ISOLDE Emily Ghosh ISOLDE I sotope mass S eparator O n- L ine DE - PowerPoint PPT Presentation

ISOLDE Emily Ghosh

ISOLDE I sotope mass S eparator O n- L ine DE tector Located at Proton Synchrotron Booster (PSB) at CERN Use of radioactive nuclei beams for experiments in  Nuclear and Atomic Physics  Solid State  Material Science  Life Science 2

The ISOLDE facility HRS ISCOOL WITCH GPS TAS VITO collections NICOLE MINIBALL COLLAPS Travelling IDS CRIS setups ISOLTRAP 3

The ISOLDE facility 4

Emission Mössbauer spectroscopy Implanted propes: g b 57 Mn (1.5 min.) → 57M Fe ( 100 ns) → 57 Fe g b 119 In (2.4 min.) → 119M Sn (23 ns) → 119 Sn Major benefits: Sample D E ( g ) ~ neV → Hyperfine interactions Measure dilute (~10 -4 at.%) Chemistry of Mn/In Recoil  E R  ~ 40 eV ( 57 Mn → 57M Fe )  E R  ~ 8 eV ( 119 In → 119M Sn ) → Interstitial defects 5

Emission Mössbauer spectroscopy Implanting isotopes to see effects on surrounding material  Gamma radiation to sample  Emission from the sample is probed using sample as reference 6

Quenching experiments 1. Implant (and measure) at elevated temperatures (RT-1000 K) 2. Remove the sample from vacuum, quench in liquid nitrogren, measure off-line On-line Off-line Samples measurement measurement Implantation in LN bath chamber 7

Quenching experiments 1. Implant (and measure) at elevated temperatures (RT-1000 K) 2. Remove the sample from vacuum, quench in liquid nitrogren, measure off-line 8

Quenching experiments 1. Implant (and measure) at elevated temperatures (RT-1000 K) 2. Remove the sample from vacuum, quench in liquid nitrogren, measure off-line 9

Quenching experiments 1. Implant (and measure) at elevated temperatures (RT-1000 K) 2. Remove the sample from vacuum, quench in liquid nitrogen, measure off-line 10

Quenching experiments 1. Implant (and measure) at elevated temperatures (RT-1000 K) 2. Remove the sample from vacuum, quench in liquid nitrogren, measure off-line 11

Quenching experiments Implanting 57 Mn and 119 In into silicon nitrides  Damage or magnetic properties? 12

Quenching experiments Implanting 57 Mn and 119 In into silicon nitrides  Damage or magnetic properties? 8 Hot Temperatures : Ni50Mn34In16 7 807K 6 768K 5 645K 4 535K 3 434K 2 307K 1 -4 -3 -2 -1 0 1 2 3 4 13