification A, Z fragment position x, y, z decay radiation

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

Page 4: „the perfect stopped beam experiment“ clean fragment separation unique fragment identification A, Z fragment position x, y, z decay radiation

Measurement of the Gamov-Teller-strength

Page 5: „the perfect stopped beam experiment“ clean fragment separation unique fragment identification A, Z fragment position x, y, z decay radiation

Fragment Separator at GSI

Page 6: „the perfect stopped beam experiment“ clean fragment separation unique fragment identification A, Z fragment position x, y, z decay radiation

Fragment identification

Page 7: „the perfect stopped beam experiment“ clean fragment separation unique fragment identification A, Z fragment position x, y, z decay radiation

Implantation detector

Page 8: „the perfect stopped beam experiment“ clean fragment separation unique fragment identification A, Z fragment position x, y, z decay radiation

detector types

Page 9: „the perfect stopped beam experiment“ clean fragment separation unique fragment identification A, Z fragment position x, y, z decay radiation

Implantation profile

Page 10: „the perfect stopped beam experiment“ clean fragment separation unique fragment identification A, Z fragment position x, y, z decay radiation

Implantation detector

Page 11: „the perfect stopped beam experiment“ clean fragment separation unique fragment identification A, Z fragment position x, y, z decay radiation

100Sn event in Super-Clover

Total: 2780 keV

Segmentsincreased by ~ 10%

Page 12: „the perfect stopped beam experiment“ clean fragment separation unique fragment identification A, Z fragment position x, y, z decay radiation

Half-life of 102Sn

Page 13: „the perfect stopped beam experiment“ clean fragment separation unique fragment identification A, Z fragment position x, y, z decay radiation

Decay scheme of 102Sn

Page 14: „the perfect stopped beam experiment“ clean fragment separation unique fragment identification A, Z fragment position x, y, z decay radiation

Beta decay of 102Sn

Page 15: „the perfect stopped beam experiment“ clean fragment separation unique fragment identification A, Z fragment position x, y, z decay radiation

Gamov-Teller strength of Sn isotopes

Page 16: „the perfect stopped beam experiment“ clean fragment separation unique fragment identification A, Z fragment position x, y, z decay radiation

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

Page 17: „the perfect stopped beam experiment“ clean fragment separation unique fragment identification A, Z fragment position x, y, z decay radiation
Page 18: „the perfect stopped beam experiment“ clean fragment separation unique fragment identification A, Z fragment position x, y, z decay radiation

Production cross sections

Page 19: „the perfect stopped beam experiment“ clean fragment separation unique fragment identification A, Z fragment position x, y, z decay radiation

Energy calibration of the implantation detector

Page 20: „the perfect stopped beam experiment“ clean fragment separation unique fragment identification A, Z fragment position x, y, z decay radiation

readout for implantation

Page 21: „the perfect stopped beam experiment“ clean fragment separation unique fragment identification A, Z fragment position x, y, z decay radiation

readout for decay


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