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Setups ( BELEN , MONSTER  D. Cano-Ott/ CIEMAT )

Theme group for b -delayed neutron measurements. Setups ( BELEN , MONSTER  D. Cano-Ott/ CIEMAT ) Implantation detector ( SIMBA , AIDA (>autumn 2010) ) Beams N=50 (78Ni): 124Sn (?) N=82 (132Sn, 130Cd): 136Xe, 238U, others (150Nd,154Sm?) N=126: 238U, 208Pb, (197Au)

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Setups ( BELEN , MONSTER  D. Cano-Ott/ CIEMAT )

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  1. Theme group for b-delayed neutronmeasurements • Setups (BELEN, MONSTER  D. Cano-Ott/ CIEMAT) • Implantation detector (SIMBA, AIDA (>autumn 2010)) • BeamsN=50 (78Ni): 124Sn (?) N=82 (132Sn, 130Cd): 136Xe, 238U, others (150Nd,154Sm?) N=126: 238U, 208Pb, (197Au) • Timeline for tests and experiments

  2. (Near) Timeline • Summer 2010: Neutron background test at S4 (5 single BELEN detectors): Implementation of BELEN and SIMBA into the GSI DAQ • Spring 2011?: Setup and test of BELEN-30 at GSI, first parasitic in-beam tests, then min. 2 weeks break (no exp. @ S4) • Early summer 2011?: Beamtime (6 days S323, 7 days S410) • >end of 2011- mid 2013: AGATA is coming, no BELEN measurements possible! Move BELEN to other labs • 2016(?): during construction of Super-FRS: experiments possible

  3. t1/2 exists identified GSI proposal Pn (%) QRPA N=82: Approved experiment (S323) N=82

  4. t1/2 exists identified GSI proposal Pn (%) QRPA N=126: Approved experiment (S410) N=126

  5. 30 counters 20 counters DETECTION EFFICIENCY [%] NEUTRON ENERGY [MeV] BEta deLayEd Neutron detector (BELEN) Efficiency for setup at GSI 2011 New BELEN-30 for GSI

  6. Silicon IMplantation detector and Beta Absorber (SIMBA) Constructed and developed at TU München Pictures: K. Steiger • • 1 x and 1 y-detector, 60x60x0.3 mm3, 60fold segmented each • 2 SSSSD, 60x40x1 mm3, 7fold segmented in x • 3 DSSSD (implantation area), 60x40x0.7 mm3, 60fold segmented in x-, 40fold in y-direction • 2 SSSSD, 60x40x1 mm3, 7fold segmented in x PhD thesis C. Hinke, TUM (2010) Diploma thesis K. Steiger, TUM (2009) to be replaced by AIDA in >2012

  7. Future • Similar proposals @ other labs? • Upgrades of the setup (more 3He counters, +g-det., AIDA...) • New proposals • Evaluation/ compilation of bdn • Workshop? (astrophysicists, reactor physicists, ...) • BELEN detector can/will be moved to other labs for experiments • Jyväskyla • ?GANIL? Possible future proposals: 78Ni (N=50, Z=28) 134In, ... (b2n emitters, check GANIL, ALTO program) 194W, 192Hf (deformed, Pn~10% predicted)

  8. (Main) institutions • UPC Barcelona • IFIC Valencia • CIEMAT Madrid • Santiago de Compostela • Jyväskyla • JINR Dubna • GSI-Giessen • Surrey • ...

  9. Setup: BELEN for DESPEC • 44 3He counters arranged in 3 crowns ~65% efficiency • 90cm90cm70cm PE block • 16cm hole for AIDA implantation detector • Triggerless DACQ: independent (t,E) for every counter, no ADC gate, minimum dead time, freedom to construct time correlations

  10. BEta deLayEd Neutron detector (BELEN) BELEN-20 Collaboration Universidad Politecnica de Cataluna, Barcelona IFIC Valencia CIEMAT Madrid BELEN-30 Collaboration: additionally

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