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STARS ( & STRIPES?) @ Gammasphere C.W.B. and Mitch Allmond

STARS ( & STRIPES?) @ Gammasphere C.W.B. and Mitch Allmond (for the LLNL/LBNL/Richmond Collaboration). STARS = Silicon Telescope Array for Reaction Studies. STARS-LiBerACE at the 88-Inch at LBNL. “raytrace”. .14mm. g. .5mm. 1mm. 1mm. 48 Rings. 16 Sectors. p. d Beam @ 21&29 MeV.

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STARS ( & STRIPES?) @ Gammasphere C.W.B. and Mitch Allmond

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  1. STARS ( & STRIPES?) @ Gammasphere C.W.B. and Mitch Allmond (for the LLNL/LBNL/Richmond Collaboration) STARS = Silicon Telescope Array for Reaction Studies

  2. STARS-LiBerACE at the 88-Inch at LBNL “raytrace” .14mm g .5mm 1mm 1mm 48 Rings 16 Sectors p d Beam @ 21&29 MeV 235U + 12C** fis Fission-E DE E1 E2 Si Det Si Det Clover (6 in all) 400 mg/cm2 target with 12C backing **

  3. STARS and Liberace Used at LBNL for a variety of reaction / structure experiments including the surrogate reaction program STARS: Charge particles and fission About 20% geometric efficiency Liberace: 6 Clover detectors About 1% gamma efficiency

  4. 235U(d,p)236U as surrogate for 235U + n 235U(d,pg ) 236U Particle ID: p-g p-f 235U(d,pf ) 236U Banana gate on p Heavy mass fragment Light mass fragment. Relative Energy

  5. Internal Ratio Result for 235U(n,g) ENDF J.M. Allmond et al. Phys. Rev. C79, 054610 (2009).

  6. particle – gamma – gamma 2 105 events in matrix

  7. Summary Count Rate: Liberace ~ 1 % vs. Gammasphere ~9% Particle – gamma Increase by factor of 9 Particle-gamma-gamma increase by factor of 80! STARS: (& STRIPES ???) Chamber exists which has run at Gammasphere in the past! 96 channel feedthrough (3 S2 detectors) Preamps and analog electronics available up to ADC (possibly digital also?) Interest and effort available from Richmond (CWB, Mitch Allmond) and Livermore (Jason Burke, Lee Bernstein) in bringing STARS to Gammasphere

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