Theme group for b-delayed neutron measurements

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Presentation transcript:

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) Timeline for tests and experiments

(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

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

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

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

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 PhD thesis C. Hinke, TUM (2010) Diploma thesis K. Steiger, TUM (2009) to be replaced by AIDA in >2012

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)

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

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

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