1 / 12

EURISOL_DS – Task 11 Subtask 5 Neutron- and proton-induced reactions up to Fermi energy

EURISOL_DS – Task 11 Subtask 5 Neutron- and proton-induced reactions up to Fermi energy J. Äystö / V. Rubchenya JYFL, Jyväskylä (P9) / KhRI, St.Petersburg (C4) Deliverables 232 Th(p, fission) – Y(A), TKE, neutrons, gammas, experiment (March 2005)

rowena
Download Presentation

EURISOL_DS – Task 11 Subtask 5 Neutron- and proton-induced reactions up to Fermi energy

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. EURISOL_DS – Task 11 • Subtask 5 • Neutron- and proton-induced reactions up to Fermi energy • J. Äystö / V. Rubchenya • JYFL, Jyväskylä (P9) / KhRI, St.Petersburg (C4) • Deliverables • 232Th(p, fission) – Y(A), TKE, neutrons, gammas, experiment (March 2005) • data processing (Oct. 2005) • II 238U(p, fission) – Yprod(A,Z), JYFLTRAP (Dec. 2005) • III Code developing and calculations of the characteristics of p-induced reactions (Nov. 2005)

  2. 232Th(p, f) • Experiment was carried out during 10th week at JYFL at Ep = 20, 40 and 55 MeV. • Experimental setup consisted of: • Two arm ToF fission fragment spectrometer based on MCP detectors –CORSET • One arm ToF-E fission fragment spectrometer – CORSET • 8 DEMON neutron detectors • 2 position sensitive neutron detectors (PSND) • 12 BaF2 gamma detectors The view of experimental setup and 2D-ToF1-ToF2 spectra are shown in the next slides.

  3. 232Th(p, fission) Experiment was carried out during 10th week at Ep = 20, 40, 55 MeV

  4. JYFLTRAP New method of fission fragment yield measurement Combination of the IGISOL mass separator facility and the JYFLTRAP facility The proposal to JYFL PAC was submitted by March 15, 2005 238U(p, f) at Ep = 30 MeV Y(A,Z) are planned to measure at A = 70 - 170

  5. JYFLTRAP- a triple trap setup beam from IGISOL • Twin Penning trap • 7T superconducting solenoid • Purification trap • Precision trap Spectroscopy station nc = (q/m)(B/2p) A. Nieminen, et al., Phys. Rev. Lett. 88(2002)094801 S. Rinta-Antila et al., Phys. Rev. C 70(2004)011301

  6. Ion Guide Isotope Separator On-Line (IGISOL) overview Interaction region Laser beam Penning trap Cooler/buncher Beam switchyard 55° dipole magnet Ion guide Beam from K130 cyclotron

  7. proton beam Stopping volume Neutral atom U target Ion He inlet p [mbar] 250 5 10-4 10-6 10 kV 30 kV 500 V Fission ion guide p + 238U, 232Th

  8. Purification of isobars for A=101 fission products • FWHM ~ 20 Hz • m/dm = 145000 possible (above spectrum m/dm ~ 53000) • sufficient for mass spectroscopy

  9. ST3 Model of fission process • Pre-equilibrium model in p- and n- reactions with heavy nuclei • Systematics of fission modes from thermal-neutron-induced fission to high excitation energy • Improving description of post scission neutrons

More Related