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A.A. Voinov , V.G. Subbotin, V.K. Utyonkov, Yu.S. Tsyganov, A.M. Sukhov,

XXI II International Symposium on Nuclear Electronics and Computing . Bulgaria, Varna, 1 2 -1 9 September, 20 11. CALIBRATION OF THE SILICON POSITION-SENSITIVE DETECTORS USING THE IMPLANTED REACTION PRODUCTS. A.A. Voinov , V.G. Subbotin, V.K. Utyonkov, Yu.S. Tsyganov, A.M. Sukhov,

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A.A. Voinov , V.G. Subbotin, V.K. Utyonkov, Yu.S. Tsyganov, A.M. Sukhov,

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  1. XXIII International Symposium on Nuclear Electronics and Computing. Bulgaria, Varna, 12-19 September, 2011. CALIBRATION OF THE SILICON POSITION-SENSITIVE DETECTORS USING THE IMPLANTED REACTION PRODUCTS A.A. Voinov,V.G. Subbotin,V.K. Utyonkov, Yu.S. Tsyganov, A.M. Sukhov, A.N. Polyakov, A.M. Zubareva Joint Institute for Nuclear Research, 141980 Dubna, Russia

  2. 12 strips 300μm 40mm*10mm each in focal plane Particals’ signals: EVRs, alpha, FF Measurement: energy, (x,y), time Efficiency 87% of 4p for a-particles 100% of 4p for FF Dubna Gas Filled Recoil Separator XXIII International Symposium on Nuclear Electronics and Computing. Bulgaria, Varna, 12-19 September, 2011.

  3. XXIII International Symposium on Nuclear Electronics and Computing. Bulgaria, Varna, 12-19 September, 2011. Block diagram of the measuring electronics (only one detector circuit is shown completely).

  4. XXIII International Symposium on Nuclear Electronics and Computing. Bulgaria, Varna, 12-19 September, 2011. Diagram of the logic of the registration of nuclear reactions products at DGFRS

  5. nat.Yb Energy spectrum of a-particles detected in the natYb + 48Ca reaction. Spectrum of total energies deposited by the fission fragments of 252No implants as measured by the both focal-plane and side detectors (blue line) and by the focal-plane detector only (red line). XXIII International Symposium on Nuclear Electronics and Computing. Bulgaria, Varna, 12-19 September, 2011. + 48Ca + 48Ca 206Pb

  6. Dependence of ER-a position resolution (FWHM) on the amplitude of a-particle signal. The position resolution was derived by examining the atYb+48Ca data for escaping a particles depositing varying mounts of energy in the focal-plane detector. ER-a and ER-SF time intervals measured for 217Th and 252No produced in 48Ca-induced reactions with natYb and 206Pb, respectively. Distributions of position deviations of ER-a and ER-SF signals measured for 217Th and 252No produced in 48Ca-induced reactions with natYb and 206Pb,respectively. Spectra of measured energies of implants 217Th (left), 252No (right) and superheavy nuclei with Z=112-118 (middle). Solid histogram shows energies of Z=117 recoils observed in the reaction 249Bk+48Ca. XXIII International Symposium on Nuclear Electronics and Computing. Bulgaria, Varna, 12-19 September, 2011.

  7. XXIII International Symposium on Nuclear Electronics and Computing. Bulgaria, Varna, 12-19 September, 2011. a) Total energy spectra of beam-on a-like signals and beam-off particles. b) Total fission-fragment energy spectra, both beam-on and beam-off. The arrows show the energies of events observed in the correlated decay chains. Energy spectra recorded during the 252 MeV 48Ca+ 249Bk run (E=39MeV).

  8. High efficiency of rare decays detecting Good energy and position resolution (35 keV and 0.9 mm for the unirradiated detectors) Low system “dead-time” T = 8 us Operating in low background conditions for the descendant decays XXIII International Symposium on Nuclear Electronics and Computing. Bulgaria, Varna, 12-19 September, 2011. Results Future • New double side silicon strip detector array (x: 128 channels, y: 48 channels – 6144 cells) • Apropriate modern digital electronics (based on PIXIE-16) • “dead-time” less 1 us • Operating in better background conditions

  9. XXIII International Symposium on Nuclear Electronics and Computing. Bulgaria, Varna, 12-19 September, 2011. Thank you for the attention

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