1 / 12

Rare decays with OTPC

Rare decays with OTPC. Marek Pf ü tzner University of Warsaw. 2p emission from 48 Ni 10 atoms, T 1/2 = 2 ms. HIE-ISOLDE Physics Coordination Group , September 3, 2012. Probing the halo of 6 He.  6 He has a very weak decay branch to a + d. The spectrum of a + d. Raabe. Anthony.

shanta
Télécharger la présentation

Rare decays with OTPC

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. Rare decays with OTPC Marek Pfützner University of Warsaw 2p emission from 48Ni 10 atoms, T1/2 = 2 ms HIE-ISOLDE Physics Coordination Group, September 3, 2012

  2. Probing the halo of 6He 6He has a very weak decay branch to a + d

  3. The spectrum of a + d Raabe Anthony Tursunov R. Raabe et al., Phys. Rev. C80 (2009) 054307 Due to b-background, it was not possible to determine the spectrum below ECM  400 keV!

  4. OTPC detection scheme CCD PMT gas at atmospheric pressure incoming bunch of 6He ions d a HV electrodes ionizationelectrons e gating electrode charge amplification zone GEM foils light REX Recordingsystem Trigger

  5. IS505, August 2012

  6. IS505, August 2012

  7. On-line images 6He ions beta decaysduring 650 ms after implantation

  8. bddecay event PMT

  9. bddecay event PMT

  10. A different case – 8He S. Mianowski et al., Acta Phys, Pol. B41 (2010) 449

  11. Decay of 14Be H. Jeppsen et al.Nucl. Phys A709 (2002) 119 Beta delayed d, a, t possible. Only 4 tritons seen.

  12. OTPC @ HIE-Isolde O The detector • OTPC records tracks of charged particles in 3D • Ideal instrument for very rare decay modes • Needs 1 m2 od space (plus a rack od electronics nearby) • Simple and independent acquisition system (but large data volume) Advantages of HIE-Isolde • Energy sufficient for implantation of any ion • Small energy straggling, efficient implantation in a thin gas volume • Bunching makes search for rare particle channels easier Possible future applicationprobing the halo structure by b-delayed particle decays in 8He, 11Li, 14Be

More Related